Extraction process for purification of phosphoric acid

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

1976-05-20

1977-10-11

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2516

Patent

active

040535649

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 observed in the improved solvent extraction process.

REFERENCES:
patent: 3367749 (1968-02-01), Koerner et al.
patent: 3649220 (1972-03-01), Powell et al.
patent: 3694153 (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. Journ. of Chem., vol. 13, No. 1, 2/60, pp. 58 to 66.
Ind. Eng. Chem. Proc. Des. Dev., vol. 11, No. 1, 1972. pp. 122 to 128.
C. & Eng. News, 9/1/75, p. 22.

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