METHOD OF PROCESSING CALCIUM PHOSPHATE TO PHOSPHORIC ACID AND LIME OR CEMENT Russian patent published in 1995 - IPC

Abstract RU 2051087 C1

FIELD: industry of mineral fertilizers. SUBSTANCE: method involves mixing phosphoric acid phosphate suspension with sulfuric acid during blowing suspension with run-off flue gas followed by settling, filtration or centrifugation of condensed phosphoric acid sulfate suspension, heating with flue gas, mixing calcium sulfate with methane at molar ratio methane sulfate 1:4, not above, obtaining the lime and concentrated sulfur dioxide gas which is processed to sulfuric acid recovered to the process. EFFECT: simplified process, decreased energy and labor input, decreased exhausts in atmosphere. 4 cl, 3 dwg

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RU 2 051 087 C1

Authors

Pastukhov Petr Ivanovich

Dates

1995-12-27—Published

1992-06-16—Filed