Food grade alkali metal phosphates from wet process H.sub.3 PO.s

Details Food grade alkali metal phosphates from wet process H.sub.3 PO.s Food grade alkali metal phosphates from wet process H.sub.3 PO.s

1975-08-14

1976-11-23

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321S, C01B 1516, C01B 2526

Patent

active

039937330

ABSTRACT:
A process for converting wet process phosphoric acid to food grade alkali metal phosphates by a sequence of steps including extraction of the wet process acid, partial neutralization, dilution with water, contact with activated carbon, neutralization to a pH of from about 5 to about 9, contact with activated carbon, contact with insoluble alkaline earth metal phosphate salts and recovery of the dissolved alkali metal phosphate product in solution.

REFERENCES:
patent: 2044940 (1936-06-01), Haag et al.
patent: 2970098 (1961-01-01), Ellis
patent: 3872215 (1975-03-01), Cherdron et al.
Ionics Bulletin, L-2, 1963, p. 3.

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