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. 22, 2022
Filed:
Jun. 08, 2018
Dow Global Technologies Llc, Midland, MI (US);
Georgia Tech Research Corporation, Atlanta, GA (US);
Yu-Han Chu, Beaverton, OR (US);
William J. Koros, Atlanta, GA (US);
Liren Xu, Freeport, TX (US);
Mark K. Brayden, Plaq uemine, LA (US);
Marcos V. Martinez, Freeport, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Georgia Tech Research Corporation, Atlanta, GA (US);
Abstract
A carbon molecular sieve (CMS) membrane having improved separation characteristics for separating olefins from their corresponding paraffins is comprised of carbon with at most trace amounts of sulfur and a group 13 metal. The CMS membrane may be made by pyrolyzing a precursor polymer devoid of sulfur in which the precursor polymer has had a group 13 metal incorporated into it, wherein the metal is in a reduced state. The pyrolyzing for the precursor having the group 13 metal incorporated into it is performed in a nonoxidizing atmosphere and at a heating rate and temperature such that the metal in a reduced state (e.g., covalently bonded to carbon or nitrogen or in the metal state).