CN105052919A - Preparation method of water dispersible granules - Google Patents
Preparation method of water dispersible granules Download PDFInfo
- Publication number
- CN105052919A CN105052919A CN201510491160.5A CN201510491160A CN105052919A CN 105052919 A CN105052919 A CN 105052919A CN 201510491160 A CN201510491160 A CN 201510491160A CN 105052919 A CN105052919 A CN 105052919A
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- CN
- China
- Prior art keywords
- preparation
- dispersible granules
- water dispersible
- water
- described step
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000004562 water dispersible granule Substances 0.000 title abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000001192 hot extrusion Methods 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000375 suspending agent Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 239000005906 Imidacloprid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000007884 disintegrant Substances 0.000 description 1
- 239000002552 dosage form Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- YWTYJOPNNQFBPC-UHFFFAOYSA-N imidacloprid Chemical compound [O-][N+](=O)\N=C1/NCCN1CC1=CC=C(Cl)N=C1 YWTYJOPNNQFBPC-UHFFFAOYSA-N 0.000 description 1
- 229940056881 imidacloprid Drugs 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000361 pesticidal effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a preparation method of water dispersible granules and relates to the technical field of chemical engineering. According to the preparation method, pretreatment, mixing, crushing and preparation are performed, heating is performed, the temperature is kept for a certain period, then twin-screw extrusion is performed, and the water dispersible granules are formed through molds or screens. According to the preparation method, the technology is simple, the efficiency is high, and the operability is high.
Description
Technical field
The present invention relates to chemical technology field, be specifically related to a kind of preparation method of water dispersant.
Background technology
Water dispersible granules is a kind of pesticides new formulation grown up America and Europe phase early 1980s, is to grow up, therefore once releasing the concern being subject to agricultural chemicals company of various countries on the basis of wetting powder and suspending agent.
Water dispersible granules is the one of granule, there is the performance of granula, but be different from general granula (in water not disintegration-type), namely it can dissolve or be dispersed in water, and " water dispersible granules is made up of pesticide activity component, wetting agent, dispersant, disintegrant, binding agent and filler, particle diameter 200 1 5000nm.This formulation is applicable to the various pesticide active ingredients such as Working liquids water-soluble solid or water-fast solid, and has both had all advantages of granula, has again the performance of suspending agent polymolecularity, use conveniently, environmental pollution is little, and safety is good, added value is high, good in economic efficiency.
Compare with Traditional Agricultural pharmaceutically dosage form, WDG mainly contains following advantage:
L () does not have dust from flying, reduce the pollution to environment, to operator's safety, and can make hypertoxic kind low toxicity.
(2) compare with suspending agent with wetting powder, active constituent content is high, and mostly more than 70%, product relative density is large, and volume is little, is convenient to packaging, storage and transport.
(3) bin stability and physical and chemical stability better, particularly to agricultural chemicals unstable in water, make this formulation better than suspending agent.
(4) disintegration rate of particle is fast, and particle one touches water can be moistening immediately, and rapid disintegration in the process sunk under the water.
(5) disperse particle in a liquid only need stir tiny particulate a little can disperse in a liquid well, until liquid medicine jet is complete can keep uniformity.
Summary of the invention
It is simple that problem to be solved by this invention is to provide a kind of technique, and efficiency is high, workable imidacloprid wastewater treatment process.
To achieve these goals, the technical scheme that the present invention takes is a kind of preparation method of water dispersant, comprises the steps:
(1) co-grinding: by temperature-sensitive supplementary material and alkali metal, alkali earth metal phosphate and urea in stirrer for mixing, pulverizes after stirring 10-30min;
(2) hot extrusion granulation: utilize Resistant heating 1-2h, then through double helix exrusion, by mould or screen cloth granulating.
Preferably, in described step (1), agitator power controls at 10-50KW.
Preferably, in described step (2), screen mesh is of a size of 1.7mm.
