CN110950714A - Urea-formaldehyde-ammonium nitrate liquid fertilizer and preparation method and application thereof - Google Patents
Urea-formaldehyde-ammonium nitrate liquid fertilizer and preparation method and application thereof Download PDFInfo
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- CN110950714A CN110950714A CN201911114337.4A CN201911114337A CN110950714A CN 110950714 A CN110950714 A CN 110950714A CN 201911114337 A CN201911114337 A CN 201911114337A CN 110950714 A CN110950714 A CN 110950714A
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 206
- 239000007788 liquid Substances 0.000 title claims abstract description 192
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- FYLLEYXMOMXSGK-UHFFFAOYSA-O [N+](=O)([O-])[O-].[NH4+].C=O.NC(=O)N Chemical compound [N+](=O)([O-])[O-].[NH4+].C=O.NC(=O)N FYLLEYXMOMXSGK-UHFFFAOYSA-O 0.000 claims abstract description 117
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229920001807 Urea-formaldehyde Polymers 0.000 claims abstract description 59
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 32
- 239000002904 solvent Substances 0.000 claims abstract description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 48
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 40
- 239000002002 slurry Substances 0.000 claims description 39
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 31
- 239000004202 carbamide Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 28
- 150000001875 compounds Chemical class 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 229910021529 ammonia Inorganic materials 0.000 claims description 17
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 16
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000011573 trace mineral Substances 0.000 claims description 9
- 235000013619 trace mineral Nutrition 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- -1 polyoxymethylene Polymers 0.000 claims description 2
- 229920006324 polyoxymethylene Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000008098 formaldehyde solution Substances 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 12
- 230000008025 crystallization Effects 0.000 abstract description 12
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 abstract description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 8
- 150000001408 amides Chemical class 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 31
- 238000003860 storage Methods 0.000 description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 14
- 235000015097 nutrients Nutrition 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 229910001868 water Inorganic materials 0.000 description 12
- 239000000243 solution Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000004720 fertilization Effects 0.000 description 4
- MGJURKDLIJVDEO-UHFFFAOYSA-N formaldehyde;hydrate Chemical compound O.O=C MGJURKDLIJVDEO-UHFFFAOYSA-N 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 3
- 229910001950 potassium oxide Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000375 suspending agent Substances 0.000 description 3
- BMRKQFGAHRNZCW-UHFFFAOYSA-N [N].C=O.NC(=O)N Chemical compound [N].C=O.NC(=O)N BMRKQFGAHRNZCW-UHFFFAOYSA-N 0.000 description 2
- VYFDHJMUUZUGGZ-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3].[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3].[NH6+3] VYFDHJMUUZUGGZ-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000007836 KH2PO4 Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 108010046334 Urease Proteins 0.000 description 1
- 229940090496 Urease inhibitor Drugs 0.000 description 1
- LQXZLHKVIRVBTC-UHFFFAOYSA-O [N+](=O)([O-])[O-].[NH4+].[P] Chemical compound [N+](=O)([O-])[O-].[NH4+].[P] LQXZLHKVIRVBTC-UHFFFAOYSA-O 0.000 description 1
- RDXARWSSOJYNLI-UHFFFAOYSA-N [P].[K] Chemical compound [P].[K] RDXARWSSOJYNLI-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- CSGLCWIAEFNDIL-UHFFFAOYSA-O azanium;urea;nitrate Chemical compound [NH4+].NC(N)=O.[O-][N+]([O-])=O CSGLCWIAEFNDIL-UHFFFAOYSA-O 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- DSKJXGYAJJHDOE-UHFFFAOYSA-N methylideneurea Chemical compound NC(=O)N=C DSKJXGYAJJHDOE-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002601 urease inhibitor Substances 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229940118149 zinc sulfate monohydrate Drugs 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- RNZCSKGULNFAMC-UHFFFAOYSA-L zinc;hydrogen sulfate;hydroxide Chemical compound O.[Zn+2].[O-]S([O-])(=O)=O RNZCSKGULNFAMC-UHFFFAOYSA-L 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention provides a urea formaldehyde-ammonium nitrate liquid fertilizer and a preparation method and application thereof. The urea-formaldehyde-ammonium nitrate liquid fertilizer comprises a solvent, and further comprises the following components in percentage by mass, with the total mass concentration of the urea-formaldehyde-ammonium nitrate liquid fertilizer being 100%: 1-5% of nitrate nitrogen, 3-6% of ammonium nitrogen, 3-15% of amide nitrogen and 5-20% of urea-formaldehyde nitrogen. The urea formaldehyde-ammonium nitrate liquid fertilizer effectively prolongs the fertilizer efficiency period and improves the utilization rate of the fertilizer through the synergistic effect of a plurality of nitrogen-nourishing components. And the urea formaldehyde-ammonium nitrate liquid fertilizer also has the characteristic of low crystallization temperature and is convenient to use. The preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer has the advantages of easily controlled technological conditions and mild conditions, can effectively ensure the stable performance of the prepared urea formaldehyde-ammonium nitrate liquid fertilizer, effectively improves the preparation efficiency and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of fertilizers, in particular to a urea formaldehyde-ammonium nitrate liquid fertilizer and a preparation method and application thereof.
