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. 20, 2020
Filed:
Apr. 30, 2018
Mitsubishi Chemical Corporation, Chiyoda-ku, Tokyo, JP;
Kenichi Kawazuishi, Yokohama, JP;
Masayuki Iwamura, Yokohama, JP;
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
According to the present invention, in separating carbon dioxide by a membrane separation with a separation membrane system using an inorganic separation membrane from a mixed gas containing methane and carbon dioxide, and then by an acid gas removal process using an absorbent, by specifying the suitable range of the carbon dioxide mole fraction at the outlet on the carbon dioxide non-permeation side Xin the membrane separation, which corresponds to an ideal separation factor of the inorganic separation membrane, the proper distribution conditions become feasible. As a result, a method for separating carbon dioxide in which the decrease of the production amount by methane permeation in the membrane separation and the energy loss accompanying the decrease are suppressed, and further the energy consumption in an acid gas removal process using an absorbent, which is a post-process, can be suppressed, is provided.