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. 15, 2024
Filed:
Apr. 01, 2020
Applicant:
Organo Corporation, Tokyo, JP;
Inventors:
Noriko Takada, Tokyo, JP;
Haruo Yokota, Tokyo, JP;
Yui Shioya, Tokyo, JP;
Yasuhiro Yoshimura, Tokyo, JP;
Assignee:
ORGANO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 47/028 (2017.01); B01J 39/19 (2017.01); B01J 41/14 (2006.01); B01J 47/04 (2006.01);
U.S. Cl.
CPC ...
B01J 47/028 (2013.01); B01J 39/19 (2017.01); B01J 41/14 (2013.01); B01J 47/04 (2013.01);
Abstract
A method for purifying an organic solvent has a first treatment of bringing an organic solvent to be treated into contact with an H-type cation exchanger, and a second treatment of bringing a treated liquid from the first treatment into contact with an anion exchanger and an H-type strongly acidic cation exchanger. According to the present application, the provided method and an apparatus for purifying an organic solvent remove metal impurities of both metal species of monovalent and polyvalent metals in the organic solvent.