FIELD: inorganic chemistry, chemical technology. SUBSTANCE: invention relates to production of potassium hydrogen phosphate. Method of production of potassium hydrogen phosphate involves neutralization of phosphoric acid with potassium hydroxide in the parent molar ratio K2O/P2O5, = (2.7-3.2):1. Prepared solution is boiled for 60-90 min and then phosphoric acid is added to the filtered off solution up to ratio K2O/P2O5 = (1.96-2.05):1. Before crystallization a saturated solution is kept for 90-120 min and crystallization is carried out at cooling at the rate 4 C/h firstly to temperature 35-40 C and then at the rate 7 C/h to temperature 15-20 C followed by separation of commercial product from a mother liquor by centrifugation. Except for, filtration is carried out by passing a solution through an activated carbon layer. Method provides decrease of impurities and formation of large crystals of ready product. Potassium hydrogen phosphate is used in chemical industry for making pyrophosphate electrolytes of passivation and copper plating and in biochemistry also for preparing buffer solutions, in microorganisms culturing, in biosynthesis of antibiotics and enzymes. EFFECT: improved quality of product, enhanced efficiency of process, increased yield of ready product. 2 cl, 1 tbl, 1 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD OF PRODUCING DISUBSTITUTED POTASSIUM PHOSPHATE | 2015 |
|
RU2597117C1 |
METHOD OF POTASSIUM DIHYDROGEN PHOSPHATE PRODUCING | 2001 |
|
RU2178386C1 |
METHOD OF PURIFICATION OF DRY-PROCESS PHOSPHORIC ACID | 2002 |
|
RU2209178C1 |
METHOD OF PREPARING MONOSUBSTITUTED DIHYDRATE SODIUM PHOSPHATE | 2000 |
|
RU2162440C1 |
METHOD OF PREPARING DODECAHYDRATE SODIUM PHOSPHATE | 2000 |
|
RU2162438C1 |
METHOD OF PREPARING SODIUM PYRO PHOSPHATE | 2000 |
|
RU2162441C1 |
METHOD OF PREPARING DISODIUM PHOSPHATE | 2000 |
|
RU2162439C1 |
METHOD FOR PRODUCTION OF POTASSIUM PHOSPHATES | 1997 |
|
RU2105713C1 |
SODIUM DYHYDROPYROPHOSPHATE PRODUCTION PROCESS | 2001 |
|
RU2181340C1 |
METHOD FOR PREPARING COMPLEX FERTILIZER | 2002 |
|
RU2223933C1 |
Authors
Dates
2002-06-20—Published
2001-06-05—Filed