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. 13, 2015
Filed:
Sep. 10, 2010
Chunqing Liu, Schaumburg, IL (US);
Raisa Minkov, Skokie, IL (US);
Man-wing Tang, Cerritos, CA (US);
Lubo Zhou, Inverness, IL (US);
Jeffery C. Bricker, Buffalo Grove, IL (US);
Chunqing Liu, Schaumburg, IL (US);
Raisa Minkov, Skokie, IL (US);
Man-Wing Tang, Cerritos, CA (US);
Lubo Zhou, Inverness, IL (US);
Jeffery C. Bricker, Buffalo Grove, IL (US);
UOP LLC, Des Plaine, IL (US);
Abstract
The present invention discloses a blends of an aromatic polyimide polymer and a polymer containing aromatic sulfonic acid groups that can be converted into polybenzoxazole (PBO) membranes for gas, vapor, and liquid separations. The PBO membranes that were prepared by thermal treating aromatic polyimide membranes containing between 0.05 and 20 wt-% of a poly(styrene sulfonic acid) polymer. These polymers showed up to 95% improvement in selectivity for CO/CHand H/CHseparations compared to PBO membranes prepared from corresponding aromatic polyimide membranes without a poly(styrene sulfonic acid) polymer.