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Rene Avrillon, Andre Deschamps, Alain Driancourt, Jean Claude Mileo, Eric Robert: Gas separation membrane. Institut Francais du Petrole, Millen White & Zelano, December 10, 1991: US05071452 (60 worldwide citation)

Disclosed is a gas separation membrane, comprising a film with a thickness ranging from 0.05.10.sup.-6 to 20.10.sup.-6 m, at least 90% by mole of which is at least one aromatic polyimide or copolyimide, the recurrent unit of which corresponds to the following formula (I): ##STR1## where A represents ...


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Rene Avrillon, Andre Descamps, Alain Driancort, Jean Claude Mileo, Eric Robert: Gas separation membrane. Institut Francais du Petrole, Millen White & Zelano, December 31, 1991: US05076816 (16 worldwide citation)

A gas separation membrane, comprising a film with a thickness ranging from 0.05-10.sup.-6 to 20.10.sup.-6 m, at least 90% by mole of which is at least one aromatic polyimide or copolyimide, the recurrent unit of which corresponds to the following formula (I): ##STR1## where A represents a tetravalen ...


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Rene Avrillon: Highly selective asymmetric membranes for gas separation. Institut Francais du Petrole, Millen White Zelano & Branigan P C, October 7, 1997: US05674629 (8 worldwide citation)

A highly selective asymmetric membrane for gas separation is provided which comprises rigid aromatic polyimide or copolyimide polymers comprising the monomers diphenyldi(trifluoromethyl)methane 3,4,3',4'-tetracarboxylic acid adianhydride and a monoaromatic metadiamine or a mixture of monoaromatic me ...


4
Rene Avrillon, Daniel Defives: Process for purifying hydrocarbons by adsorption. Institut Francais du Petrole, Millen & White, May 1, 1979: US04152249 (7 worldwide citation)

A hydrocarbon cut is purified by contact with a solid adsorption resin consisting of a porous polycondensate or cross-linked copolymer comprising pyridyl or hydroxy groups and having pores essentially in the range of 6 to 300 Angstroms.


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Rene Avrillon, Daniel Defives: Process for regenerating lubricating oils. Institut Francais du Petrole, Millen & White, August 30, 1977: US04045330 (7 worldwide citation)

Used lubricating oil is contacted with particles of a solid adsorption resin comprising at least 0.1 cc per gram of pores of diameter in the range of 6 to 300 angstroms. The resin is preferably a porous polycondensate or cross-linked copolymer comprising pyridyl or hydroxy groups, for example a poly ...


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Rene Avrillon: Highly selective asymmetric membranes for gas separation and method for the manufacture thereof. Institut Francais du Petrole, Millen White Zelano & Branigan P C, May 27, 1997: US05633039 (3 worldwide citation)

A method for preparing highly selective asymmetric polymer membranes for gas separation is provided wherein the polymer is dissolved in a volatile solvent containing dioxane, and a film or tube extrusion of the polymer solution is formed. Some of the solvent is evaporated and the film or tube is con ...


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Rene Avrillon: Highly selective asymmetric polyimide membranes for gas separation and method for the manufacture thereof. Inst Francais Du Petrole, April 7, 1995: FR2710549-A1

Rigid aromatic, polyimide or copolyimide, highly selective asymmetric gas separation membranes are obtained from diphenyldi(trifluoromethyl)methane 3,4,3',4'-tetracarboxylic acid dianhydride and a monoaromatic metadiamine or a mixture of monoaromatic metadiamines. The membranes are manufactured by a ...


8
Rene Avrillon: Asymmetric membranes of high selectivity for separation of gases and process for the manufacture. Inst Francais Du Petrole, April 7, 1995: FR2710550-A1

Asymmetric membranes for gas separation, made of rigid aromatic polyimides or copolyimides of high selectivity which have as monomers the dianhydride of diphenyldi(trifluoromethyl)methane-3,4,3',4'-tetracarboxylic acid and a monoaromatic meta-diamine or a mixture of monoaromatic meta-diamines. These ...


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