CN106853962A - A kind of feed-level calcium biphosphate and preparation method thereof - Google Patents
A kind of feed-level calcium biphosphate and preparation method thereof Download PDFInfo
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- CN106853962A CN106853962A CN201611173002.6A CN201611173002A CN106853962A CN 106853962 A CN106853962 A CN 106853962A CN 201611173002 A CN201611173002 A CN 201611173002A CN 106853962 A CN106853962 A CN 106853962A
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- calcium
- phosphoric acid
- acid solution
- feed
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- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 title claims abstract description 30
- 229910000389 calcium phosphate Inorganic materials 0.000 title claims abstract description 29
- 235000019691 monocalcium phosphate Nutrition 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 21
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 20
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 20
- 239000011574 phosphorus Substances 0.000 claims abstract description 20
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 17
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 16
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 16
- 239000002440 industrial waste Substances 0.000 claims abstract description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 80
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 40
- 239000000203 mixture Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000006396 nitration reaction Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 11
- 238000006386 neutralization reaction Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000012467 final product Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims 1
- 239000000292 calcium oxide Substances 0.000 claims 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 1
- FYHXNYLLNIKZMR-UHFFFAOYSA-N calcium;carbonic acid Chemical compound [Ca].OC(O)=O FYHXNYLLNIKZMR-UHFFFAOYSA-N 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 16
- 229940062672 calcium dihydrogen phosphate Drugs 0.000 description 8
- 239000000047 product Substances 0.000 description 5
- 238000012216 screening Methods 0.000 description 4
- 239000011343 solid material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000003674 animal food additive Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 244000144972 livestock Species 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960005069 calcium Drugs 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- MWKXCSMICWVRGW-UHFFFAOYSA-N calcium;phosphane Chemical compound P.[Ca] MWKXCSMICWVRGW-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000019700 dicalcium phosphate Nutrition 0.000 description 1
- 235000019621 digestibility Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical group C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000020939 nutritional additive Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/328—Defluorination during or after the preparation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of feed-level calcium biphosphate, according to weight meter, it is made up of 20 30 parts of phosphorus ore, 5 15 parts of calcium hydroxide, 5 15 parts of calcium carbonate, 5 15 parts of sulfuric acid, 5 15 parts of industrial waste acid, 26 parts of activated carbon grain.Present invention process is simple, easy to implement and raw material sources are extensive, can shorten the production technology time, energy consumption is low, low cost, industrialization large-scale production is applicable to, with wide market prospects and good economic results in society.
Description
Technical field
The present invention relates to a kind of feed-level calcium biphosphate and preparation method thereof, belong to feed additive production technology neck
Domain.
Background technology
The principal item of feed-grade calcium phosphate salt has tricalcium phosphate, and calcium monohydrogen phosphate, calcium dihydrogen phosphate belong to mineral matter element
Nutritive additive.Wherein, calcium dihydrogen phosphate (MCP) is a kind of excellent high efficiency phosphatic feed additive, phosphorous height,
Water-soluble rate is high, is widely used in the feed addictive of aquiculture animal and livestock and poultry cultivation animal.Because calcium dihydrogen phosphate is water-soluble
Phosphorus content is higher, and content accounts for more than total phosphorus 90wt%, is conducive to absorption of the aquatic livestock to calcium phosphorus, digestibility 90% with
On, excretion is few, the features such as be conducive to environmental protection.At home and abroad find broad application.
At present, both at home and abroad generally using wet processing and dry process production feed-level calcium biphosphate.Wherein wet method work
Skill is that solid material is added in phosphoric acid solution obtained in wet method, and generation is dissolved in the calcium dihydrogen phosphate of water, by vacuum concentration, cold
But after crystallizing, separating out calcium dihydrogen phosphate crystal, re-dry, crushings, screening obtain product, and it is long that the method has a technological process, phosphorus damage
Lose greatly, high energy consumption, investment are big, and production capacity is small, cost is high to wait not enough.Dry process is then using phosphoric acid and C obtained in hot method
The solid materials such as aCO3 react, and after obtaining calcium dihydrogen phosphate slurry, product, this side are obtained by drying, broken, screening etc.
There is the deficiencies such as equipment volume is huge, granularity is small, power consumption is big in method.Therefore, in the prior art, generally existing technological process
Length, high energy consumption, investment be big and the low feature of productivity ratio.
The content of the invention
It is an object of the present invention to provide a kind of feed-level calcium biphosphate and preparation method thereof.The invention can shorten life
Production. art time, low cost.
Technical scheme：A kind of feed-level calcium biphosphate, according to weight meter, by phosphorus ore 20-30 parts, hydroxide
Calcium 5-15 parts, calcium carbonate 5-15 parts, sulfuric acid 5-15 parts, industrial waste acid 5-15 parts, activated carbon grain 2-6 parts of composition.
Foregoing feed-level calcium biphosphate, according to weight meter, by 25 parts of phosphorus ore, 10 parts of calcium hydroxide, 10 parts of calcium carbonate,
10 parts of sulfuric acid, 10 parts of industry spent acid, 4 parts of compositions of activated carbon grain.
