FIELD: pharmaceuticals.
SUBSTANCE: invention relates to a method of production of diammonium phosphate used as a water-soluble fertilizer. The method of production of water-soluble diammonium phosphate is characterized by the following: purified monoammonium phosphate in presence of a circulating solution of diammonium phosphate and sulfuric acid is dissolved in water at a temperature of 60 to 70°C, the resulting solution is ammoniated to a pH of 7.2 to 7.6, the concentration of sulfate ions is maintained in the range from 60 to 90 g/dm3, the resulting suspension is cooled to a temperature of 40–60°C to obtain a crystalline suspension, the crystals are separated, dried and cooled to a temperature of not more than 30°C.
EFFECT: production of diammonium phosphate with a P2O5 content of 53% and nitrogen 21%.
1 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING MONOAMMONIUM PHOSPHATE | 2023 |
|
RU2812559C1 |
| METHOD OF OBTAINING EDIBLE AMMONIUM PHOSPHATES | 2008 |
|
RU2368567C1 |
| METHOD FOR OBTAINING PURIFIED MONOAMMONIUM PHOSPHATE FROM ONE STRIPPED OFF EXTRACTION PHOSPHORIC ACID | 2021 |
|
RU2759434C1 |
| 0 |
|
SU424849A1 | |
| AMMONIUM PHOSPHATES PRODUCTION | 2013 |
|
RU2632009C2 |
| METHOD OF PRODUCING GRANULAR AMMONIUM PHOSPHATES | 2011 |
|
RU2455228C1 |
| METHOD OF PRODUCTION OF THE FOOD DIAMMONIUM PHOSPHATE FROM THE PURIFIED EXTRACTION PHOSPHORIC ACID | 2004 |
|
RU2277509C1 |
| METHOD OF PURIFYING COKE OVEN GAS FROM AMMONIA BY CIRCULAR PHOSPHATE METHOD | 2017 |
|
RU2645999C1 |
| METHOD OF PREPARING MONOAMMONIUM PHOSPHATE | 0 |
|
SU571434A1 |
| METHOD OF PRODUCING FEED DIAMMONIUM PHOSPHATE | 0 |
|
SU1433951A1 |
