Process for making wet-process phosphoric acid

Details Process for making wet-process phosphoric acid Process for making wet-process phosphoric acid

1986-02-05

1987-07-28

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423319, 423320, C01B 2516

Patent

active

046831274

ABSTRACT:
Wet-process phosphoric acid is made by subjecting a phosphate ore to processing treatment with a mineral acid resulting in the formation of a processed suspension. The formation of silicofluorides is obviated by adding, either to the phosphate ore or the processed suspension, a quantity of an aluminum compound soluble in phosphoric acid sufficent for the processed suspension to present an aluminum concentration of 0.3 to 1.0 wgt %, based on P.sub.2 O.sub.5.

REFERENCES:
patent: 4132765 (1979-01-01), Yates

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