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:
May. 07, 1985
Filed:
Feb. 22, 1984
Applicant:
Inventors:
Gale L Hubred, Richmond, CA (US);
Dean A Van Leirsburg, Petaluma, CA (US);
Assignee:
Chevron Research Company, San Francisco, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01G / ;
U.S. Cl.
CPC ...
423 54 ; 423 63 ; 423139 ; 7510 / ;
Abstract
A method of stripping an organic extraction solvent containing quaternary alkyl ammonium complexes. The extraction solvent is contacted with an aqueous stripping solution having at least 75 g/l bicarbonate ion, while maintained at between pH 7 and 9 at a temperature of no more than 50.degree. C.