Background
In recent years, the unreasonable use problem of chemical fertilizers is more and more prominent, and the ecological environment is adversely affected. Therefore, the organization in the rural area of agriculture implements major items of soil testing, formula fertilization, zero fertilizer growth, water and fertilizer integration and the like, popularizes scientific fertilization technology, improves fertilizer utilization rate and obtains remarkable effect.
As a novel fertilizer, the liquid fertilizer has the characteristics of flexible formula, low production cost, no pollution, good water solubility, less impurities, quick fertilizer efficiency, high utilization rate, convenient use and the like. Particularly, with the popularization of domestic water and fertilizer integration technology, liquid fertilizer is gradually and widely applied, and the liquid fertilizer industry is about to be developed at a new stage. However, as the liquid fertilizer industry in China just starts, some products have some problems or defects, which are embodied in the following aspects:
1. liquid fertilizers, particularly high-nutrient varieties, are easy to crystallize at low temperature, such as urea ammonium nitrate solution (UAN), and can crystallize at-18 ℃ when the nitrogen content reaches 28%; when the nitrogen content reaches 30 percent, the crystal will be generated at minus 10 ℃; when the nitrogen content reaches 32 percent, the crystal will be crystallized at the temperature of-2 ℃, so that the crystal is not suitable for circulation, storage and use in northern areas in winter.
2. The common liquid fertilizer has short fertilizer efficiency period and needs a small amount of application for a plurality of times, thereby increasing the labor cost.
3. Even if the release period of the liquid fertilizer is prolonged to a certain extent by adding components such as urease inhibitor, nitrification inhibitor and the like, the different additives have high requirements on the pH value, temperature, humidity and the like of soil, and sometimes the slow release effect is not shown or even is quite opposite.
4. In the production of some liquid fertilizers with higher nutrients, various suspending agents are required to avoid crystallization or stratification during storage of the fertilizer. However, most of these suspending agents are expensive, and the relatively inexpensive suspending agents are not soluble or poorly soluble in water, and are not suitable for drip irrigation work with integration of water and fertilizer.
Therefore, how to overcome the defects of easy crystallization, short fertilizer efficiency, high requirement on soil, high cost and the like of the existing liquid fertilizer, and the technical problems of improving the stability and universality of the liquid fertilizer and prolonging the fertilizer efficiency period are always solved by researchers in the field.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a urea formaldehyde-ammonium nitrate liquid fertilizer and a preparation method thereof, which aim to solve the technical problems of easy crystallization, short fertilizer efficiency, requirements on soil, high cost and the like of the conventional liquid fertilizer.
In order to achieve the above object, in one aspect of the present invention, a urea formaldehyde-ammonium nitrate liquid fertilizer is provided. The urea formaldehyde-ammonium nitrate liquid fertilizer also comprises the following components in percentage by mass based on 100 percent of the total mass concentration of the urea formaldehyde-ammonium nitrate liquid fertilizer:
in another aspect of the invention, a preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer is provided. The preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer comprises the following steps:
after formaldehyde, urea and ammonia are subjected to first mixing treatment, adjusting the pH value of the formed mixed solution to 7.0-10.5, and then performing heating treatment to perform urea-formaldehyde reaction treatment to obtain urea-formaldehyde slurry;
maintaining the temperature of the urea-formaldehyde slurry, and performing second mixing treatment on the urea-formaldehyde slurry and the preheated ammonium nitrate according to a proportion to obtain a urea-formaldehyde-ammonium nitrate liquid fertilizer; and in the second mixing treatment process, controlling the pH value of the mixed liquid of the urea-formaldehyde slurry and the ammonium nitrate to be 7.0-10.5.
In another aspect of the invention, a urea formaldehyde-ammonium nitrate liquid functional fertilizer is provided. The urea formaldehyde-ammonium nitrate liquid functional fertilizer contains a proper amount of secondary elements and trace elements, and also contains urea formaldehyde-ammonium nitrate liquid fertilizer; wherein the urea formaldehyde-ammonium nitrate liquid fertilizer is the urea formaldehyde-ammonium nitrate liquid fertilizer.
In another aspect of the invention, a urea formaldehyde-ammonium nitrate liquid compound fertilizer is provided. The urea formaldehyde-ammonium nitrate liquid compound fertilizer contains a proper amount of fully water-soluble phosphorus element and potassium element and also contains urea formaldehyde-ammonium nitrate liquid compound fertilizer; wherein the urea formaldehyde-ammonium nitrate liquid fertilizer is the urea formaldehyde-ammonium nitrate liquid fertilizer.
Compared with the prior art, the nitrogen-nutrient components contained in the urea-formaldehyde-ammonium nitrate liquid fertilizer exist in various forms such as nitrate nitrogen, ammonium nitrogen, amide nitrogen, urea-formaldehyde nitrogen and the like, and the urea-formaldehyde-ammonium nitrate liquid fertilizer has the multi-stage fertilizer effect release functions of immediate effect, quick effect, intermediate effect and long effect through the synergistic effect among the various nitrogen-nutrient components, so that the fertilizer effect period is effectively prolonged, no additional fertilizer or less additional fertilizer can be achieved, the nutritional requirements of the whole growth period of crops are met, the utilization rate of the urea-formaldehyde-ammonium nitrate liquid fertilizer is improved, and the labor cost is greatly reduced. In addition, the urea formaldehyde-ammonium nitrate liquid fertilizer also has the characteristic of low crystallization temperature which is 5 to 15 ℃ lower than that of the common liquid fertilizer with the same nutrient specification, and the clear retention period can reach more than 180 days, so that the urea formaldehyde-ammonium nitrate liquid fertilizer is suitable for being stored and used in all regions in the south of the Yangtze river and most regions in the north of the Yangtze river in winter. Secondly, when the urea formaldehyde-ammonium nitrate liquid fertilizer is used as a foliar fertilizer, the damage to the leaf surface of crops is effectively avoided, so the liquid fertilizer can be directly sprayed after being diluted and is convenient to use.
