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:
Sep. 21, 2021
Filed:
Feb. 23, 2018
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Akiko Suzuki, Ota, JP;
Asato Kondo, Yokohama, JP;
Takashi Kuboki, Ota, JP;
Shinji Murai, Sagamihara, JP;
Mitsuru Udatsu, Kawasaki, JP;
Toshihiro Imada, Kawasaki, JP;
Yoshihiko Nakano, Yokohama, JP;
Reiko Yoshimura, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Abstract
A carbon dioxide absorbent of an embodiment includes a heterocyclic amine expressed by Formula (1), and the heterocyclic amine having a pKa of any one amino group included in a heterocyclic ring in Formula (1) in a range of 7.0 or more to 8.6 or less and an organic solvent having a boiling point of 150° C. or more at 1 atm. A total mass of the heterocyclic amine and the organic solvent is 70 mass % or more to 100 mass % or less of the carbon dioxide absorbent. Each of Rto Rin Formula (1) is H, oxygen double-bonded with carbon of the heterocyclic ring, CH, OH, or an alkyl chain optionally including a functional group. Xin Formula (1) is H, CH, CO, C(O)OCH, C(O)OCH, C(O)OCH(CH), C(O)OC(CH), C(O)OCH, C(O)CH, or C(O)CH.