Phosphate recovery from wet phosphoric acid purification process

Details Phosphate recovery from wet phosphoric acid purification process Phosphate recovery from wet phosphoric acid purification process

1986-08-25

1987-08-04

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423158, 423317, 423320, 210772, C01B 2516

Patent

active

046845127

ABSTRACT:
The invention is a process for recovering phosphorus value from magnesium pyrophosphate containing filter media in the wet superphosphoric acid purification process. The invention comprises treating the filter cake with a salt to remove the adhering phosphoric acid without solubilizing magnesium acid pyrophosphate. The filter cake, after phosphoric acid removal, can be utilized as commercial or technical grade magnesium acid pyrophosphate.

REFERENCES:
patent: 3650686 (1972-03-01), Hudson et al.
patent: 4235854 (1980-11-01), Smith et al.
patent: 4592901 (1986-06-01), Smith et al.

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