The urea formaldehyde-ammonium nitrate liquid fertilizer is prepared by preparing urea formaldehyde from formaldehyde, urea and ammonia, and then mixing the urea formaldehyde with ammonium nitrate to prepare the stable urea formaldehyde-ammonium nitrate liquid fertilizer, so that nitrogen nutrient components contained in the prepared urea formaldehyde-ammonium nitrate liquid fertilizer exist in various forms of nitrate nitrogen, ammonium nitrogen, amide nitrogen, urea formaldehyde nitrogen and the like, and thus the urea formaldehyde-ammonium nitrate liquid fertilizer has the multi-stage fertilizer efficiency release functions of immediate effect, quick effect, intermediate effect and long effect, the fertilizer efficiency period is effectively prolonged, the crystallization temperature of the urea formaldehyde-ammonium nitrate liquid fertilizer is low, and the urea formaldehyde-ammonium nitrate liquid fertilizer has no harm to crop leaf surfaces. In addition, the preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer has the advantages of easily controlled technological conditions and mild conditions, can effectively ensure the stable performance of the prepared urea formaldehyde-ammonium nitrate liquid fertilizer, effectively improves the preparation efficiency and reduces the production cost.
The urea formaldehyde-ammonium nitrate liquid functional fertilizer and the urea formaldehyde-ammonium nitrate liquid compound fertilizer contain the urea formaldehyde-ammonium nitrate liquid fertilizer, so the urea formaldehyde-ammonium nitrate liquid functional fertilizer and the urea formaldehyde-ammonium nitrate liquid compound fertilizer not only have the advantages of the urea formaldehyde-ammonium nitrate liquid fertilizer, but also contain other nutrient components required by plants, and are suitable for the water-fertilizer integrated fertilization effect.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic process flow diagram of a preparation method of a urea formaldehyde-ammonium nitrate liquid fertilizer according to an embodiment of the invention;
FIG. 2 is a schematic view of a process flow of an industrial production line of urea formaldehyde-ammonium nitrate liquid fertilizer according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The mass of each component mentioned in the description of the embodiment of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the mass between each component, and therefore, it is within the scope of the disclosure of the description of the embodiment of the present invention to scale up or down the content of each component according to the description of the embodiment of the present invention. Specifically, the mass described in the description of the embodiments of the present invention may be a mass unit known in the chemical industry field, such as μ g, mg, g, and kg.
In one aspect, the embodiment of the present invention provides a urea formaldehyde-ammonium nitrate liquid fertilizer (denoted as UFAN). The urea formaldehyde-ammonium nitrate liquid fertilizer also comprises the following components in percentage by mass, with the total mass concentration of the urea formaldehyde-ammonium nitrate liquid fertilizer being 100 percent:
in addition, the total nitrogen content of the urea formaldehyde-ammonium nitrate liquid fertilizer can be adjusted by adjusting the content of nitrogen nutrient components contained in the urea formaldehyde-ammonium nitrate liquid fertilizer, and in an embodiment, the total nitrogen content of the urea formaldehyde-ammonium nitrate liquid fertilizer can be controlled to be 28-35% by mass. Specifically, the total nitrogen content can be controlled to be 28% (recorded as UFAN28), 30% (recorded as UFAN30), 32% (recorded as UFAN32), 33% (recorded as UFAN33), 35% (recorded as UFAN35) and the like. In another embodiment, the urea-formaldehyde-ammonium nitrate liquid fertilizer contains a solvent capable of dissolving the nitrogen nutrient components contained in various forms, such as water.
Thus, the urea-formaldehyde-ammonium nitrate liquid fertilizer contains nitrogen nutrient components in various forms such as nitrate nitrogen, ammonium nitrogen, amide nitrogen, urea-formaldehyde nitrogen and the like, wherein the nitrate nitrogen can be directly absorbed by crops, and the ammonium nitrogen is converted into the nitrate nitrogen through nitrifying bacteria and absorbed by the crops; the amide nitrogen is decomposed into ammonium nitrogen under the action of urease and then converted into nitrate nitrogen through nitrification to be absorbed by crops; the urea-formaldehyde nitrogen is a long molecular chain substance, contains methylene urea with different lengths, is easily adsorbed by root systems to avoid loss, and is required to gradually decompose urea-ammonium nitrogen-nitrate nitrogen through 15-90 days of unequal periods under the action of microorganisms, so that the urea-ammonium nitrogen-nitrate nitrogen is absorbed by crops, and the utilization rate of the fertilizer can reach over 95 percent. Therefore, the urea formaldehyde-ammonium nitrate liquid fertilizer has the functions of instant effect, quick effect, intermediate effect and long effect of a multi-stage rocket through the synergistic effect of the contained nitrogen nutrient components, the fertilizer effect period is effectively prolonged, no additional fertilizer or little additional fertilizer can be achieved, the nutritional requirements of the whole growth period of crops are met, the utilization rate of the urea formaldehyde-ammonium nitrate liquid fertilizer is improved to more than 95%, and the labor cost is greatly reduced. In addition, the urea formaldehyde-ammonium nitrate liquid fertilizer also has the characteristic of low crystallization temperature which is 5 to 15 ℃ lower than that of the common liquid fertilizer with the same nutrient specification, and the clear retention period can reach more than 180 days, so that the urea formaldehyde-ammonium nitrate liquid fertilizer is suitable for being stored and used in all regions in the south of the Yangtze river and most regions in the north of the Yangtze river in winter. Secondly, when the urea formaldehyde-ammonium nitrate liquid fertilizer is used as a foliar fertilizer, the damage to the leaf surface of crops is effectively avoided, so the liquid fertilizer can be directly sprayed after being diluted and is convenient to use.
