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:
Jan. 12, 2016
Filed:
Nov. 27, 2012
Applicant:
Kao Corporation, Tokyo, JP;
Inventors:
Assignee:
KAO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/23 (2006.01); C07C 59/125 (2006.01); C08G 65/324 (2006.01); C11D 1/06 (2006.01); C07C 51/25 (2006.01); B01J 23/644 (2006.01);
U.S. Cl.
CPC ...
C07C 51/25 (2013.01); B01J 23/6447 (2013.01); C07C 51/23 (2013.01); C08G 65/324 (2013.01); C11D 1/06 (2013.01);
Abstract
A method for producing polyoxyalkylene alkyl ether carboxylic acid or a salt thereof includes an oxidation reaction process of oxidizing polyoxyalkylene alkyl ether with oxygen by supplying an oxygen-containing gas to a suspension or a solution that has a depth of 200 mm or more and includes polyoxyalkylene alkyl ether. In the oxidation reaction process, a supply rate of the oxygen-containing gas is reduced in a period in which the conversion is greater than or equal to 50% and less than 70%.