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:
Oct. 18, 2016
Filed:
Jan. 28, 2013
Applicant:
Arakawa Chemical Industries, Ltd., Osaka-shi, JP;
Inventors:
Assignee:
ARAKAWA CHEMICAL INDUSTRIES, LTD., Osaka-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 209/86 (2006.01); B01D 11/04 (2006.01);
U.S. Cl.
CPC ...
C07C 209/86 (2013.01); B01D 11/0492 (2013.01);
Abstract
The purpose of the present invention is to provide a method for efficiently removing a quaternary salt from an organic solvent. The present invention relates to a method for removing a quaternary salt, the method including: contacting a solution of a quaternary salt in an organic solvent with an aqueous solution containing at least one member selected from the group consisting of (a1) compounds having one or more anionic functional groups and (a2) polymers having at least one member selected from the group consisting of carboxyl group and sulfonic acid group, thereby removing the quaternary salt from the organic solvent.