Purification of phosphoric acid

Details Purification of phosphoric acid Purification of phosphoric acid

1975-07-01

1976-12-07

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2516

Patent

active

039963365

ABSTRACT:
Phosphoric acid is purified. To this end, it is dissolved in an organic solvent completely miscible with water. More particularly, the phosphoric acid is mixed with a solvent having a boiling point higher than that of water or higher than that of the resulting azeotrope; the resulting solution is heated to temperatures between the boiling point of water or the azeotrope and that of the solvent for as long a period as necessary to distillatively free the solution from the bulk of uncombined water therein; and the phosphoric acid solution is separated from residue.

REFERENCES:
patent: 1929441 (1933-10-01), Milligan
patent: 1981145 (1934-11-01), Keller
patent: 3318661 (1967-05-01), Schallert et al.
patent: 3764657 (1973-10-01), Frankenfeld
Ind. & Eng. Chem., Mod. Wet Process Using Solvent Extr, Huaag, 1/61.

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