The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 1978
Filed:
Apr. 13, 1976
Applicant:
Inventor:
Fernando Ore, Whittier, CA (US);
Assignee:
Occidental Petroleum Corporation, Los Angeles, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4233 / ;
Abstract
A process for the extraction of metallic impurities from an unpurified aqueous phosphoric acid phase by solvent extraction employing an organic extractant phase containing an organic sulfonic acid in its H.sup.+ form. After the extraction step and separation of the organic extractant phase from the aqueous phosphoric acid phase, residual P.sub.2 O.sub.5 values are recovered from the organic extractant phase by washing the organic extractant phase with a wash phase consisting of water or dilute phosphoric acid. The sulfonic acid in the organic extractant phase can be regenerated to its H.sup.+ form with a mineral acid and recycled.