Patent ID: 8132678
Filing Date: 2012-03-13
Classification: B01D,H01M,Y02C,Y02E

Abstract:
1. A process for separating at least one gas or liquid from a mixture of gases or liquids comprising providing a polybenzoxazole-based mixed matrix membrane that is permeable to at least one of said gases or liquids wherein said polybenzoxazole-based mixed matrix membrane is prepared by first fabricating a polyimide-based mixed matrix membrane by dispersing molecular sieve particles such as AlPO-14 molecular sieve particles in a continuous aromatic polyimide matrix with pendent hydroxyl groups ortho to the heterocyclic imide nitrogen; and then converting the polyimide-based mixed matrix membrane to a polybenzoxazole-based mixed matrix membrane by applying heat between 300° and 600° C. under inert atmosphere or vacuum; contacting the mixture of gases or liquids to one side of the polybenzoxazole-based mixed matrix membrane to cause said at least one of said gases or liquids to permeate the polybenzoxazole-based mixed matrix membrane and removing from an opposite side of the polybenzoxazole-based mixed matrix membrane a permeate gas or liquid composition comprising a portion of the at least one gas or liquid that permeated the membrane.