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. 20, 2024
Filed:
Sep. 30, 2019
Applicant:
Tokuyama Corporation, Yamaguchi, JP;
Inventors:
Shunsuke Hosaka, Yamaguchi, JP;
Masanari Ishizuki, Yamaguchi, JP;
Assignee:
TOKUYAMA CORPORATION, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 7/50 (2006.01); C11D 7/26 (2006.01); C07C 29/80 (2006.01); C11D 11/00 (2006.01);
U.S. Cl.
CPC ...
C11D 7/261 (2013.01); C07C 29/80 (2013.01); C11D 7/5022 (2013.01); C11D 11/0047 (2013.01);
Abstract
Provided is a high-purity isopropyl alcohol in which the concentration of a C7-12 acetal compound is 100 ppb or less on a mass basis, the concentration of the acetal compound in an accelerated test involving heating for 4 hours at 80° C. in a nitrogen atmosphere is increased by a factor of 30 or less with respect to the value thereof prior to heating, and the concentration of the acetal compound is maintained at a value of 100 ppb or less on a mass basis. Also provided is a method for manufacturing said high-purity isopropyl alcohol.