Class 95/43 - SELECTIVE DIFFUSION OF GASES

Subclass of Class 95 - Gas separation: processes
Definition: Process in which a fluid mixture containing a gas to be
No. of patents: 28
Last issue date: 04/17/2012

Number	Title	Issue Date
8157891	Cross-pleated membrane cartridges, and method and apparatus for making cross-pleated membrane cartridges A membrane cartridge is manufactured by repeatedly folding and joining two strips of membrane to form a cross-pleated cartridge with a stack of openings or fluid passageways configured in an alternating cross-flow arrangement. The cartridge can be modified for other...	04/17/2012
8052775	Process for the preparation of a two-layer metal palladium or palladium alloy composite membrane Process for preparing a two layer metal palladium or palladium alloy composite membrane consisting of a porous substrate support and a palladium or palladium alloy membrane by rinsing/washing and drying the porous substrate support, treating the porous substrate sup...	11/08/2011
7393384	Hydrogen separation using oxygen ion-electron mixed conduction membranes A process for purification of hydrogen from a stream of synthesis gas or other reformate gases is described. The process, generally conducted at temperatures of approximately 800-1000° C., involves the use of a cell in which a mixture of reformate gas and steam are...	07/01/2008
7318854	System and method for selective separation of gaseous mixtures using hollow fibers A system and method for separation of a gas, e.g., carbon dioxide, from a gaseous mixture using a hollow fiber membrane module. The module contains an absorbent solution that is effective in absorbing the gas for an extended period, e.g., eight hours, without regene...	01/15/2008
7316727	High-selectivity supported SAPO membranes SAPO membranes and methods for their preparation and use are described. The SAPO membranes are prepared by contacting at least one surface of a porous membrane support with an aged synthesis gel. A layer of SAPO crystals is formed on at least one surface of the supp...	01/08/2008
7311755	Control of differential strain during heating and cooling of mixed conducting metal oxide membranes Method of operating an oxygen-permeable mixed conducting membrane having an oxidant feed side and a permeate side, which method comprises controlling the differential strain between the oxidant feed side and the permeate side by varying either or both of the oxygen ...	12/25/2007
7285153	Method and equipment for feeding two gases into and out of a multi-channel monolithic structure A method with associated equipment for feeding two gases into and out of a multi-channel monolithic structure. The two gases will normally be gases with different chemical and/or physical properties. The first gas and the second gas are fed by means of a manifold he...	10/23/2007
7169885	Polyimide membranes The present invention deals with a process for treating a polyimide comprising exposing said polyimide to a compound selected from the group consisting of dendrimers, hyperbranched polymers and mixtures thereof. The polyimide may be in the form of a membrane and the...	01/30/2007
7025804	Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes A method of separating or concentrating hydrocarbon-containing gas mixtures such as hydrogen from hydrocarbons, carbon dioxide from hydrocarbons, nitrogen from hydrocarbons, and hydrocarbons from one another using a selectively permeable membrane. The method is well...	04/11/2006
7018445	Polyimide blends for gas separation membranes The present invention provides a selectively gas permeable membrane that has a superior combination of permeability and selectivity. The membrane composition includes a Type 1 copolyimide uniformly blended with a Type 2 copolyimide, which polymers are defined by che...	03/28/2006
7011694	CO-selective membranes containing amino groups Novel compositions suitable for fabrication of CO2-selective membranes are disclosed. In one aspect, the present invention is directed to compositions comprising polyimide/polyamine blends and copolymers, and to compositions comprising interfacially polym...	03/14/2006
6932859	Crosslinked and crosslinkable hollow fiber membrane and method of making same A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide poly...	08/23/2005
6681648	Meniscus membranes for separations Gas separation membranes, especially meniscus-shaped membranes for gas separations are disclosed together with the use of such meniscus-shaped membranes for applications such as thermal gas valves, pre-concentration of a gas stream, and selective pre-scre...	01/27/2004
