CN1070157C - Producing ammonium phosphate from ammonium carbonate - Google Patents
Producing ammonium phosphate from ammonium carbonate Download PDFInfo
- Publication number
- CN1070157C CN1070157C CN97117292A CN97117292A CN1070157C CN 1070157 C CN1070157 C CN 1070157C CN 97117292 A CN97117292 A CN 97117292A CN 97117292 A CN97117292 A CN 97117292A CN 1070157 C CN1070157 C CN 1070157C
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- China
- Prior art keywords
- ammonium
- phosphate
- reaction
- product
- ammonia
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Ammonium bicarbonate with low nitrogen content and easy decomposition is a nitrogenous fertilizer with the maximum production capacity in China. The present invention relates to a method for producing ammonium phosphate of a phosphorus-nitrogen compound fertilizer with high concentration by changing the production of ammonium bicarbonate. The present invention is characterized in that an ammonium carbonate solution of the intermediate product for producing ammonium bicarbonate and phosphogypsum generated in the technological process are used as raw materials, the product of acidolysis of phosphate rock powder is calcium dihydrogenphoshate and is not phosphoric acid in the traditional method, thereby, 30% of consumption of sulphuric acid is saved, and the production cost is obviously reduced. The side product is ammonium sulfate and enhances the economic benefit, so the present invention has the advantages of simple technological process, easy implementation and obvious entire economic benefit.
Description
The carbon ammonium refers to bicarbonate of ammonia, and the phosphorus ammonium refers to monoammonium phosphate or diammonium phosphate, and the present invention is that a kind of bicarbonate of ammonia of changing products is the method for monoammonium phosphate or diammonium phosphate.
Bicarbonate of ammonia is the nitrogenous fertilizer of China's output maximum, and nitrogen content is low and be easy to decomposition, and generally unsalable in recent years, the bicarbonate of ammonia of changing products is that high concentration phosphorus nitrogenous fertilizer composite fertilizer's monoammonium phosphate salable or diammonium phosphate are significant.Bicarbonate of ammonia is changed products to the existing technology of monoammonium phosphate or diammonium phosphate is very simple, get final product, but this method is infeasible for making agricultural monoammonium phosphate or diammonium phosphate economically with the bicarbonate of ammonia neutralising phosphoric acid.
Purpose of the present invention, being to provide a kind of technological process bicarbonate of ammonia of changing products comparatively simple and that have a higher economic benefit is the method for monoammonium phosphate or diammonium phosphate.
Design of the present invention is: intermediate product sal volatile and phosphogypsum reaction to produce bicarbonate of ammonia, separate lime carbonate and get ammoniumsulphate soln, through concentrate crystallisation by cooling separate pair product ammonium sulfate.Adding sulfuric acid and ground phosphate rock react behind the mother liquor dilute with water of sulfur acid ammonium, and reaction finishes the back separation of phosphogypsum and gets monoammonium phosphate solution, promptly get diammonium phosphate solution with ammonia or volatile salt neutralization, can make monoammonium phosphate or diammonium phosphate product respectively.
Concrete technology is as follows:
(1) make ammonium sulfate: with intermediate product sal volatile in the bicarbonate of ammonia production process and phosphogypsum reaction, reaction formula is as follows:
(2) make monoammonium phosphate or diammonium phosphate:
The mother liquor of sulfur acid ammonium adds sulfuric acid and ground phosphate rock and reacts, and at first is the sulfuric acid decomposing rock phosphate with hydrogen, and reaction formula is as follows:
Sulfur acid ammonium mother liquor should suitably add water, sulfuric acid is added after, sulfur acid concentration is 20-30%, stirs to add sulfuric acid and ground phosphate rock down, reaction consumption mol ratio is ammonium sulfate: sulfuric acid: contained Ca in the ground phosphate rock
5F (PO
4)
3=1.5: 3.5: 1, be reflected under room temperature and the stirring condition and carry out, react when the pH value of material no longer raises and finish.Reaction finishes to get monoammonium phosphate solution after the separation of phosphogypsum of back, gets monoammonium phosphate product through concentrating granulating and drying, with ammonia or volatile salt neutralization, should control final pH value and be not more than 8 after the monoammonium phosphate solution concentration, gets carbonic acid two ammonium products through granulating and drying again.
Accompanying drawing is the whole process flow signal.