On the other hand, on the basis of the urea formaldehyde-ammonium nitrate liquid fertilizer, the embodiment of the invention also provides a preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer. The preparation method and the process of the urea formaldehyde-ammonium nitrate liquid fertilizer are shown in figure 1, and the preparation method comprises the following steps:
s01: after formaldehyde, urea and ammonia are subjected to first mixing treatment, adjusting the pH value of the formed mixed solution to 7.0-10.5, and then performing heating treatment to perform urea-formaldehyde reaction treatment to obtain urea-formaldehyde slurry;
s02: and maintaining the temperature of the urea-formaldehyde slurry, and performing second mixing treatment on the urea-formaldehyde slurry and the preheated ammonium nitrate according to a proportion to obtain the urea-formaldehyde-ammonium nitrate liquid fertilizer.
And (3) performing urea-formaldehyde reaction on the formaldehyde, the urea and the ammonia in the step (S01) under the conditions of pH 7.0-10.5 and heating treatment to generate urea-formaldehyde slurry. In one embodiment, the heating treatment is to heat the mixture of formaldehyde, urea and ammonia to 60-99 ℃. Allowing formaldehyde, urea and ammonia to react sufficiently to form urea formaldehyde (noted UF).
In one embodiment, the method for obtaining the urea-formaldehyde slurry in the step S01 includes the following steps:
s011: after formaldehyde, urea and ammonia are subjected to first mixing treatment, adjusting the pH value of the formed mixed solution to 7.0-10.5, and then performing first heating treatment to perform urea-formaldehyde reaction treatment to obtain first urea-formaldehyde slurry;
s012: and continuously carrying out second heating treatment on the first urea-formaldehyde slurry to carry out urea-formaldehyde reaction treatment again to obtain the urea-formaldehyde slurry.
In a further embodiment, the temperature of the first heating treatment is 60-99 ℃ and the time is 30-120 minutes; the temperature of the second heating treatment is 60-99 ℃, and the time is 10-60 minutes.
In specific embodiments, the formaldehyde may be at least one of aqueous formaldehyde, solid formaldehyde, polyoxymethylene, or urea and a formaldehyde precondensate (e.g., UFC60, UFC85, etc.); the urea can be liquid urea, small particle urea, large particle urea or powder urea; the ammonia can be ammonia water with various specifications, and can also be liquid ammonia or gas ammonia. In addition, in one embodiment, the formaldehyde, the urea and the ammonia are mixed in a molar ratio of 1 (0.5-8) to (0.05-0.5) for the first mixing treatment.
By optimizing the steps and reaction conditions of the urea-formaldehyde reaction treatment in the step S01, such as optimizing the two-step urea-formaldehyde reaction treatment in the steps S011 and S012, the formaldehyde, urea and ammonia are subjected to urea-formaldehyde reaction, the urea-formaldehyde generation rate is improved, and the urea-formaldehyde is ensured to have various nutrient components in corresponding slow release periods.
In the step S02, the urea-formaldehyde slurry and the ammonium nitrate react to generate the urea-formaldehyde-ammonium nitrate liquid fertilizer in the process of mixing and processing at a pH value of 7.0 to 10.5, so that the urea-formaldehyde-ammonium nitrate liquid fertilizer contains the nitrogen-nutrient components in the above contents, including nitrate nitrogen, ammonium nitrogen, amide nitrogen, urea-formaldehyde nitrogen, and the like, in various forms. In one embodiment, the urea-formaldehyde slurry and the ammonium nitrate are subjected to a second mixing treatment according to a mass ratio of (0.1-10) to 1, specifically 3: 1. In a specific embodiment, the ammonium nitrate may be liquid ammonium nitrate, granular or powdered ammonium nitrate, or ammonium phosphorus nitrate containing phosphorus such as a small amount of phosphorus after safety treatment. The urea-formaldehyde-ammonium nitrate liquid fertilizer has the advantages that the generation of nitrogen-nutrient components in various forms is improved by optimizing the mixing proportion and the reaction environment of the urea-formaldehyde slurry and the ammonium nitrate, so that the generated urea-formaldehyde-ammonium nitrate liquid fertilizer has the multistage fertilizer effect functions of immediate effect, quick effect, intermediate effect and long effect, and the fertilizer effect period and the stability of the urea-formaldehyde-ammonium nitrate liquid fertilizer are effectively prolonged.