6656361	Membrane assisted evaporation process and device for brine concentration There is disclosed amembrane assisted evaporation process (MAE) for economically and reliably removing water added to brine. The process comprises using low-grade waste heat and air to evaporate water from diluted salt brines when the water moves across a...	12/02/2003
6649062	Fluid-membrane separation A process for the separation of mixture components uses a supercritical fluid that is fresh to at least one side of a nonporous membrane after which the fluid is either recycled to the opposite side of the membrane or removed from the separation process. ...	11/18/2003
6620472	Laminated resilient flexible barrier membranes The present invention relates to laminated membranes formed by multi-layer processing techniques including alternating layers of thermoplastic urethane and a copolymer of ethylene and vinyl alcohol. The membranes are characterized in that hydrogen bonds a...	09/16/2003
6416676	Deionized water degasification for semiconductor fabrication In microelectronics (semiconductor) processing, pitting and voiding of aluminum and aluminum alloys by deionized (DI) water is prevented. The present method and apparatus degasifies the DI water to remove the dissolved oxygen gas. The oxygen gas concentra...	07/09/2002
6309550	Mass transfer method and apparatus The invention relates to a method for transferring mass between a flow of a first fluid, preferably a gas phase such as a combustion flue gas, and flow of a second fluid, preferably a liquid phase, where the first fluid is contacted with the outer surface...	10/30/2001
5969087	Polyimide, a method for manufacturing the same, a gas separation membrane using the polyimide and a method for manufacturing the same A novel polyimide having a repeating structure unit expressed by the following general formula (1), a method for manufacturing the same, a gas separation membrane using the novel polyimide and the method for manufacturing the same. The gas separation memb...	10/19/1999
5954966	Membrane composition and method of preparation The present invention relates to membranes useful in the separation of water from a solution containing volatile organic compounds and water. The membranes may be used in dehydrating an organic/water mixture to purify an organic when an organic is of inte...	09/21/1999
5922249	Ophthalmic lens production process A method of making an ophthalmic lens including the steps of: preparing a polymerizable composition comprising excessive oxygen content; contacting the polymerizable composition with a gas that is inert or substantially inert to the polymerizable composit...	07/13/1999
5711882	Gas separation membrane module and process A spiral-wound, gas-separation membrane module and a gas-separation process. The module and process provide at least partial counter-current flow between the feed and permeate gas streams without requiring a permeate sweep. The counter-current flow patter...	01/27/1998
5700375	Particle loaded membranes as oxidant scavengers An efficient method removes oxidants from fluids (gases and liquids, particularly air) by means of solid phase extraction or reaction. The solid phase extraction or reaction medium comprises a porous, preferably fibrous, polymeric, membrane or web in whic...	12/23/1997
5670053	Purification of gases from water using reverse osmosis A process for purifying water including removing cations, anions and carbon dioxide and/or ammonia from water feed stream to produce high purity water having a resistivity of greater than 1 megohm-era comprising the steps of providing a water feed stream ...	09/23/1997
5650479	Interfacially polymerized polyester films The present invention concerns a polyester gas separation membrane which is obtained by the interfacial polymerization of benzenetricarbonyl trihalide or benzene tetracarbonyl tetrahalide in a water-insoluble organic solvent in one phase and a variety of ...	07/22/1997
5611931	High temperature fluid separations using ceramic membrane device A high temperature ceramic membrane device for separation of fluids at high temperature, the device comprises: (a) a housing having: (i) an entrance for introducing fluids to the housing to be separated, (ii) an exit for removing fluids after being subjec...	03/18/1997
5266100	Alkyl substituted polyimide, polyamide and polyamide-imide gas separation membranes Novel aromatic polyimide, polyamide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides, polyamides and polyamide-imides are formed from dia...	11/30/1993
5250231	Nuclear fuel with isotopically depleted burnable absorber By using AVLIS or other methods capable of providing a depleted isotopic mixture, troublesome isotopes such as Gd154, Gd156 and Er166 are selectively removed from naturally occurring isotopic mixtures, while avoiding the a...	10/05/1993

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Class 95/43 - SELECTIVE DIFFUSION OF GASES