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. 18, 2025
Filed:
Jul. 07, 2021
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Junqiang Liu, Freeport, TX (US);
Dean M. Millar, Midland, MI (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 20/20 (2006.01); B01D 53/22 (2006.01); B01D 67/00 (2006.01); B01D 71/02 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C01B 32/306 (2017.01); C01B 32/318 (2017.01);
U.S. Cl.
CPC ...
B01J 20/20 (2013.01); B01D 53/228 (2013.01); B01D 67/0067 (2013.01); B01D 71/021 (2013.01); B01J 20/28033 (2013.01); B01J 20/3078 (2013.01); B01J 20/3085 (2013.01); C01B 32/306 (2017.08); C01B 32/318 (2017.08); B01D 2256/245 (2013.01); B01D 2257/108 (2013.01); B01D 2257/504 (2013.01);
Abstract
A method of forming a carbon molecular sieve membrane includes dissolving a halogenated precursor polymer in a solvent, thereby forming a dissolved halogenated precursor polymer. Homogeneously dehydrohalogenating the dissolved halogenated precursor polymer with an organic amine base to form a partially dehydrohalogenated polymer. Forming a thin film from the partially dehydrohalogenated polymer. Pyrolyzing the thin film to form the carbon molecular sieve membrane.