Process for making phosphoric acid free from titanium

Details Process for making phosphoric acid free from titanium Process for making phosphoric acid free from titanium

1988-02-05

1989-02-21

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321R, C01B 2516

Patent

active

048063240

ABSTRACT:
Phosphoric acid substantially free from titanium is made from the organic extract obtained by subjecting crude phosphoric acid containing titanium to extractive purification with an organic solvent immiscible or only partially miscible with water. To this end, the organic extract is scrubbed in a scrubbing zone with a stage number of n>4 by introducing the crude extract into stage 1 and scrubbing it countercurrently with an aqueous alkaline solution in one of stages 2 to n-2 and with pure scrubbing water in stage n.

REFERENCES:
patent: 3529932 (1970-09-01), Imoto et al.
patent: 4018869 (1977-04-01), Beltz et al.
patent: 4117092 (1978-09-01), Beltz et al.

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