Foregoing feed-level calcium biphosphate and preparation method thereof, includes following steps：
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）By obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 2-6 hours, phosphoric acid solution B is obtained；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 2-4kg, defluorinate removal of impurities is carried out, 3-5 is stood small
When, clean phosphoric acid solution C is obtained；
（4）Calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating are concentrated, filter, clean, dried, obtained final product.
Foregoing feed-level calcium biphosphate and preparation method thereof, includes following steps：
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）Obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 4 hours are obtained phosphoric acid solution B；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 3kg, defluorinate removal of impurities is carried out, 4 hours are stood, system
Obtain phosphoric acid solution C totally；
（4）By calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating, concentration, filtering, cleaning, drying, obtain final product.
It is in foregoing feed-level calcium biphosphate and preparation method thereof, the calcium carbonate and obtained phosphoric acid solution C and anti-
The heating-up temperature answered is 40-60 DEG C.
Beneficial effects of the present invention：Compared with prior art, feed of the invention has advantages below：
1. calcium hydroxide used in the present invention and calcium carbonate greatly reduce the production time as raw material, increase economic efficiency.
2. present invention process is simple, it is easy to implement, and raw material sources are extensively, is applicable to industrialization large-scale production,
With wide market prospects and good economic results in society.
3. the spent acid used by the present invention replaces phosphoric acid commonly used in the prior art, cheap, and obtained fertilizer efficiency
Height, its pH value is in faintly acid, with improvement basic soil effect.
4. the obtained fertilizer of the present invention can both be administered alone or can be used in mixed way with other nutrients, if making with nitrogenous fertilizer mixing
With with certain nitrogen fixation.
Experimental example production time, pH value and production cost
1 process and material therefor
1.1 wet processings：Method（Solid material is added in phosphoric acid solution obtained in wet method, generation is dissolved in the biphosphate of water
Calcium, by the way that after vacuum concentration, crystallisation by cooling, precipitation calcium dihydrogen phosphate crystal, re-dry, crushing, screening obtain product）；
Dry process：Method（Reacted using solid materials such as phosphoric acid obtained in hot method and CaCO3, obtain calcium dihydrogen phosphate material
After slurry, product is obtained by drying, broken, screening etc.）；
Preparation method of the invention：It is prepared by embodiment 2；
1.2 test methods：Production time, pH value and production cost are observed by testing production tracing.
1.3 observation statistical indicators
（1）Production for production time, pH value and production cost respectively carries out Experimental Comparison, and production time, PH are counted respectively
Value and production cost.
（2）Production to production time, pH value and production cost carries out five Experimental Comparisons（Average）.
1.4 results
Result see the table below 1.
The production time of table 1, pH value and production cost statistics table（The product of production identical weight packaging）
| Technique and preparation method | Production time（My god） | PH value | Production cost（Unit） |
| Wet processing | 20 | 5 | 60 |
| Dry process | 21 | 4 | 65 |
| Preparation method of the invention | 16 | 3 | 55 |
More than experiment understand, the present invention compared with prior art, with speed of production is fast, low cost and other advantages.
Invention is further described with reference to embodiment, but is not intended as the foundation to present invention limitation.
Specific embodiment
Embodiments of the invention 1.
A kind of feed-level calcium biphosphate, according to weight meter, by phosphorus ore 20-30 parts, calcium hydroxide 5-15 parts, calcium carbonate 5-
15 parts, sulfuric acid 5-15 parts, industrial waste acid 5-15 parts, activated carbon grain 2-6 parts of composition.
Described feed-level calcium biphosphate and preparation method thereof, includes following steps：
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）By obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 2-6 hours, phosphoric acid solution B is obtained；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 2-4kg, defluorinate removal of impurities is carried out, 3-5 is stood small
When, clean phosphoric acid solution C is obtained；
（4）Calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating are concentrated, filter, clean, dried, obtained final product.
Embodiments of the invention 2.
A kind of feed-level calcium biphosphate, according to weight meter, by 25 parts of phosphorus ore, 10 parts of calcium hydroxide, 10 parts of calcium carbonate, sulphur
10 parts of acid, 10 parts of industry spent acid, 4 parts of compositions of activated carbon grain.
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）Obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 4 hours are obtained phosphoric acid solution B；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 3kg, defluorinate removal of impurities is carried out, 4 hours are stood, system
Obtain phosphoric acid solution C totally；
（4）By calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating, concentration, filtering, cleaning, drying, obtain final product.
Embodiments of the invention 3.
A kind of feed-level calcium biphosphate, according to weight meter, by 20 parts of phosphorus ore, 5 parts of calcium hydroxide, 5 parts of calcium carbonate, sulfuric acid
5 parts, 5 parts of industry spent acid, 2 parts of activated carbon grain composition.
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）Obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 2 hours are obtained phosphoric acid solution B；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 2kg, defluorinate removal of impurities is carried out, 3 hours are stood, system
Obtain phosphoric acid solution C totally；
（4）By calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating, concentration, filtering, cleaning, drying, obtain final product.
