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:
Mar. 27, 1990
Filed:
Aug. 04, 1988
Thomas J Stierman, Santa Rosa, CA (US);
Phillip L Mattison, Santa Rosa, CA (US);
Henkel Research Corporation, Santa Rosa, CA (US);
Abstract
An improvement in the process of extraction of amino acids from aqueous solutions in which the amino acids are extracted with quaternary ammonium extractants. A pretreatment of the amino acid containing aqueous solution with a tertiary amine prior to extraction of the amino acids with the quaternary ammonium extractant, removes some impurities or poisons present therein, leaving the amino acids in the aqueous solution for subsequent extraction with a water insoluble quaternary ammonium extractant. After extraction with the quaternary extractant, the organic phase is stripped of amino acid and the stripped organic is subjected to an acidic scrub before returning to the quaternary extraction stage.