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:
Jul. 26, 2016
Filed:
Jun. 08, 2012
Applicants:
Norikazu Fujimoto, Tokyo, JP;
Kyouhei Hattori, Tokyo, JP;
Fumihiko Yamaguchi, Tokyo, JP;
Inventors:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA, Osaka-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 53/14 (2006.01); B01D 53/62 (2006.01); C01B 31/20 (2006.01);
U.S. Cl.
CPC ...
B01D 53/62 (2013.01); B01D 53/1475 (2013.01); B01D 53/1493 (2013.01); C01B 31/20 (2013.01); B01D 53/1425 (2013.01); B01D 2251/50 (2013.01); B01D 2252/204 (2013.01); B01D 2252/504 (2013.01); B01D 2252/606 (2013.01); B01D 2258/0291 (2013.01); Y02C 10/04 (2013.01); Y02C 10/06 (2013.01); Y02P 20/129 (2015.11); Y02P 20/152 (2015.11);
Abstract
The present invention provides a carbon dioxide absorber capable of efficiently and stably removing carbon dioxide in a gas or solution. This carbon dioxide absorber contains an amine compound, a weakly acidic compound and water, the pKb value of the amine compound in an aqueous solution at 30° C. is 4.0 to 7.0, the pKa value of the weakly acidic compound in an aqueous solution at 30° C. is 7.0 to 10.0, and the weakly acidic compound is present in an amount within the range of 0.01 equivalents to 1.50 equivalents with respect to amino groups of the amine compound.