In addition, the first mixing process in step S01 and the second mixing process in step S02 may be mixed in a conventional mixing manner, such as but not limited to a stirring mixing manner.
After the second mixing treatment in step S02, the urea formaldehyde-ammonium nitrate liquid fertilizer may be introduced into the urea formaldehyde-ammonium nitrate liquid fertilizer finished product storage tank for later use. Then, the processes such as metering and packaging are carried out.
Therefore, in a specific embodiment, in order to industrially produce the urea formaldehyde-ammonium nitrate liquid fertilizer, based on the above-mentioned preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer, a large amount of production can be performed according to the production line shown in fig. 2.
Therefore, the urea formaldehyde-ammonium nitrate liquid fertilizer is prepared by taking formaldehyde, urea, ammonia and ammonium nitrate as raw materials, so that the prepared urea formaldehyde-ammonium nitrate liquid fertilizer contains nitrogen nutrients in various forms such as nitrate nitrogen, ammonium nitrogen, amide nitrogen, urea formaldehyde nitrogen and the like, has the multi-stage fertilizer effect release functions of immediate effect, quick effect, medium effect and long effect, effectively prolongs the fertilizer effect period, and has low crystallization temperature and no damage to crop leaf surfaces. In addition, the preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer has the advantages of easily controlled technological conditions and mild conditions, can effectively ensure the stable performance of the prepared urea formaldehyde-ammonium nitrate liquid fertilizer, effectively improves the preparation efficiency and reduces the production cost.
In another aspect, based on the urea formaldehyde-ammonium nitrate liquid fertilizer and the preparation method thereof, the embodiment of the invention also provides a urea formaldehyde-ammonium nitrate liquid functional fertilizer and a urea formaldehyde-ammonium nitrate liquid compound fertilizer.
The urea formaldehyde-ammonium nitrate liquid functional fertilizer contains a proper amount of secondary elements and trace elements, and also contains urea formaldehyde-ammonium nitrate liquid fertilizer; wherein the urea formaldehyde-ammonium nitrate liquid fertilizer is the urea formaldehyde-ammonium nitrate liquid fertilizer or the urea formaldehyde-ammonium nitrate liquid fertilizer prepared by the preparation method. The medium elements and the trace elements can be conventional medium elements and trace elements of liquid fertilizers, and can be one or more of medium and trace elements such as calcium, magnesium, sulfur, zinc, boron, manganese and the like. In addition, the urea formaldehyde-ammonium nitrate liquid functional fertilizer contains secondary elements and trace elements, and the secondary elements and the trace elements are added into the urea formaldehyde-ammonium nitrate liquid functional fertilizer to form the stable urea formaldehyde-ammonium nitrate liquid functional fertilizer. In one embodiment, the preparation method of the urea formaldehyde-ammonium nitrate liquid functional fertilizer can comprise the following steps:
A. preparing the urea-formaldehyde slurry according to the method of step S01 above;
B. and maintaining the temperature of the urea-formaldehyde slurry, and performing second mixing treatment on the urea-formaldehyde slurry, the preheated ammonium nitrate and the medium trace elements in proportion to obtain the urea-formaldehyde-ammonium nitrate liquid functional fertilizer.
The urea formaldehyde-ammonium nitrate liquid compound fertilizer contains a proper amount of fully water-soluble phosphorus element and potassium element and also contains urea formaldehyde-ammonium nitrate liquid compound fertilizer; wherein the urea formaldehyde-ammonium nitrate liquid fertilizer is the urea formaldehyde-ammonium nitrate liquid fertilizer or the urea formaldehyde-ammonium nitrate liquid fertilizer prepared by the preparation method. The content of the phosphorus element and the potassium element can be the conventional content of the phosphorus element and the potassium element of the composite liquid fertilizer. In addition, the urea formaldehyde-ammonium nitrate liquid functional fertilizer can be prepared by adding phosphorus and potassium elements into the urea formaldehyde-ammonium nitrate liquid functional fertilizer for full dispersion to form a stable urea formaldehyde-ammonium nitrate liquid compound fertilizer. In one embodiment, the method for preparing the urea formaldehyde-ammonium nitrate liquid compound fertilizer can comprise the following steps:
A. preparing the urea-formaldehyde slurry according to the method of step S01 above;
C. and maintaining the temperature of the urea-formaldehyde slurry, and performing second mixing treatment on the urea-formaldehyde slurry, the preheated ammonium nitrate and the water-soluble phosphorus potassium raw material in proportion to obtain the urea-formaldehyde-ammonium nitrate liquid compound fertilizer.
Therefore, the urea formaldehyde-ammonium nitrate liquid functional fertilizer and the urea formaldehyde-ammonium nitrate liquid compound fertilizer contain the urea formaldehyde-ammonium nitrate liquid fertilizer, not only have the advantages of the urea formaldehyde-ammonium nitrate liquid fertilizer, but also contain other nutrient components required by plants, and are suitable for water and fertilizer integrated fertilization application.
The urea formaldehyde-ammonium nitrate liquid fertilizer and the preparation method thereof according to the embodiments of the present invention are illustrated by the following specific examples.