Embodiments of the invention 4.
A kind of feed-level calcium biphosphate, according to weight meter, by 30 parts of phosphorus ore, 15 parts of calcium hydroxide, 15 parts of calcium carbonate, sulphur
15 parts of acid, 15 parts of industry spent acid, 6 parts of compositions of activated carbon grain.
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）Obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 6 hours are obtained phosphoric acid solution B；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 4kg, defluorinate removal of impurities is carried out, 5 hours are stood, system
Obtain phosphoric acid solution C totally；
（4）By calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating, concentration, filtering, cleaning, drying, obtain final product.
The calcium carbonate is 40-60 DEG C with the heating-up temperature of obtained phosphoric acid solution C neutralization reactions.
Claims (5)
1. a kind of feed-level calcium biphosphate, it is characterised in that：According to weight meter, by phosphorus ore 20-30 parts, calcium hydroxide 5-15
Part, calcium carbonate 5-15 parts, sulfuric acid 5-15 parts, industrial waste acid 5-15 parts, activated carbon grain 2-6 parts of composition.
2. feed-level calcium biphosphate according to claim 1, it is characterised in that：According to weight meter, by 25 parts of phosphorus ore, hydrogen
10 parts of calcium oxide, 10 parts of calcium carbonate, 10 parts of sulfuric acid, 10 parts of industry spent acid, 4 parts of compositions of activated carbon grain.
3. a kind of feed-level calcium biphosphate as claimed in claim 1 or 2 and preparation method thereof, it is characterised in that：Include
Following steps：
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）By obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 2-6 hours, phosphoric acid solution B is obtained；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 2-4kg, defluorinate removal of impurities is carried out, 3-5 is stood small
When, clean phosphoric acid solution C is obtained；
（4）Calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating are concentrated, filter, clean, dried, obtained final product.
4. feed-level calcium biphosphate according to claim 3 and preparation method thereof, it is characterised in that：Include following step
Suddenly：
（1）Sulfuric acid and spent acid are mixed to prepare nitration mixture A；
（2）Obtained nitration mixture A and phosphorus ore hybrid reaction, heating stirring 4 hours are obtained phosphoric acid solution B；
（3）Obtained phosphoric acid solution B is added into activated carbon grain, calcium hydroxide, water 3kg, defluorinate removal of impurities is carried out, 4 hours are stood, system
Obtain phosphoric acid solution C totally；
（4）By calcium carbonate and obtained phosphoric acid solution C neutralization reactions, heating, concentration, filtering, cleaning, drying, obtain final product.
5. feed-level calcium biphosphate according to claim 3 or 4 and preparation method thereof, it is characterised in that：The carbonic acid
Calcium is 40-60 DEG C with the heating-up temperature of obtained phosphoric acid solution C neutralization reactions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611173002.6A CN106853962A (en) | 2016-12-18 | 2016-12-18 | A kind of feed-level calcium biphosphate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611173002.6A CN106853962A (en) | 2016-12-18 | 2016-12-18 | A kind of feed-level calcium biphosphate and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106853962A true CN106853962A (en) | 2017-06-16 |
Family
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108163826A (en) * | 2018-01-12 | 2018-06-15 | 南京牧奇亚生物科技有限公司 | Feed-grade calcium phosphate salt and preparation method thereof |
| CN110483125A (en) * | 2019-08-02 | 2019-11-22 | 史丹利化肥当阳有限公司 | Utilize the method for waste phosphoric acid production S-based compound fertilizer raw material |
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|---|---|---|---|---|
| CN1107661A (en) * | 1994-03-01 | 1995-09-06 | 云南精细化工公司 | Catalytic technology for processing calcium hydrogen phosphate as feed |
| CN1153137A (en) * | 1996-08-23 | 1997-07-02 | 四川绵竹龙蟒矿物质饲料集团有限公司 | Production method of toothpaste grade calcium hydrophosphate |
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| CN102815681A (en) * | 2012-06-21 | 2012-12-12 | 中化云龙有限公司 | Method for producing feed-grade calcium dihydrogen phosphate from wet-process phosphoric acid |
| CN103303886A (en) * | 2013-06-28 | 2013-09-18 | 山东鲁北企业集团总公司 | Novel method for producing industrial phosphoric acid by purification with wet process phosphoric acid |
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| CN1107661A (en) * | 1994-03-01 | 1995-09-06 | 云南精细化工公司 | Catalytic technology for processing calcium hydrogen phosphate as feed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108163826A (en) * | 2018-01-12 | 2018-06-15 | 南京牧奇亚生物科技有限公司 | Feed-grade calcium phosphate salt and preparation method thereof |
| CN110483125A (en) * | 2019-08-02 | 2019-11-22 | 史丹利化肥当阳有限公司 | Utilize the method for waste phosphoric acid production S-based compound fertilizer raw material |
| CN110483125B (en) * | 2019-08-02 | 2022-03-04 | 史丹利化肥当阳有限公司 | Method for producing raw material for sulfur-based compound fertilizer by using waste phosphoric acid |
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Application publication date: 20170616 |