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:
Jan. 16, 2024
Filed:
Sep. 09, 2019
Applicant:
Ngk Insulators, Ltd., Nagoya, JP;
Inventors:
Katsuya Shimizu, Nagoya, JP;
Makiko Ichikawa, Nagoya, JP;
Kenji Yajima, Nagoya, JP;
Takeshi Hagio, Inazawa, JP;
Assignee:
NGK INSULATORS, LTD., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 53/22 (2006.01); B01D 63/06 (2006.01); B01D 65/10 (2006.01); B01D 69/10 (2006.01);
U.S. Cl.
CPC ...
B01D 53/228 (2013.01); B01D 63/06 (2013.01); B01D 65/102 (2013.01); B01D 69/10 (2013.01);
Abstract
A method for inspecting a separation membrane module has a sealing step for sealing a gas for inspection on a primary side of zeolite membrane. The dynamic molecular diameter for the gas for inspection is greater than 1.07 times the pore diameter in the zeolite membrane. The gas for inspection has the characteristic of having a rate of reduction for a COgas permeation rate in the zeolite membrane of less than 10% when a separation membrane structure is allowed to stand for 60 minutes in the gas for inspection at 25 degrees C. and 0.1 MPaG.