Example 1
The embodiment of the invention provides a urea formaldehyde-ammonium nitrate liquid fertilizer and a preparation method thereof. The urea-formaldehyde-ammonium nitrate liquid fertilizer comprises water, and further comprises the following components in percentage by mass based on 100% of the total mass concentration of the urea-formaldehyde-ammonium nitrate liquid fertilizer:
the preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer is shown in figures 1 and 2, and comprises the following steps:
s11: adding a formaldehyde water solution, small granular urea and liquid ammonia into a No. 1 reaction kettle according to a molar ratio of 1: 0.5-5: 0.1-1, adjusting the pH value to 7.0-10.5 by using a proper amount of NaOH, adjusting a heating and heat-preserving device of the reaction kettle to keep the temperature of the No. 1 reaction kettle at 60-95 ℃, and continuously reacting for 60 minutes under the condition of continuous stirring of a stirrer;
s12: introducing the slurry of the No. 1 reaction kettle in the step S11 into a No. 2 reaction kettle, adjusting a heating and heat-insulating device of the No. 2 reaction kettle to keep the temperature of the medium at 60-95 ℃, continuously operating a stirrer to ensure that the quality of the urea-formaldehyde slurry is stable and uniform, and continuously reacting for 30 minutes for later use;
s13: metering preheated (the temperature reaches 60-80 ℃) ammonium nitrate according to the mass ratio of UF to AN being 3:1, slowly adding the ammonium nitrate into the 2# reaction kettle in the step S12, fully and uniformly mixing the ammonium nitrate and the AN for later use under the action of a stirrer, and continuously adjusting the pH value to 7.0-10.5 by using NaOH in the period;
s14: guiding the mixed liquid in the 2# reaction kettle in the step S13 into a UFAN finished product storage tank for later use; the UFAN finished product storage tank is a 1# finished product storage tank and a 2# finished product storage tank which are alternately used, so that the temperature of the mixed solution led out from the 2# reaction kettle is reduced to room temperature or the temperature close to the room temperature.
S15: and (4) measuring and packaging the UFAN in the UFAN storage tank cooled to the room temperature or close to the room temperature in the step (S14) to obtain the urea formaldehyde and ammonium nitrate liquid fertilizer with the total nitrogen content of 35%, which is referred to as UFAN35 liquid fertilizer for short.
Example 2
The embodiment of the invention provides a urea formaldehyde-ammonium nitrate liquid fertilizer and a preparation method thereof. The urea-formaldehyde-ammonium nitrate liquid fertilizer comprises water, and further comprises the following components in percentage by 100 percent of the total concentration of the urea-formaldehyde-ammonium nitrate liquid fertilizer:
the preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer is shown in figures 1 and 2, and comprises the following steps:
s11: adding a formaldehyde water solution, small granular urea and liquid ammonia into a No. 1 reaction kettle according to a molar ratio of 1: 0.5-5: 0.1-1, adjusting the pH value to 7.0-10.5 by using a proper amount of NaOH, adjusting a heating and heat-preserving device of the reaction kettle to keep the temperature of the No. 1 reaction kettle at 60-95 ℃, and continuously reacting for 50 minutes under the condition of continuous stirring of a stirrer;
s12: introducing the slurry of the No. 1 reaction kettle in the step S11 into a No. 2 reaction kettle, adjusting a heating and heat-insulating device of the No. 2 reaction kettle to keep the temperature of the medium at 60-95 ℃, continuously operating a stirrer to ensure that the quality of the urea-formaldehyde slurry is stable and uniform, and continuously reacting for 30 minutes for later use;
s13: metering preheated (the temperature reaches 60-80 ℃) ammonium nitrate according to the mass ratio of UF to AN being 4:1, slowly adding the ammonium nitrate into the 2# reaction kettle in the step S12, fully and uniformly mixing the ammonium nitrate and the AN for later use under the action of a stirrer, and continuously adjusting the pH value to 7.0-10.5 by using NaOH in the period;
s14: guiding the mixed liquid in the 2# reaction kettle in the step S13 into a UFAN finished product storage tank for later use; the UFAN finished product storage tank is a 1# finished product storage tank and a 2# finished product storage tank which are alternately used, so that the temperature of the mixed solution led out from the 2# reaction kettle is reduced to room temperature or the temperature close to the room temperature.
S15: and (4) measuring and packaging the UFAN in the UFAN storage tank cooled to the room temperature or close to the room temperature in the step (S14) to obtain the urea formaldehyde and ammonium nitrate liquid fertilizer with the total nitrogen content of 32%, which is referred to as UFAN32 liquid fertilizer for short.
