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:
Sep. 11, 2012
Filed:
Aug. 16, 2010
Chunqing Liu, Schaumburg, IL (US);
Stephen T. Wilson, Libertyville, IL (US);
David A. Lesch, Hoffman Estates, IL (US);
Chunqing Liu, Schaumburg, IL (US);
Stephen T. Wilson, Libertyville, IL (US);
David A. Lesch, Hoffman Estates, IL (US);
UOP LLC, Des Plaines, IL (US);
Abstract
The present invention discloses microporous aluminophosphate (AlPO) molecular sieve membranes and methods for making and using the same. The microporous AlPOmolecular sieve membranes, particularly small pore microporous AlPO-14 and AlPO-18 molecular sieve membranes, are prepared by three different methods, including in-situ crystallization of a layer of AlPOmolecular sieve crystals on a porous membrane support, coating a layer of polymer-bound AlPOmolecular sieve crystals on a porous membrane support, and a seeding method by in-situ crystallization of a continuous second layer of AlPOmolecular sieve crystals on a seed layer of AlPOmolecular sieve crystals supported on a porous membrane support. The microporous AlPOmolecular sieve membranes have superior thermal and chemical stability, good erosion resistance, high COplasticization resistance, and significantly improved selectivity over polymer membranes for gas and liquid separations, including carbon dioxide/methane (CO/CH), carbon dioxide/nitrogen (CO/N), and hydrogen/methane (H/CH) separations.