METHOD OF PRODUCTION OF MONOPOTASSIUM PHOSPHATE Russian patent published in 2005 - IPC

FIELD: medicine and microbiology; agriculture and food industry; methods of production of monopotassium phosphate.

SUBSTANCE: the invention is pertaining to production of monopotassium phosphate used as fertilizers, food additives, and also in medicine and microbiology. The method provides for neutralization of phosphoric acid by potassium carbonate up to pH not above 4.5 at the heightened temperature, separation of the produced admixture by filtration with the subsequent crystallization and separation of the finished product at cooling. Potassium carbonate take in the form of a water solution with the concentration necessary for production in the neutralized mixture of 23-30 % monopotassium phosphate. The neutralization process is conducted at the temperature of 70-78°C, and the mother liquor after separation of the finished product at the stage of a crystallization return into the process on the stage of dissolution of potassium carbonate. Reaction of the neutralization conduct up to pH = 3.8-4.5. The technical result is an increase of output of the finished product up to 95-97 % and creation of the wasteless production due to utilization of a mother liquor in the process.

EFFECT: the invention ensures increased output of the finished product up to 95-97 %, creation of the wasteless production due to utilization of a mother liquor in the process.

2 cl, 3 ex