Process for decontaminating phosphoric acid

Details Process for decontaminating phosphoric acid Process for decontaminating phosphoric acid

1985-11-04

1986-12-16

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321S, C01B 2516

Patent

active

046296140

ABSTRACT:
Wet-process phosphoric acid prepurified by liquid/liquid extraction with an organic solvent is decontaminated. To this end, the prepurified acid is first freed from residual extractant, then stripped with steam or hot gas, contacted with a dialkyldithiophosphoric acid ester and a fine particulate adsorbent, and liquid phase material is ultimately treated with steam and hydrogen peroxide.

REFERENCES:
patent: 4285921 (1981-08-01), Mamourian et al.
patent: 4315899 (1982-02-01), Mamourian et al.
patent: 4457899 (1984-07-01), Grotyohann et al.
patent: 4466948 (1984-08-01), Schimmel et al.
patent: 4479924 (1984-10-01), Plessen et al.
patent: 4539192 (1985-09-01), Schimmel et al.

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