Example 3
The embodiment of the invention provides a urea formaldehyde-ammonium nitrate liquid functional fertilizer and a preparation method thereof. The urea-formaldehyde-ammonium nitrate liquid functional fertilizer comprises water, and further comprises the following components in percentage by 100 percent:
the preparation method of the urea formaldehyde-ammonium nitrate liquid functional fertilizer is shown in figures 1 and 2, and comprises the following steps:
s11: adding a formaldehyde water solution, small granular urea and liquid ammonia into a No. 1 reaction kettle according to a molar ratio of 1: 0.5-5: 0.1-1, adjusting the pH value to 7.0-10.5 by using a proper amount of NaOH, adjusting a heating and heat-preserving device of the reaction kettle to keep the temperature of the No. 1 reaction kettle at 60-95 ℃, and continuously reacting for 50 minutes under the condition of continuous stirring of a stirrer;
s12: will be described in detailS11, introducing the slurry of the No. 1 reaction kettle into a No. 2 reaction kettle, adjusting a heating and heat-insulating device of the No. 2 reaction kettle to keep the temperature of the medium at 60-95 ℃, continuously operating a stirrer to ensure that the quality of the urea-formaldehyde slurry is stable and uniform, and continuously reacting for 30 minutes for later use;
s13: ammonium nitrate and zinc sulfate monohydrate, preheated (temperature up to 60-80 ℃), are mixed according to UF: AN: ZnSO4.H2After the mass ratio of O to the total amount of the components is 4:1:0.015, slowly adding the components into the 2# reaction kettle in the step S12, fully and uniformly mixing the components for standby under the action of a stirrer, and continuously adjusting the pH value to 7.0-10.5 by using NaOH in the period;
s14: guiding the mixed liquid in the 2# reaction kettle in the step S13 into a UFAN finished product storage tank for later use; the UFAN finished product storage tank is a 1# finished product storage tank and a 2# finished product storage tank which are alternately used, so that the temperature of the mixed solution led out from the 2# reaction kettle is reduced to room temperature or the temperature close to the room temperature.
S15: and (4) measuring and packaging the UFAN in the UFAN storage tank cooled to the room temperature or close to the room temperature in the step (S14) to obtain the urea formaldehyde and ammonium nitrate liquid functional fertilizer containing 32% of total nitrogen and 0.1% of zinc, which is called UFAN32 liquid functional fertilizer (zinc).
Example 4
The embodiment of the invention provides a urea formaldehyde-ammonium nitrate liquid compound fertilizer and a preparation method thereof. The urea formaldehyde-ammonium nitrate liquid compound fertilizer comprises water, and further comprises the following components in percentage by 100 percent of the total concentration of the urea formaldehyde-ammonium nitrate liquid compound fertilizer:
the preparation method of the urea formaldehyde-ammonium nitrate liquid compound fertilizer is shown in figures 1 and 2 and comprises the following steps:
s11: adding a formaldehyde water solution, small granular urea and liquid ammonia into a No. 1 reaction kettle according to a molar ratio of 1: 0.5-5: 0.1-1, adjusting the pH value to 7.0-10.5 by using a proper amount of NaOH, adjusting a heating and heat-preserving device of the reaction kettle to keep the temperature of the No. 1 reaction kettle at 60-95 ℃, and continuously reacting for 60 minutes under the condition of continuous stirring of a stirrer;
s12: introducing the slurry of the No. 1 reaction kettle in the step 11 into a No. 2 reaction kettle, adjusting a heating and heat-insulating device of the No. 2 reaction kettle to keep the temperature of the medium at 60-95 ℃, continuously operating a stirrer to ensure that the quality of the urea-formaldehyde slurry is stable and uniform, and continuously reacting for 30 minutes for later use;
s13: ammonium nitrate, potassium dihydrogen phosphate, potassium nitrate and water which are preheated (the temperature reaches 60-80 ℃) are mixed according to the following ratio of UF to AN: KNO3:KH2PO4:H2After the mass ratio of O to O is 3.1:1:1:3.9, slowly adding the mixture into the 2# reaction kettle in the step S12, fully and uniformly mixing the mixture for standby under the action of a stirrer, and continuously adjusting the pH value to 7.0-10.5 by using NaOH in the period;
s14: guiding the mixed liquid in the 2# reaction kettle in the step S13 into a UFAN finished product storage tank for later use; the UFAN finished product storage tank is a 1# finished product storage tank and a 2# finished product storage tank which are alternately used, so that the temperature of the mixed solution led out from the 2# reaction kettle is reduced to room temperature or the temperature close to the room temperature.
S15: the slurry in the UFAN storage tank cooled to room temperature or near room temperature in the step S14 is measured and packaged to obtain the product with nitrogen content of 12%, P2O5Content 12%, K2Urea formaldehyde-ammonium nitrate liquid compound fertilizer with O content of 12% and total content of 36%.
Comparative example 1
This comparative example 1 provides a commercially available liquid fertilizer-urea ammonium nitrate solution UAN 28.
Comparative example 2
This comparative example 2 provides a commercially available liquid fertilizer-urea ammonium nitrate solution UAN 30.
Comparative example 3
This comparative example 3 provides a commercially available liquid fertilizer-urea ammonium nitrate solution UAN 32.
Comparative example 4
This comparative example 4 provides a commercially available liquid fertilizer of nitrogen 12 phosphorus pentoxide 12 potassium oxide 12.
The examples were tested for comparative performance, the results of which are shown in table 1 below.
