Process for the preparation of purified phosphoric solutions fro

Details Process for the preparation of purified phosphoric solutions fro Process for the preparation of purified phosphoric solutions fro

1976-11-15

1978-10-03

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423309, 423310, 423313, C01B 2516, C01B 1516, C01B 2526

Patent

active

041184629

ABSTRACT:
Process for the preparation of a purified solution of phosphoric acid, which may be partially neutralized, from wet process phosphoric acid, by liquid-liquid extraction by means of a substantially water-immiscible organic solvent. The phosphoric acid is treated in the selected solvent, preferably isobutyl alcohol, in the presence of sulphuric acid, by means of an aqueous solution containing phosphate ions and calcium ions in solution, the sulphate ions are precipitated in the form of calcium sulphate, and suspended in said aqueous solution which is separated from the phosphoric solution. The process is advantageously employed for the continuous preparation of concentrated solutions of monosodium phosphate.

REFERENCES:
patent: 1857470 (1932-05-01), Milligan
patent: 3607029 (1971-09-01), Goret et al.
patent: 3767769 (1973-10-01), Winand et al.
patent: 4018869 (1977-04-01), Beltz et al.

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