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:
Feb. 07, 2023
Filed:
May. 20, 2019
Applicant:
Tokuyama Corporation, Yamaguchi, JP;
Inventors:
Takafumi Shimoda, Yamaguchi, JP;
Yuki Kikkawa, Yamaguchi, JP;
Takayuki Negishi, Yamaguchi, JP;
Seiji Tono, Yamaguchi, JP;
Assignee:
Tokuyama Corporation, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/66 (2006.01); C11D 7/32 (2006.01); C07C 209/68 (2006.01); C07C 211/63 (2006.01); C11D 11/00 (2006.01); H01L 21/02 (2006.01);
U.S. Cl.
CPC ...
C11D 7/3209 (2013.01); C07C 209/68 (2013.01); C07C 211/63 (2013.01); C11D 11/0047 (2013.01); H01L 21/02057 (2013.01);
Abstract
A method for producing a quaternary alkylammonium hypochlorite solution includes a preparation step of preparing a quaternary alkylammonium hydroxide solution, and a reaction step of bringing the quaternary alkylammonium hydroxide solution into contact with chlorine, wherein a carbon dioxide concentration in a gas phase portion in the reaction step is 100 ppm by volume or less, and pH of a liquid phase portion in the reaction step is 10.5 or more.