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:
Nov. 08, 2022
Filed:
Jan. 22, 2019
Applicant:
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Inventors:
Yutaka Gojo, Tokyo, JP;
Takahide Yoshida, Tokyo, JP;
Assignee:
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 65/02 (2006.01); C02F 1/44 (2006.01); C02F 103/08 (2006.01); B01D 61/58 (2006.01);
U.S. Cl.
CPC ...
B01D 65/02 (2013.01); B01D 61/58 (2013.01); C02F 1/441 (2013.01); C02F 1/444 (2013.01); B01D 2321/162 (2013.01); B01D 2321/168 (2013.01); C02F 2103/08 (2013.01); C02F 2303/16 (2013.01);
Abstract
This method, for regenerating a member used in a device that treats seawater, involves a cleaning step for removing deposits from the member. In the cleaning step, a first chemical solution containing an acid other than hydroxydicarboxylic acid and a second chemical solution containing hydrogen peroxide, a heavy metal compound and hydroxydicarboxylic acid are used.