Purification of phosphoric acid

Details Purification of phosphoric acid Purification of phosphoric acid

B - Operations, Transporting

01

D

202/56, 23/72

B01D 3/36 (2006.01) C01B 25/18 (2006.01) C01B 25/46 (2006.01)

Patent

CA 1055419

PURIFICATION OF PHOSPHORIC ACID ABSTRACT OF THE DISCLOSURE: 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.

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