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Stephen J Miller, Curtis L Munson, Sudhir S Kulkarni, David J Hasse: Purification of p-xylene using composite mixed matrix membranes. Chevron U, Medal, Richard J Schulte, December 31, 2002: US06500233 (47 worldwide citation)

Composite membranes capable of separating p-xylene from mixtures including p-xylene and m-xylene, and processes for purifying p-xylene using the membranes, are disclosed. The membranes are polymer membranes with a thickness of between about 10 and 1000 microns that include non-interconnected zeolite ...


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Sudhir S Kulkarni, David J Hasse, David R Corbin, Aspi N Patel: Gas separation membrane with organosilicon-treated molecular sieve. L&apos Air Liquide Societe Anonyme a&apos Directoire et Conseil de Surveillance pour l&apos Etude et l&apos Exploitation des Procedes Georges Claude, Jeffrey C Lew, Linda K Russell, January 21, 2003: US06508860 (41 worldwide citation)

A mixed matrix membrane for gas separations is provided with a nonporous continuous phase of a polymer and a dispersed phase of molecular sieve particles reacted with a monofunctional organosilicon compound. The monofunctional organosilicon compound is characterized by (a) at least one silicon subst ...


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David J Hasse, Sudhir S Kulkarni, David R Corbin, Aspi N Patel: Mixed matrix membranes incorporating chabazite type molecular sieves. L&apos Air Liquide Societe Anonyme pour l&apos Etude et l&apos Exploitation des Procedes Georges Claude, Jeffrey C Law, Linda Russell, September 30, 2003: US06626980 (36 worldwide citation)

A device useful for separating the components of gas mixtures includes a selectively gas permeable mixed matrix membrane of a dispersed phase of chabazite type molecular sieve particles uniformly distributed throughout a continuous phase of a polymer. The membrane can be fabricated by dispersing the ...


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Sudhir S Kulkarni, David J Hasse, Dean W Kratzer: Method of making mixed matrix membranes using electrostatically stabilized suspensions. L Air Liquide Societe Anonyme A Directoire et Conseil de Surveillance pour l Etude et l Exploration des Procedes Georges Claude, Christopher J Cronin, January 13, 2009: US07476636 (3 worldwide citation)

Mixed matrix composite (MMC) membranes with minimal macrovoids and defects are provided by the current invention. MMC Membranes are needed that have minimal macrovoids and defects, provide consistent and good selectivity and permeability performance, provide the mechanical strength required to withs ...


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Edgar S Sanders, Sarang Gadre, Michael D Bennett, Ian C Roman, David J Hasse, Indrasis Mondal: Method and system for membrane-based gas recovery. L Air Liquide Societe Anonyme pour l Etude et l Exploitation des Procedes Georges Claude, Christopher J Cronin, May 21, 2013: US08444749 (1 worldwide citation)

A fast gas is recovered from a feed gas containing a fast gas and at least one slow gas using a gas separation membrane. A controller may control a control valve associated with a partial recycle of a permeate gas from the membrane for combining with the feed gas. A controller may control a control ...


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Sudhir S Kulkarni, David J Hasse: Polyimide based mixed matrix composite membranes. L Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance pour l Etude et l Exploitation des Procedes Georges Claude, Patricia E McQueeney, August 17, 2010: US07776137

A polyimide MMC membrane useful for the production of oxygen-enriched air or nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons or nitrogen, and the separation of helium or hydrogen from various streams. Membranes of polyimide polymers, such as polyimide polymers sold unde ...