Process for making crude phosphoric acid

Details Process for making crude phosphoric acid Process for making crude phosphoric acid

1987-02-03

1988-10-25

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423220, 423317, 423320, C01B 2516, C01B 1716

Patent

active

047802944

ABSTRACT:
Crude phosphoric acid is made by subjecting crude phosphate ore containing sulfide to processing treatment with a mineral acid in a closed system comprised of a processing reactor, a filtering zone and an off-gas scrubbing zone. To this end, a soluble compound of a metal forming difficultly soluble sulfides in the respective acid medium is added either

REFERENCES:
patent: 2003051 (1935-05-01), Knox
patent: 3511604 (1970-05-01), Lloyd et al.

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