Extraction process for purification of phosphoric acid

Details Extraction process for purification of phosphoric acid Extraction process for purification of phosphoric acid

1979-10-11

1984-07-10

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2516

Patent

active

RE0316296

ABSTRACT:
Water immiscible organic acid phosphates used in conjunction with water immiscible organic sulfonic acids results in an improved process for the purification of phosphoric acid. An increase in the extraction of ionic metallic impurities and a decrease in the extraction of P.sub.2 O.sub.5 values from the aqueous phosphoric acid phase [is] are observed in the improved solvent extraction process.

REFERENCES:
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patent: 3649220 (1972-03-01), Powell et al.
patent: 3694133 (1972-09-01), Williams et al.
patent: 3872209 (1975-03-01), Hazen et al.
patent: 3903247 (1975-09-01), Blumberg et al.
patent: 3966569 (1976-06-01), Reinhardt et al.
patent: 3970741 (1976-07-01), Pavonet
Austr. Journal of Chem., vol. 13, No. 1, 2/60, pp. 58 to 66.
Ind. Eng. Chem. Proc. Des. Dev., vol. 11, No. 1, 1972, 122 to 128.
C. & Eng. News 9/1/75, p. 22.
Van Dalen et al, "Solvent Extraction and Inclusion Compound Formation with Anonylnaphthalenesulfonic Acid," Proceedings International Solvent Extraction Conference, 1971, pp. 1096-1100.

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