Phosphoric acid purification

Details Phosphoric acid purification Phosphoric acid purification

1974-05-07

1976-08-31

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423 63, C01B 2516

Patent

active

039781968

ABSTRACT:
Pure phosphoric acid is prepared from crude wet process phosphoric acid which contains pentavalent vanadium compounds by first extracting the crude acid with an alcohol of limited water solubility and then washing the extracted phosphoric acid solution with aqueous phosphoric acid, in the presence of an agent for reducing the pentavalent vanadium compounds.

REFERENCES:
patent: 1981145 (1934-11-01), Keller
patent: 2211119 (1960-08-01), Hixson et al.
patent: 3186793 (1965-06-01), Gillis et al.
patent: 3348906 (1967-10-01), Hendrickson et al.
patent: 3372982 (1968-03-01), Hazen
patent: 3437454 (1969-04-01), Shaw
patent: 3449074 (1969-06-01), Schertzer
patent: 3479139 (1969-11-01), Koerner
patent: 3734696 (1973-05-01), Lucid et al.

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