Solvent purification of wet process phosphoric acid

Details Solvent purification of wet process phosphoric acid Solvent purification of wet process phosphoric acid

1974-02-07

1976-05-11

Yudkoff, Norman

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423320, 423313, B01D 1104, C01B 2522, C01B 2530

Patent

active

039564657

ABSTRACT:
In the purification of wet process phosphoric acid by solvent extraction, there is employed an organic solvent partially miscible with water, e.g. isobutanol. By using such a solvent containing about 40 to 50 % less than the saturation level of dissolvable water, the rate of extraction is improved and the formation of gels is avoided. It is preferred that the temperature during the extraction state be maintained substantially constant.

REFERENCES:
patent: 1838431 (1931-12-01), Milligan
patent: 1857470 (1932-05-01), Milligan
patent: 3298782 (1967-01-01), Archambault
patent: 3366448 (1968-01-01), Martin
patent: 3367738 (1968-02-01), Schallert
patent: 3388967 (1968-06-01), Ramaradhya
patent: 3397955 (1968-08-01), Champ
patent: 3497329 (1970-02-01), Amanrich
patent: 3529932 (1970-09-01), Imoto

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