Class / Patent application number | Description | Number of patent applications / Date published |
095050000 | Organic compound permeates barrier | 19 |
20080216649 | Liquid-phase and vapor-phase dehydration of organic/water solutions - Processes for dehydrating an organic/water solution by pervaporation or vapor separation using fluorinated membranes. The processes are particularly useful for treating mixtures containing light organic components, such as ethanol, isopropanol or acetic acid. | 09-11-2008 |
20090277326 | Gas separation processes using membrance with permeate sweep to recover reaction feedstocks - A gas separation process for treating off-gas streams from reaction processes, and reaction processes including such gas separation. The invention involves flowing the off-gas across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, and passing the permeate/sweep gas mixture to the reaction. The process recovers unreacted feedstock that would otherwise be lost in the waste gases in an energy efficient manner. | 11-12-2009 |
20100199840 | HOLLOW-FIBER ELEMENT FOR ORGANIC-VAPOR SEPARATION - A hollow fiber element constituting a separation membrane module for separating an organic vapor is disclosed. At least one end part of a fiber bundle consisting of multiple hollow fiber membranes having a selective permeability is fixed and bound with a tube sheet formed by a cured material of an epoxy resin composition. Herein, a resin component of the epoxy resin composition contains an epoxy compound (A) represented by the following formula (1), an epoxy compound (B) represented by the following formula (2) and an aromatic amine compound (C), and wherein the epoxy compound (A) and the epoxy compound (B) are blended at a proportion in a range from 90:10 to 60:40 by weight; | 08-12-2010 |
20110023710 | LANDFILL GAS PURIFICATION METHOD AND SYSTEM - The present disclosure provides a method for separating and purifying a landfill gas stream. In one embodiment, the method includes a step of collecting a crude landfill gas stream which includes at least methane, carbon dioxide, oxygen, and nitrogen gases. The method also includes a step of separating the crude landfill gas stream into at least an intermediate landfill gas stream and a first waste gas stream using a membrane separation unit, wherein the intermediate landfill gas stream is enriched in methane and depleted in carbon dioxide relative to the crude landfill gas stream. The method further includes a step of separating the intermediate landfill gas stream into at least a final landfill gas stream and a second waste gas stream using a pressure swing adsorption separation unit, wherein the final landfill gas stream is enriched in methane and depleted in carbon dioxide, oxygen, and nitrogen relative to the intermediate landfill gas stream. The first and second waste gas streams are collected to form a fuel composition and the fuel composition is delivered to a generator unit so that the fuel composition may be used to produce electricity. | 02-03-2011 |
20110048229 | SOLVENT-RESISTANT ASYMMETRIC HOLLOW FIBER GAS SEPARATION MEMBRANE, AND METHOD FOR PRODUCTION THEREOF - An asymmetric hollow fiber gas separation membrane obtained by subjecting an asymmetric hollow fiber polyimide membrane to a heat treatment having a maximum temperature of from 350 to 450° C., wherein the asymmetric hollow fiber polyimide membrane is formed with a polyimide essentially having a repeating unit represented by a general formula (1); | 03-03-2011 |
20110094378 | Oxygen Removal From Contaminated Gases - The invention relates to a method for achieving low oxygen levels in a natural gas stream without the use of a catalytic system. In one embodiment, the method comprises: membrane treatment for the removal of the bulk of CO | 04-28-2011 |
20130014643 | FUEL GAS CONDITIONING PROCESS USING GLASSY POLYMER MEMBRANESAANM Lokhandwala; Kaaeid A.AACI FremontAAST CAAACO USAAGP Lokhandwala; Kaaeid A. Fremont CA USAANM WIlliamson; MalihaAACI LivermoreAAST CAAACO USAAGP WIlliamson; Maliha Livermore CA USAANM Joshi; SachinAACI Mountain ViewAAST CAAACO USAAGP Joshi; Sachin Mountain View CA US - Disclosed herein is a process for conditioning natural gas containing C | 01-17-2013 |
20130220119 | Crosslinked Membrane And Polymer For Making Same And Method Of Using Membrane - A composition of and a method of making high performance crosslinked membranes are described. The membranes have a high resistance to plasticization by use of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant membrane exhibits a high permeability of CO | 08-29-2013 |
20130298765 | PROCESS AND APPARATUS FOR REMOVING CONTAMINANTS FROM A GAS STREAM - A gas purification process for treating a gas stream includes supplying the gas stream to at least one membrane unit to produce a permeate stream and a retentate stream. The retentate stream contains a lower concentration of at least one of water, hydrogen sulfide, or carbon dioxide as compared to the gas stream. The retentate stream is supplied to a molecular sieve unit to remove hydrogen sulfide to produce a treated gas product stream. | 11-14-2013 |
20130319229 | ASYMMETRIC GAS SEPARATION MEMBRANE AND METHOD FOR SEPARATING METHANOL FROM MIXED ORGANIC VAPOR USING THE SAME - An asymmetric gas separation membrane made of an aromatic polyimide mainly containing repeating units having an ether bond which is heated at a temperature near a softening point (T | 12-05-2013 |
