Clarification of black phosphoric acid with phosphoric acid rins

Details Clarification of black phosphoric acid with phosphoric acid rins Clarification of black phosphoric acid with phosphoric acid rins

1982-09-22

1983-10-25

Gluck, Irwin

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

423265, 423321R, C01B 2516, C05B 1100

Patent

active

044118112

ABSTRACT:
This invention provides a process for clarifying black wet process phosphoric acid that comprises admixing said black phosphoric acid with phosphoric acid rinse water in a weight ratio of rinse water to black acid between about 0.5 and about 5, letting the resultant mixture stand thereby obtaining settled material and supernatant clarified black phosphoric acid, and, when said weight ratio is below about 1 to 1.5, depending on the quality of the black acid being clarified, separating said clarified black phosphoric acid from said settled material.

REFERENCES:
patent: 4044106 (1977-08-01), Fang
patent: 4110422 (1978-08-01), Hill

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