Purification of phosphoric acid

Details Purification of phosphoric acid Purification of phosphoric acid

C - Chemistry, Metallurgy

01

B

23/72

C01B 25/22 (2006.01)

Patent

CA 1041734

S P E C I F I C A T I O N PURIFICATION OF PHOSPHORIC ACID A B S T R A C T Wet process phosphoric acid is purified by extraction with a solvent, e.g. an acyclic pentanone or hexanone and release from the solvent to give a partially purified acid which is further purified by raising the concentration to an H3PO4 content of at least 84.9% and subsequently cooling to produce crystals of H3PO4 1/2H2O. The crystals are separated from the mother liquor and either melted or dissolved in water to produce phosphoric acid of high purity.

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