GB343701A - Method of treating solutions obtained in leaching phosphate rock with nitric acid and ammonium sulphate - Google Patents
Method of treating solutions obtained in leaching phosphate rock with nitric acid and ammonium sulphateInfo
- Publication number
- GB343701A GB343701A GB2106/30A GB210630A GB343701A GB 343701 A GB343701 A GB 343701A GB 2106/30 A GB2106/30 A GB 2106/30A GB 210630 A GB210630 A GB 210630A GB 343701 A GB343701 A GB 343701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphate
- ammonium
- calcium
- nitrate
- ammonia
- 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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
- C05B11/06—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using nitric acid (nitrophosphates)
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The solution obtained by leaching phosphate rock with nitric acid and ammonium sulphate and removing the calcium sulphate and insoluble impurities, is neutralized with ammonia to a point at which either all mono- or all diammonium phosphate is formed, concentrated by evaporation, and cooled to crystallize the chief portion of said ammonium phosphate, mixed or not with varying proportions of ammonium nitrate, dependent on the degree of evaporation, and the mother liquor, containing chiefly ammonium nitrate, is purified by precipitation of the remaining phosphate, and evaporated to obtain the pure nitrate. If diammonium phosphate is required the solution is first neutralized to give the mono salt, or a mixture thereof with the diammonium salt, and the further quantity of ammonia only added after the solution has been filtered from the precipitated phosphates of calcium, aluminium, iron, and other impurities, and concentrated by evaporation. The mother liquor after crystallization of the phosphate may be treated, preferably at a temperature above 80 DEG C., with a calcium compound such as the nitrate, a little ammonia also being added if mono-ammonium phosphate is present, to precipitate calcium phosphate which may be returned to the leaching process. The ammonium sulphate used in the leaching may be produced from calcium sulphate obtained in the process, by treatment with ammonium carbonate or ammonia and carbon dioxide, and the calcium carbonate formed added to the ammonium nitrate for use as a fertilizer, or part of it converted into calcium nitrate for precipitating the phosphates.ALSO:The solution obtained by leaching phosphate rock with nitric acid and ammonium sulphate, and removing the calcium sulphate and insoluble impurities, is neutralized with ammonia to a point at which either all mono- or all diammonium phosphate is formed, concentrated by evaporation, and cooled to crystallize the chief portion of said ammonium phosphate, mixed or not with varying proportions of ammonium nitrate, dependent on the degree of evaporation, and the mother liquor, containing chiefly ammonium nitrate, is purified by precipitation of the remaining phosphate, and evaporated to obtain the pure nitrate. If diammonium phosphate is required the solution is first neutralized to give the mono salt, or a mixture thereof with the diammonium salt, and the further quantity of ammonia only added after the solution has been filtered from the precipitated phosphates of calcium, aluminium, iron, and other impurities, and concentrated by evaporation. The mother liquor after crystallization of the phosphate may be treated, preferably at a temperature above 80 DEG C., with a calcium compound such as the nitrate, a little ammonia also being added if monoammonium phosphate is present, to precipitate calcium phosphate which may be returned to the leaching process. The ammonium sulphate used in the leaching may be produced from calcium sulphate obtained in the process, by treatment with ammonium carbonate or ammonia and carbon dioxide, and the calcium carbonate formed added to the ammonium nitrate for use as a fertilizer, or part of it converted into calcium nitrate for precipitating the phosphates.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE343701X | 1929-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB343701A true GB343701A (en) | 1931-02-26 |
Family
ID=20308443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2106/30A Expired GB343701A (en) | 1929-11-28 | 1930-01-21 | Method of treating solutions obtained in leaching phosphate rock with nitric acid and ammonium sulphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB343701A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113086957A (en) * | 2021-04-30 | 2021-07-09 | 陕西科原环保节能科技有限公司 | Method for producing ammonium dihydrogen phosphate |
| CN114524684A (en) * | 2022-04-24 | 2022-05-24 | 太原理工大学 | Production process of nitrophosphate fertilizer by freezing method with adjustable nitrogen-phosphorus ratio |
| CN114715966A (en) * | 2022-04-08 | 2022-07-08 | 广州市迈源科技有限公司 | Method for separating and purifying ammonium sulfate and ammonium dihydrogen phosphate in wastewater |
| CN116040596A (en) * | 2022-01-09 | 2023-05-02 | 四川大学 | Comprehensive utilization method of phosphoric acid by wet method with nitric acid method |
-
1930
- 1930-01-21 GB GB2106/30A patent/GB343701A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113086957A (en) * | 2021-04-30 | 2021-07-09 | 陕西科原环保节能科技有限公司 | Method for producing ammonium dihydrogen phosphate |
| CN116040596A (en) * | 2022-01-09 | 2023-05-02 | 四川大学 | Comprehensive utilization method of phosphoric acid by wet method with nitric acid method |
| CN114715966A (en) * | 2022-04-08 | 2022-07-08 | 广州市迈源科技有限公司 | Method for separating and purifying ammonium sulfate and ammonium dihydrogen phosphate in wastewater |
| CN114524684A (en) * | 2022-04-24 | 2022-05-24 | 太原理工大学 | Production process of nitrophosphate fertilizer by freezing method with adjustable nitrogen-phosphorus ratio |
| CN114524684B (en) * | 2022-04-24 | 2022-07-19 | 太原理工大学 | Production process of nitrophosphate fertilizer by freezing method with adjustable nitrogen-phosphorus ratio |
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