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:
Dec. 16, 2014
Filed:
Feb. 28, 2012
Applicants:
William J. Koros, Atlanta, GA (US);
Meha Rungta, Atlanta, GA (US);
Liren Xu, Atlanta, GA (US);
Inventors:
Assignee:
Georgia Tech Research Corporation, Atlanta, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 53/22 (2006.01); B01D 67/00 (2006.01); B01D 71/02 (2006.01);
U.S. Cl.
CPC ...
B01D 53/228 (2013.01); B01D 67/0067 (2013.01); B01D 71/021 (2013.01); B01D 71/028 (2013.01); B01D 2256/16 (2013.01); B01D 2257/7025 (2013.01); Y02C 20/20 (2013.01); B01D 2323/08 (2013.01);
Abstract
Carbon molecular sieve membranes having desirable selectivity for ethylene/ethane separations are prepared from a 3,3',4,4′-benzophenonetetracarboxylic acid dianhydride 5(6)-amino-1-(4′-aminophenyl)-1,3,3-trimethylindane 4,4-bismaleimidodiphenyl-methane (BTDA-DAPI) precursor solution that is then formed into films or hollow fibers which are pyrolyzed under vacuum or an inert atmosphere to form carbon molecular sieve membranes. Pyrolysis condition variables, including ramp rate, thermal soak time and temperature, are used to optimize the membrane's separation performance.