Process for the extractive purification of phosphoric acid conta

Details Process for the extractive purification of phosphoric acid conta Process for the extractive purification of phosphoric acid conta

1975-05-08

1977-04-19

Peters, G. O.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321R, C01B 2516

Patent

active

040188698

ABSTRACT:
A process for the purification of phosphoric acid containing cationic impurities is disclosed wherein there is added to a crude phosphoric acid an organic solvent miscible in all proportions with water and phosphoric acid and thereafter contacting the resulting solution with an inorganic material in aqueous or solid form to effect the preferential passage of the impurities of the crude phosphoric acid/organic solvent solution into an aqueous inorganic phase with phosphoric acid remaining in the organic solvent phase from which purified phosphoric acid is recovered by distillation of the organic solvent.

REFERENCES:
patent: 3684438 (1972-08-01), Gleason
patent: 3764657 (1973-10-01), Frankenfeld et al.
patent: 3862298 (1975-01-01), Beltz et al.
patent: 3872215 (1975-03-01), Cherndon et al.
T-932,002, 3/75, McCullough et al., Purif. of H.sub.3 PO.sub.4.

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