Process for preparing phosphate salts

Details Process for preparing phosphate salts Process for preparing phosphate salts

1976-07-29

1978-09-05

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423309, 423310, 71 43, C01B 1516, C01B 2526

Patent

active

041121180

ABSTRACT:
Phosphate values can be recovered from an organic extract which is formed by contact of wet process phosphoric acid and a water immiscible solvent, in a process in which the extract is treated with an inorganic base or a dihydrogen phosphate salt to give an acid free solvent and an aqueous solution of phosphoric acid and phosphate salt with a cation to P usually in the 0.1 - 0.5 : 1 region. The aqueous solution represents a concentrated soluble phosphate source for subsequent neutralization and conversion to e.g. tripolyphosphates.

REFERENCES:
patent: 1929443 (1933-10-01), Milligan
patent: 3298782 (1967-01-01), Archambault
patent: 3914382 (1975-10-01), Williams
patent: 3947499 (1976-03-01), Edwards et al.
patent: 4018869 (1977-04-01), Beltz et al.
patent: 4024225 (1977-05-01), Ching

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