TABLE 1
| Crystallization temperature | Storage time at normal temperature | Remarks for note | |
| Example 1 UFAN35 | -15℃ | 180 days | Clear liquid type |
| Example 2 UFAN32 | -18℃ | 200 days | Clear liquid type |
| Example 3 UFAN32 (containing zinc) | -18℃ | 200 days | Clear liquid type |
| EXAMPLE 4 Nitrogen 12 phosphorus pentoxide 12 Potassium oxide 12 | -15℃ | 180 days | Clear liquid type |
| Comparative example 1 UAN28 liquid fertilizer | -18℃ | 150 days | Clear liquid type |
| Comparative example 2 UAN30 liquid fertilizer | -10℃ | 120 days | Clear liquid type |
| Comparative example 3 UAN32 liquid fertilizer | -2℃ | 100 days | Clear liquid type |
| Comparative example 4 Nitrogen 12 phosphorus pentoxide 12 Potassium oxide 12 | 5℃ | 90 days | Clear liquid type |
As can be seen from the crystallization temperature and storage time experimental data in Table 1, although the nutrient contents of examples 1 to 3 are relative to each other 1 to 3, the crystallization temperature of examples 1 to 3 is lower and the storage time is relatively longer. Therefore, the urea-formaldehyde-ammonium nitrate liquid compound fertilizers provided by the examples 1-3 have better stability than the commercial liquid fertilizer-urea ammonium nitrate solution in the market. Compared with the comparative example 4, the crystallization temperature is lower, and the storage time is twice of that of the existing liquid fertilizer, so that the stability of the urea formaldehyde-ammonium nitrate liquid compound fertilizer provided by the example 4 is better than that of the common commercial liquid fertilizer on the market.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The urea formaldehyde-ammonium nitrate liquid fertilizer is characterized by comprising a solvent and further comprising the following components in percentage by mass, wherein the total mass concentration of the urea formaldehyde-ammonium nitrate liquid fertilizer is 100 percent:
2. the urea-formaldehyde-ammonium nitrate liquid fertilizer according to claim 1, characterized in that: the total nitrogen mass percentage of the urea formaldehyde-ammonium nitrate liquid fertilizer is 28-35%.
3. The preparation method of the urea formaldehyde-ammonium nitrate liquid fertilizer is characterized by comprising the following steps:
after formaldehyde, urea and ammonia are subjected to first mixing treatment, adjusting the pH value of the formed mixed solution to 7.0-10.5, and then performing heating treatment to perform urea-formaldehyde reaction treatment to obtain urea-formaldehyde slurry;
maintaining the temperature of the urea-formaldehyde slurry, and performing second mixing treatment on the urea-formaldehyde slurry and the preheated ammonium nitrate according to a proportion to obtain a urea-formaldehyde-ammonium nitrate liquid fertilizer; and in the second mixing treatment process, controlling the pH value of the mixed liquid of the urea-formaldehyde slurry and the ammonium nitrate to be 7.0-10.5.
4. The method for preparing according to claim 3, wherein the method for obtaining the urea-formaldehyde slurry comprises the steps of:
after formaldehyde, urea and ammonia are subjected to first mixing treatment, adjusting the pH value of the formed mixed solution to 7.0-10.5, and then performing first heating treatment to perform urea-formaldehyde reaction treatment to obtain first urea-formaldehyde slurry;
and continuously carrying out second heating treatment on the first urea-formaldehyde slurry to carry out urea-formaldehyde reaction treatment again to obtain the urea-formaldehyde slurry.
5. The method according to claim 4, wherein the first heat treatment is carried out at a temperature of 60 to 99 ℃ for 30 to 120 minutes; and/or
The temperature of the second heating treatment is 60-99 ℃, and the time is 10-60 minutes.
6. The method according to any one of claims 3 to 5, wherein the formaldehyde, urea and ammonia are subjected to the first mixing treatment in a molar ratio of 1 (0.5 to 8) to (0.05 to 0.5).
7. The preparation method according to any one of claims 3 to 5, wherein the urea-formaldehyde slurry and the ammonium nitrate are subjected to a second mixing treatment in a mass ratio of (0.1-10): 1.
8. The method according to any one of claims 3 to 5, wherein the formaldehyde is at least one of an aqueous formaldehyde solution, solid formaldehyde, polyoxymethylene, or urea and a formaldehyde precondensate;
the ammonia is at least one of ammonia water, liquid ammonia or gas ammonia.
9. The urea formaldehyde-ammonium nitrate liquid functional fertilizer is characterized in that: the urea formaldehyde ammonium nitrate liquid functional fertilizer contains a proper amount of secondary elements and trace elements, and also contains urea formaldehyde-ammonium nitrate liquid fertilizer; wherein the urea formaldehyde-ammonium nitrate liquid fertilizer is the urea formaldehyde-ammonium nitrate liquid fertilizer as defined in any one of claims 1-2 or the urea formaldehyde-ammonium nitrate liquid fertilizer prepared by the preparation method as defined in any one of claims 3-8.
10. A urea formaldehyde-ammonium nitrate liquid compound fertilizer is characterized in that: the urea formaldehyde-ammonium nitrate liquid compound fertilizer contains a proper amount of fully water-soluble phosphorus element and potassium element and also contains urea formaldehyde-ammonium nitrate liquid compound fertilizer; wherein the urea formaldehyde-ammonium nitrate liquid fertilizer is the urea formaldehyde-ammonium nitrate liquid fertilizer as defined in any one of claims 1-2 or the urea formaldehyde-ammonium nitrate liquid fertilizer prepared by the preparation method as defined in any one of claims 3-8.
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| CN101426750A (en) * | 2006-02-21 | 2009-05-06 | 佐治亚-太平洋化工品有限公司 | High nitrogen liquid fertilizer |
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