GB376174A - Method for the production of solid di-ammonium phosphate from impure phosphoric acid - Google Patents
Method for the production of solid di-ammonium phosphate from impure phosphoric acidInfo
- Publication number
- GB376174A GB376174A GB34057/31A GB3405731A GB376174A GB 376174 A GB376174 A GB 376174A GB 34057/31 A GB34057/31 A GB 34057/31A GB 3405731 A GB3405731 A GB 3405731A GB 376174 A GB376174 A GB 376174A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphoric acid
- ammonia
- temperature
- solid
- production
- 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)
- Fertilizers (AREA)
Abstract
In obtaining solid diammonium phosphate by neutralizing phosphoric acid with ammonia in two steps, neutralization to the mono-stage or a little higher, for example, to a pH value of about 5, is so effected that the heat of the reaction is utilized for partial evaporation of the water, a temperature of over 100 DEG C. being obtained. Impurities precipitated, chiefly as phosphates, are removed by filtration or centrifuging, and the monoammonium phosphate solution is further neutralized in a closed vessel, while being stirred and cooled say to 70-80 DEG C. When a pH value of 8 is reached, corresponding to completion of the reaction to the diammonium stage, the solution is sprayed into a current of warm air, with which may be admixed a small quantity of ammonia. The temperature should not rise above 70 DEG C. The dried salt should be quickly cooled to room temperature. The ammonia should be recovered from the drying air by absorption in acid, for example, the phosphoric acid to be converted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE376174X | 1930-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376174A true GB376174A (en) | 1932-07-07 |
Family
ID=20309115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34057/31A Expired GB376174A (en) | 1930-12-09 | 1931-12-08 | Method for the production of solid di-ammonium phosphate from impure phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB376174A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2497672A (en) * | 1945-03-19 | 1950-02-14 | Brush Dev Co | Piezoelectric apparatus |
| US4185075A (en) | 1967-11-20 | 1980-01-22 | Occidental Research and Engineering Ltd. | Phosphoric acid ammoniation apparatus with water quench |
| EP0161704A2 (en) * | 1984-04-18 | 1985-11-21 | ENICHEM AGRICOLTURA S.p.A. | Process for the production of water soluble ammonium phosphates |
-
1931
- 1931-12-08 GB GB34057/31A patent/GB376174A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2497672A (en) * | 1945-03-19 | 1950-02-14 | Brush Dev Co | Piezoelectric apparatus |
| US4185075A (en) | 1967-11-20 | 1980-01-22 | Occidental Research and Engineering Ltd. | Phosphoric acid ammoniation apparatus with water quench |
| EP0161704A2 (en) * | 1984-04-18 | 1985-11-21 | ENICHEM AGRICOLTURA S.p.A. | Process for the production of water soluble ammonium phosphates |
| EP0161704A3 (en) * | 1984-04-18 | 1988-06-22 | Enichem Agricoltura S.P.A. | Process for the production of water soluble ammonium phosphates |
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