Beneficial effect of the present invention: preparation method of the present invention passes through pretreatment co-grinding preparation, heating and thermal insulation certain hour, then through double helix exrusion, becomes water dispersant by mould or screen cloth, technique is simple, and efficiency is high, workable.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
Embodiment 1:
(1) co-grinding: by temperature-sensitive supplementary material and alkali metal, alkali earth metal phosphate and urea in stirrer for mixing, pulverizes after stirring 10;
(2) hot extrusion granulation: utilize Resistant heating 1h, then through double helix exrusion, by mould or screen cloth granulating.
Based on above-mentioned, preparation method of the present invention passes through pretreatment co-grinding preparation, heating and thermal insulation certain hour, then through double helix exrusion, becomes water dispersant by mould or screen cloth.
Obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (3)
1. a preparation method for water dispersant, is characterized in that: comprise the steps:
(1) co-grinding: by temperature-sensitive supplementary material and alkali metal, alkali earth metal phosphate and urea in stirrer for mixing, pulverizes after stirring 10-30min;
(2) hot extrusion granulation: utilize Resistant heating 1-2h, then through double helix exrusion, by mould or screen cloth granulating.
2. the method for preparation according to claim 1, is characterized in that: in described step (1), agitator power controls at 10-50KW.
3. preparation method according to claim 1, is characterized in that: in described step (2), screen mesh is of a size of 1.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510491160.5A CN105052919A (en) | 2015-08-06 | 2015-08-06 | Preparation method of water dispersible granules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510491160.5A CN105052919A (en) | 2015-08-06 | 2015-08-06 | Preparation method of water dispersible granules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105052919A true CN105052919A (en) | 2015-11-18 |
Family
ID=54482655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510491160.5A Pending CN105052919A (en) | 2015-08-06 | 2015-08-06 | Preparation method of water dispersible granules |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105052919A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0721734A1 (en) * | 1993-10-01 | 1996-07-17 | Nippon Soda Co., Ltd. | Pesticide composition |
| CN1102336C (en) * | 1993-09-23 | 2003-03-05 | 纳幕尔杜邦公司 | Water-dispersible granular agricultural compositions made by heat exhaustion |
| CN101491249A (en) * | 2008-01-22 | 2009-07-29 | 北京绿色农华植保科技有限责任公司 | Preparation method of difenoconazole water dispersible granule |
| CN103379824A (en) * | 2011-02-28 | 2013-10-30 | 日本曹达株式会社 | Method for producing agrochemical granule |
| CN103766346A (en) * | 2013-12-27 | 2014-05-07 | 山东省农药科学研究院 | Water-dispersible granule containing paraquat dichloride and preparation method of water-dispersible granule |
| CN104255716A (en) * | 2014-09-02 | 2015-01-07 | 浙江龙湾化工有限公司 | Thiediazole copper water dispersible granule and preparation method thereof |
-
2015
- 2015-08-06 CN CN201510491160.5A patent/CN105052919A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102336C (en) * | 1993-09-23 | 2003-03-05 | 纳幕尔杜邦公司 | Water-dispersible granular agricultural compositions made by heat exhaustion |
| EP0721734A1 (en) * | 1993-10-01 | 1996-07-17 | Nippon Soda Co., Ltd. | Pesticide composition |
| CN101491249A (en) * | 2008-01-22 | 2009-07-29 | 北京绿色农华植保科技有限责任公司 | Preparation method of difenoconazole water dispersible granule |
| CN103379824A (en) * | 2011-02-28 | 2013-10-30 | 日本曹达株式会社 | Method for producing agrochemical granule |
| CN103766346A (en) * | 2013-12-27 | 2014-05-07 | 山东省农药科学研究院 | Water-dispersible granule containing paraquat dichloride and preparation method of water-dispersible granule |
| CN104255716A (en) * | 2014-09-02 | 2015-01-07 | 浙江龙湾化工有限公司 | Thiediazole copper water dispersible granule and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张国生: "农药水分散粒剂与悬浮剂的配方技术及其应用", 《世界农药》 * |
| 谢毅等: "农药水分散粒剂的研究进展", 《农药科学与管理》 * |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151118 |
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| WD01 | Invention patent application deemed withdrawn after publication |