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CHEMISTRY AND CHEMICAL ENGINEERING

CHEMISTRY AND CHEMICAL ENGINEERING

Abstract

The results of researchers on the obtaining of defluoride monocalsiumphosphate using defluorinated and desulphated extraction phosphoric acid obtained from washed fured phosconcentrate and limestone are presented. The data are presented on the effect of partially defluorinated and desulphated extraction phosphoric acid on the chemical composition of the resulting pulp of monocalciumphosphate at a rate of 40-45% for P2O5 acid 95, 100, 105 and 110% of stoichiometry on the formation of monocalciumphosphate. With an increase in the concentration acid, the content of P2O5 increases, depending on the quadbit ox acid, and contein of fluorine does not exceed 0.27%.

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