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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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Okan Max Ekiner, Sudhir S Kulkarni: Process for making hollow fiber mixed matrix membranes. L&apos Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance pour l&apos Etude et l&apos Exploitation des Procedes Georges Claude, Jeffrey C Lew, Linda Russell, December 16, 2003: US06663805 (41 worldwide citation)

Isopycnic or asymmetric mixed matrix hollow fiber membranes for gas separation can be made by a continuous spinning process. Mixed matrix membranes are characterized by a continuous phase of selectively gas permeable polymer in which are uniformly dispersed discrete absorbent particles such as molec ...


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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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Santi Kulprathipanja, Sudhir S Kulkarni: Separation of polar gases from nonpolar gases. UOP, Thomas K McBride, John F Spears Jr, Raymond H Nelson, August 26, 1986: US04608060 (27 worldwide citation)

Polar gases such as hydrogen sulfide, sulfur dioxide and ammonia may be separated from nonpolar gases such as methane, nitrogen, hydrogen or carbon dioxide by passing a mixture of polar and nonpolar gases over the face of a multicomponent membrane at separation conditions. The multicomponent membran ...


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Santi Kulprathipanja, Edward W Funk, Sudhir S Kulkarni, Y Alice Chang: Separation of a monosaccharide with mixed matrix membranes. UOP, Thomas K McBride, John F Spears Jr, Louis A Morris, April 5, 1988: US04735193 (24 worldwide citation)

A process for separating a monosaccharide from an aqueous solution comprising monosaccharides and a second component comprising a polysaccharide. The mixture is contacted with a mixed matrix membrane comprising a adsorbent or molecular sieve material dispersed in an organic polymer in which the mono ...


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Edward W Funk, Sudhir S Kulkarni, Y Alice Chang: Membrane separation of hydrocarbons. UOP, Thomas K McBride, John F Spears Jr, Raymond H Nelson, October 14, 1986: US04617126 (24 worldwide citation)

Mixtures of heavy oils and light hydrocarbons may be separated by passing the mixture over a polymeric membrane which comprises a polymer capable of maintaining its integrity in the presence of hydrocarbon compounds at temperature ranging from about ambient to about 100.degree. C. and pressures rang ...


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Sudhir S Kulkarni, Y Alice Chang, John G Gatsis, Edward W Funk: Membrane separation of hydrocarbons using cycloparaffinic solvents. UOP, Thomas K McBride, John F Spears Jr, Raymond H Nelson, June 14, 1988: US04750990 (7 worldwide citation)

Heavy crude oils which contain metal contaminants such as nickel, vanadium and iron may be separated from light hydrocarbon oils by passing a solution of the crude oil dissolved in a cycloparaffinic hydrocarbon solvent containing from about 5 to about 8 carbon atoms by passing through a polymeric me ...