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:
Apr. 12, 2016
Filed:
Sep. 26, 2014
Applicant:
Uop Llc, Des Plaines, IL (US);
Inventors:
Carl W. Liskey, Chicago, IL (US);
Chunqing Liu, Arlington Heights, IL (US);
Michael B. Hamoy, Crystal Lake, IL (US);
Assignee:
UOP LLC, Des Plaines, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 53/22 (2006.01); B01D 71/64 (2006.01); B01D 71/56 (2006.01); B01D 69/12 (2006.01);
U.S. Cl.
CPC ...
B01D 53/228 (2013.01); B01D 69/125 (2013.01); B01D 71/56 (2013.01);
Abstract
Polyimide membranes are provided that provide extremely high permeability. The polyimides do not contain carbonyl or sulfonyl functional groups. These membranes are useful in separating gases including the separation of gas pairs including carbon dioxide/methane, hydrogen/methane and propylene/propane as well as other gas mixtures. The membrane selectivity can be adjusted by exposure to ultraviolet light.