20130333562 | POLYIMIDE-BASED CARBON MOLECULAR SIEVE MEMBRANE FOR ETHYLENE/ETHANE SEPARATIONS - Carbon molecular sieve membranes having desirable selectivity for ethylene/ethane separations are prepared from a 3,3′,4,4′-benzophenonetetracarboxylic acid dianhydride 5(6)-amino-1-(4′-aminophenyl)-1,3,3-trimethylindane 4,4-bismaleimidodiphenyl-methane (BTDA-DAPI) precursor solution that is then formed into films or hollow fibers which are pyrolyzed under vacuum or an inert atmosphere to form carbon molecular sieve membranes. Pyrolysis condition variables, including ramp rate, thermal soak time and temperature, are used to optimize the membrane's separation performance. | 12-19-2013 |
20140000454 | Carbon Molecular Sieve Membrane (CMSM) Performance Tuning By Dual Temperature Secondary Oxygen Doping (DTSOD) | 01-02-2014 |
20140165829 | FUEL GAS CONDITIONING USING MEMBRANE SEPARATION ASSEMBLIES - A method for conditioning natural gas into a fuel gas suitable for use as fuel to an engine includes delivering a natural gas stream to a membrane separator. The natural gas stream has a heating value greater than or equal to about 1.15×10 | 06-19-2014 |
20150053079 | HOLLOW FIBER CARBON MOLECULAR SIEVE MEMBRANE AND PREPARATION AND USE THEREOF - A hollow fiber carbon molecular sieve membrane, a process for preparing the hollow fiber carbon molecular sieve membrane, and a process for effecting separation of an olefin from a gaseous mixture that comprises the olefin in admixture with its corresponding paraffin and optionally one or more gaseous components selected from hydrogen, an olefin other than the olefin and a paraffin other than the corresponding paraffin. The process and membrane may also be used to effect separation of the olefin(s) from remaining feedstream components subsequent to an olefin-paraffin separation. | 02-26-2015 |
20150114224 | CROSS-LINKED RUBBERY POLYURETHANE-ETHER MEMBRANES FOR SEPARATIONS - Cross-linked rubbery polyurethane-ether polymeric membranes are made from cross-linked rubbery polyurethane-ether polymers that are synthesized from a diisocyanate-terminated polyether and a tetrol with four hydroxyl functional groups. The hydroxyl groups on the tetrol react with the isocyanate groups on the diisocyanate-terminated polyether to form urethane bonds. The cross-linked rubbery polyurethane-ether polymeric membrane selectively permeate condensable vapors such as C | 04-30-2015 |
20150299596 | METHODS FOR REMOVING CONTAMINANTS FROM NATURAL GAS - A method for removing contaminants from a natural gas feed stream from a well head is provided for. The natural gas feed stream is fed to a separation unit which contains a first gas membrane unit for removing hydrocarbons and a second gas membrane unit for removing carbon dioxide from the natural gas feed stream. The method allows the same unit to be used for either hydrocarbon conditioning of field gas for drilling operations (power generation) and/or for pipeline quality natural gas production from wells. | 10-22-2015 |
20150329563 | GAS SEPARATION MATERIAL USING METAL COMPLEX AND GAS SEPARATION METHOD - A separation material and method for separating and recovering a target gas from a mixed gas including the target gas and a hydrocarbon gas that has the same number of carbon atoms as the target gas, the target gas being a hydrocarbon gas having 2 or 4 carbon atoms and a carbon-carbon double bond. This gas separation material includes: a metal complex containing a 2,3-pyrazinedicarboxylic acid; an ion of at least one type of metal (M); and an organic ligand (B) capable of bidentate coordination to the metal ion represented by general formula (1) or general formula (2), where (M), formula (1) and formula (2) are as defined herein. The metal complex has a composition represented by M | 11-19-2015 |
20160136540 | A Technique and Apparatus for Recycling Volatile Organic Compounds of Coating Printing - The present invention discloses an integrated new technique and apparatus for recycling volatile organic compounds of coating printing. The new technique collects a mixed gas of volatile organic compounds produced in the process of coating and drying of a coating machine with a volatiles collecting hood of coating machine, compresses and lead the mixed gas of volatile organic compounds into a condensation system for condensation; the obtained condensate enters a gas-liquid separator to obtain a coating solvent with high concentration; non-condensable lean gas enters a membrane separation and enrichment system to obtain a mixed gas of high concentration organic compounds after membrane separation and enrichment with a complete set of membrane assembly, and then returns to front of the condensation system to repeat the integrated technique. The separation membrane as claimed in the present invention has an extremely high permselectivity for volatile organic compounds of coating printing and can quickly enrich the volatile organic compounds. Recycling rate of volatile organic compounds of the apparatus may reach 90%, and the content of organic compounds in the tail gas emission after treatment is no more than 1 g/m | 05-19-2016 |
20160250585 | UV AND THERMALLY TREATED POLYMERIC MEMBRANES | 09-01-2016 |