Further narrate embodiments of the invention below in conjunction with accompanying drawing:
In reactor, add the sulfur acid ammonium mother liquor 14 that comes by separation 9, add entry 11 and stir adding sulfuric acid 12 down, with ground phosphate rock 13, react 4, reaction goes to separate 2 after finishing, get monoammonium phosphate solution 15, go to concentrate 3, can directly go granulating and drying 6 to make monoammonium phosphate 17 after concentrating, also can through in and 5, neutralize with ammonia or volatile salt 16, go granulating and drying 6 to make diammonium phosphate 18 after the neutralization, by separating 2 gained phosphogypsums, 20 dereactions 1 and sal volatile 19 reactions, react end after separate 7,21 dischargings of waste material lime carbonate, ammoniumsulphate soln 22 goes to concentrate, cooling, crystallization 8, must pay product ammonium sulfate 10 through separating 9 again, sulfur acid ammonium mother liquor 14 dereactions 4.
Technological process of the present invention is fairly simple, and all normal-temperature reaction is implemented easily.Intermediate product sal volatile with bicarbonate of ammonia is a raw material, and utilized the waste material phosphogypsum, thereby reduced raw materials cost, the product of phosphate rock-sulfuric acid powder is a monocalcium phosphate, rather than the phosphoric acid of traditional method, thereby saved about 30% sulfuric acid, and further reduced production cost, pay product ammonium sulfate and then significantly improved benefit.The present invention is not only the labile carbon ammonium of unsalable poor efficiency, changes products to be salable and phosphorus nitrogen composite fertilizer phosphorus ammonium efficiently, and high economic benefit is arranged, and is also significant for the fertilizer structure of optimizing China.
Claims (1)
1, a kind of bicarbonate of ammonia of changing products is the method for monoammonium phosphate or diammonium phosphate, it is characterized in that intermediate product sal volatile and phosphogypsum reaction to produce bicarbonate of ammonia, reaction formula:
, reaction consumption mol ratio is 1 with the mole number of volatile salt, then contained CaSO in the phosphogypsum
4Mole number be no less than 1, reaction needs at 30-40 ℃, and carry out under the stirring condition, last end in 1-1.5 hour, after reaction finishes, separate lime carbonate and get ammonium sulfate liquor, through concentrating, cooling, crystallization, separating, must pay product ammonium sulfate, gained sulfur acid ammonium mother liquor adds sulfuric acid and ground phosphate rock and reacts reaction formula:
, reaction consumption mol ratio is ammonium sulfate: sulfuric acid: contained Ca in the ground phosphate rock
5F (PO
4)
3=1.5: 3.5: 1, be reflected under room temperature and the stirring condition and carry out, react when the pH value that proceeds to material no longer raises and finish, gained monoammonium phosphate solution after separation of phosphogypsum, make monoammonium phosphate product again, monoammonium phosphate solution is controlled final pH value and is not more than 8 with ammonia or volatile salt neutralization, can make diammonium phosphate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97117292A CN1070157C (en) | 1997-09-23 | 1997-09-23 | Producing ammonium phosphate from ammonium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97117292A CN1070157C (en) | 1997-09-23 | 1997-09-23 | Producing ammonium phosphate from ammonium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1212247A CN1212247A (en) | 1999-03-31 |
| CN1070157C true CN1070157C (en) | 2001-08-29 |
Family
ID=5174428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97117292A Expired - Fee Related CN1070157C (en) | 1997-09-23 | 1997-09-23 | Producing ammonium phosphate from ammonium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1070157C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086131A (en) * | 2010-11-23 | 2011-06-08 | 瓮福（集团）有限责任公司 | Method for co-producing diammonium phosphate by powdery monoammonium phosphate production device |
| CN102616811B (en) * | 2012-04-12 | 2013-09-11 | 瓮福（集团）有限责任公司 | Method for controlling pH (potential of hydrogen) of ammonium sulphate solution prepared by phosphogypsum |
| CN103664296B (en) * | 2013-12-16 | 2014-11-12 | 瓮福（集团）有限责任公司 | Method for regulating nutrients in diammonium phosphate product |
| RU2626947C1 (en) * | 2016-03-03 | 2017-08-02 | Акционерное общество "Минерально-химическая компания "ЕвроХим" | Phosphorus-potassuim-nitrogen-containing npk-fertiliser and method for producing granulated phosphorus-potassuim-nitrogen-containing npk-fertiliser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054964A (en) * | 1990-09-12 | 1991-10-02 | 李小永 | Process for producing monoammonium phosphate from ammonium bicarbonate |
-
1997
- 1997-09-23 CN CN97117292A patent/CN1070157C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054964A (en) * | 1990-09-12 | 1991-10-02 | 李小永 | Process for producing monoammonium phosphate from ammonium bicarbonate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1212247A (en) | 1999-03-31 |
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