Process for removal of residual organic matter from purified pho

Details Process for removal of residual organic matter from purified pho Process for removal of residual organic matter from purified pho

1983-05-02

1984-07-03

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321R, C01B 2516

Patent

active

044578997

ABSTRACT:
This invention provides a process for removal of residual organic matter from wet process phosphoric acid purified by solvent extraction with a volatile solvent that comprises contacting said purified phosphoric acid with hydrogen peroxide at a temperature between about 100.degree. C. and about 150.degree. C., for between 1/4 hour and about 4 hours, and using a weight ratio of hydrogen peroxide to phosphoric acid between about 0.001 and about 0.05.

REFERENCES:
patent: 3297401 (1967-01-01), Sakomure et al.
patent: 3410656 (1968-11-01), Bumin et al.
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patent: 3694153 (1972-09-01), Williams et al.
patent: 4044108 (1977-08-01), Kikuchi et al.
patent: 4207307 (1980-06-01), Ishibashi et al.
patent: 4209497 (1980-06-01), Irami et al.
patent: 4233278 (1980-11-01), Korchnak
patent: 4279878 (1981-07-01), Maurer et al.

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