1
Arnaud Baudot
Serge Gonzalez, Jacques Vallet, Arnaud Baudot, Helene Rodeschini: Process for membrane separation of linear hydrocarbons within a hydrocarbon mixture. IFP Energies nouvelles, Millen White Zelano & Branigan P C, August 13, 2013: US08506814

The invention relates to a process for membrane separation that makes it possible to separate linear hydrocarbons from branched hydrocarbons. The membrane that is used comprises a dense selective layer that consists of a polymer whose chemical structure contains at least one bis-phenyl-9,9-fluorene ...


2
Okan M Ekiner, Richard A Hayes, Phillip Manos: Novel multicomponent fluid separation membranes. E I du Pont de Nemours and Company, February 4, 1992: US05085676 (124 worldwide citation)

A process for preparing multicomponent gas separation membranes is disclosed. The process involves casting two or more solutions of polymer, and partially removing solvent from the side of the cast polymer that is to form the gas separation layer of the membrane. The membrane is then quenched to fre ...


3
Hoehn Harvey Herbert, Richter John W: Aromatic polyimide, polyester and polyamide separation membranes. E I du Pont de Nemours & Co, August 12, 1975: US3899309 (90 worldwide citation)

Gas separation membranes are made from aromatic polyimides, polyesters and polyamides in which the repeating unit of the main polymer chainA. has at least one rigid divalent subunit, the two main chain single bonds extending from which are not colinear,B. is sterically unable to rotate 360.degree. a ...


4
Jeffrey J Chiou: Composite gas separation membrane having a gutter layer comprising a crosslinked polar phenyl-containing - organopolysiloxane, and method for making the same -. Hoechst Celanese Corporation, Jay M Brown, February 15, 1994: US05286280 (65 worldwide citation)

This invention provides a composite gas separation membrane comprising: (a) a porous polyacrylonitrile structural support material having a polyacrylonitrile surface; (b) a gutter layer coating comprising a crosslinked polar phenyl-containing-organopolysiloxane material on the polyacrylonitrile surf ...


5
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 ...


6
Chunqing Liu, Man Wing Tang, Raisa Serbayeva, Lubo Zhou: High performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes. UOP, Mark Goldberg, March 6, 2012: US08127936 (57 worldwide citation)

In the present invention high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes and methods for making and using these membranes have been developed. The cross-linked polybenzoxazole and polybenzothiazole polymer membranes are prepared by: 1) first synthesizing polyimi ...


7
Chunqing Liu, Man Wing Tang, Raisa Serbayeva, Lubo Zhou: High performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes. UOP, Mark Goldberg, March 6, 2012: US08127937 (57 worldwide citation)

In the present invention high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes and methods for making and using these membranes have been developed. The cross-linked polybenzoxazole and polybenzothiazole polymer membranes are prepared by: 1) first synthesizing polyimi ...


8
Y M Faruq Marikar, Michael M Besso: Process for preparing electrically conductive shaped articles from polybenzimidazoles. Hoechst Celanese, Burns Doane Swecker & Mathis, May 21, 1991: US05017420 (53 worldwide citation)

An electrically conductive shaped article such as a film or fibrous material and a process for preparing the same from a polybenzimidazole shaped article is provided. The polybenzimidazole article is first contacted with cuprous ions to produce a cuprous ion-impregnated material, and subsequently is ...


9
Dieter Behling, Karl Hattenbach, Klaus Ohlrogge, Klaus Victor Peinemann, Jan Wind: Method of removing organic compounds from air/permanent gas mixtures. GKSS Forschungszentrum Geesthacht, Robert W Becker & Associates, February 19, 1991: US04994094 (46 worldwide citation)

A method of removing organic compounds from an air/permanent gas mixture. This mixture, as untreated medium, is conveyed to a first gas separation membrane and is divided into a filtrate gas stream that is concentrated with organic compounds and a retained gas stream that is depleted of organic comp ...


10
Man Wing Tse Tang: Composite gas separation membranes and making thereof. UOP, Thomas K McBride, Eugene I Snyder, December 30, 1997: US05702503 (43 worldwide citation)

A composite membrane made of an asymmetric porous support and an ultrathin layer having a thickness of less than 100 nm is provided. A method of making the membrane and method for carrying out gas separations using the membrane are also provided.