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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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Jean Claude Mileo, Christian Busson, Claude Dezael, Jean Charles Viltard, Christophe Berat: Process for the extraction of hydrogen sulphide from a gas mixture. Institut Francais du Petrole, Millen White Zelano & Branigan P C, September 23, 1997: US05670123 (7 worldwide citation)

A process for the extraction of hydrogen sulphide from a gas mixture comprises: a step (a) in which the gas mixture is passed into an aqueous acidic solution of copper sulphate under conditions which lead to the formation of copper sulphide; a gas which is highly depleted in hydrogen sulphide and an ...


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