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:
May. 17, 2016
Filed:
Jul. 10, 2012
Applicants:
Kazushige Takahashi, Tokyo, JP;
Hiroshi Sugawara, Tokyo, JP;
Masami Murayama, Tokyo, JP;
Inventors:
Assignee:
ORGANO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 29/76 (2006.01); C07C 29/80 (2006.01); B01D 61/58 (2006.01); B01D 61/36 (2006.01); B01D 61/14 (2006.01);
U.S. Cl.
CPC ...
B01D 61/58 (2013.01); C07C 29/76 (2013.01); C07C 29/80 (2013.01); B01D 61/147 (2013.01); B01D 61/362 (2013.01); B01D 2311/04 (2013.01); B01D 2311/06 (2013.01); B01D 2311/2623 (2013.01); B01D 2311/2669 (2013.01);
Abstract
A method of purifying an alcohol, such as isopropyl alcohol, includes a first ion exchange step of performing ion exchange treatment on an alcohol-containing liquid; a step of performing dehydration treatment using a dehydration membrane on the liquid treated in the first ion exchange step; a distillation step of performing distillation on the dehydration-treated liquid; and a second ion exchange step of further performing ion exchange treatment on the liquid obtained in the distillation step to obtain a purified alcohol.