GB410731A - Improvements in the manufacture and production of ammonium salts of phosphoric acid - Google Patents
Improvements in the manufacture and production of ammonium salts of phosphoric acidInfo
- Publication number
- GB410731A GB410731A GB2317332A GB2317332A GB410731A GB 410731 A GB410731 A GB 410731A GB 2317332 A GB2317332 A GB 2317332A GB 2317332 A GB2317332 A GB 2317332A GB 410731 A GB410731 A GB 410731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonium
- phosphate
- mixed
- ammonia
- nitrate solution
- 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.)
- Expired
Links
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
- C01B25/28—Ammonium phosphates
-
- 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
- C01B25/38—Condensed phosphates
- C01B25/40—Polyphosphates
- C01B25/405—Polyphosphates of ammonium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Paper (AREA)
Abstract
Ammonium phosphates or mixed fertilizers containing the same are produced by treating a solution containing phosphoric acid and nitric acid and/or nitrates, especially those of alkali metals or ammonium, with so much ammonia that the phosphoric acid, if necessary after cooling, is mainly or completely separated as triammonium phosphate, which is separated from the nitrate solution and, if desired, converted into mixed fertilizers. The invention is particularly applicable to solutions obtained by decomposing crude phosphate with nitric acid and precipitating calcium with soluble sulphates. The nitrate solution, after removing excess ammonia, may be worked up into solid nitrates or into mixed or complete fertilizers. The triammonium phosphate is preferably worked up into the di- or mono-salt, or a mixture thereof, the ammonia evolved being re-used, and these salts mixed, for example, with part of the ammonium nitrate obtained, and also, if desired, with potassium salts. Thus the triammonium phosphate may be added to a hot ammonium nitrate solution evaporated to a water content of 3--5 per cent. Potassium salts are mixed with the resulting pulp of diammonium phosphate and ammonium nitrate. According to one example, pebble phosphate is decomposed with nitric acid, and ammonium sulphate added to precipitate calcium sulphate. The solution is saturated with ammonia and cooled to-5 DEG C. to separate triammonium phosphate, which is added to part of the concentrated ammonium nitrate solution as described above. The remaining part is caused to solidify with calcium carbonate made by reacting the calcium sulphate with ammonium carbonate.ALSO:Ammonium phosphates or mixed fertilizers containing the same are produced by treating a solution containing phosphoric acid and nitric acid and/or nitrates, especially those of alkali metals or ammonium, with so much ammonia that the phosphoric acid, if necessary after cooling, is mainly or completely separated as triammonium phosphate, which is separated from the nitrate solution and, if desired, converted into mixed fertilizers. The invention is particularly applicable to solutions obtained by decomposing crude phosphate with nitric acid and precipitating calcium with soluble sulphates. The nitrate solution, after removing excess ammonia, may be worked up into solid nitrates or into mixed or complete fertilizers. The triammonium phosphate is preferably worked up into the di- or mono-salt, or a mixture thereof, the ammonia evolved being re-used, and these salts mixed, for example, with part of the ammonium nitrate obtained, and also, if desired, with potassium salts. Thus the triammonium phosphate may be added to a hot ammonium nitrate solution evaporated to a water content of 3-5 per cent. Potassium salts are mixed with the resulting pulp of diammonium phosphate and ammonium nitrate. According to one example, pebble phosphate is decomposed with nitric acid, and ammonium sulphate added to precipitate calcium sulphate. The solution is saturated with ammonia and cooled to -5 DEG C. to separate triammonium phosphate, which is added to part of the concentrated ammonium nitrate solution as described above. The remaining part is caused to solidify with calcium carbonate made by reacting the calcium sulphate with ammonium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2317332A GB410731A (en) | 1932-08-18 | 1932-08-18 | Improvements in the manufacture and production of ammonium salts of phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2317332A GB410731A (en) | 1932-08-18 | 1932-08-18 | Improvements in the manufacture and production of ammonium salts of phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB410731A true GB410731A (en) | 1934-05-24 |
Family
ID=10191335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2317332A Expired GB410731A (en) | 1932-08-18 | 1932-08-18 | Improvements in the manufacture and production of ammonium salts of phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB410731A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115121A1 (en) * | 2007-03-19 | 2008-09-25 | Easymining Sweden Ab | Phosphorus recovery |
| CN114436230A (en) * | 2022-01-29 | 2022-05-06 | 贵州芭田生态工程有限公司 | Process for preparing ammonium phosphate to improve quality of lithium iron phosphate by denitrifying phosphoric acid |
-
1932
- 1932-08-18 GB GB2317332A patent/GB410731A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115121A1 (en) * | 2007-03-19 | 2008-09-25 | Easymining Sweden Ab | Phosphorus recovery |
| AU2008227219B2 (en) * | 2007-03-19 | 2012-08-16 | Easymining Sweden Ab | Phosphorus recovery |
| US8518359B2 (en) | 2007-03-19 | 2013-08-27 | Easymining Sweden Ab | Phosphorus recovery |
| CN114436230A (en) * | 2022-01-29 | 2022-05-06 | 贵州芭田生态工程有限公司 | Process for preparing ammonium phosphate to improve quality of lithium iron phosphate by denitrifying phosphoric acid |
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