Patent application number | Description | Published |
20080216650 | Synthesis of Zeolites and Zeolite Membranes Using Multiple Structure Directing Agents - SAPO-34 membranes and methods for their preparation and use are described. The SAPO-34 membranes are prepared by contacting at least one surface of a porous membrane support with a synthesis gel comprising a first and a second templating agent. SAPO-34 crystals having a narrow size distribution were applied to the surface of the support prior to synthesis. A layer of SAPO-34 crystals is formed on at least one surface of the support. SAPO-34 membranes of the invention can have improved selectivity for certain gas mixtures, including mixtures of carbon dioxide and methane. | 09-11-2008 |
20090236285 | ETHANOL SEPARATION BY A MIXED MATRIX MEMBRANE - A mixed matrix membrane including at least one layer of a porous carbon-based structure and a plurality of silicalite crystals dispersed on a surface of the porous carbon-based structure and/or within the porous carbon-based structure. The membrane is suitable for use in processes involving the separation of ethanol from ethanol-containing mixtures. | 09-24-2009 |
20090239288 | INTEGRATED MEMBRANE SEPARATION - BIOREACTOR FOR SELECTIVE REMOVAL OF ORGANIC PRODUCTS AND BY-PRODUCTS - A system for selective removal of metabolites from an aqueous broth including a bioreactor vessel containing at least one live culture producing at least one metabolite disposed within an aqueous broth, and a membrane module having a mixed matrix membrane suitable for selective removal of the at least one metabolite from the aqueous broth. The membrane is made of mixtures of hydrophobic zeolite and carbon on a porous substrate. In accordance with one particularly preferred embodiment of this invention, the membrane module is integral with the bioreactor vessel. | 09-24-2009 |
20100116130 | METHOD OF MAKING A HIGH-PERFORMANCE SUPPORTED GAS SEPARATION MOLECULAR SIEVE MEMBRANE USING A SHORTENED CRYSTALLIZATION TIME - A method of making a supported gas separation molecular sieve membrane. In this method a porous support, which is preferably pretreated, is contacted with a molecular sieve synthesis mixture under hydrothermal synthesis conditions. The contacting step is conducted for a shortened crystallization time period. The resulting coated porous support is calcined to yield the supported gas separation molecular sieve membrane having particularly good gas separation characteristics. | 05-13-2010 |
20100119810 | COMPOSITIONALLY UNIFORM, MULTI-LAYER, GROUP VB, HYDROGEN TRANSPORT MEMBRANE - A hydrogen-selective membrane material having a dense inner membrane layer composed of a Group VB alloy and no Pd disposed between two porous outer membrane support layers composed of the same Group VB alloy and no Pd or other noble metal, the amount of the Group VB alloy being greater than about 90 atomic % of each layer. | 05-13-2010 |
20110094380 | ULTRA-THIN CO2 SELECTIVE ZEOLITE MEMBRANE FOR CO2 SEPARATION FROM POST-COMBUSTION FLUE GAS - A method for producing a crystalline silicoaluminophosphate (SAPO) membrane in which a porous support is contacted with SAPO seed crystals to form a SAPO seeded porous support. The SAPO seeded porous support is filled with an aqueous SAPO synthesis gel including a mixture of sources of aluminum, phosphorus, silicon, oxygen, water, and a templating agent, forming a gel-filled porous structure which is then heated to form a SAPO layer of SAPO crystals on a surface of and/or within pores of the porous support. The SAPO layer is calcined, thereby removing the templating agent and forming a supported porous SAPO membrane layer, which is then subjected to a pore size reduction post-synthesis treatment process, producing a reduced pore size supported porous SAPO membrane layer having an average pore size of less than about 0.38 nm. | 04-28-2011 |
20110113958 | METHOD OF MAKING A HIGH-PERFORMANCE SUPPORTED GAS SEPARATION MOLECULAR SIEVE MEMBRANE USING A SHORTENED CRYSTALLIZATION TIME - A method of making a supported gas separation molecular sieve membrane. In this method a porous support, which is preferably pretreated, is contacted with a molecular sieve synthesis mixture under hydrothermal synthesis conditions. The contacting step is conducted for a shortened crystallization time period. The resulting coated porous support is calcined to yield the supported gas separation molecular sieve membrane having particularly good gas separation characteristics. | 05-19-2011 |
20120012001 | OXYGEN ENRICHMENT USING SMALL-PORE SILICOALUMINOPHOSPHATE MEMBRANES - A method of oxygen enrichment in which a gaseous mixture containing O | 01-19-2012 |
20140076161 | NANO-CHANNEL ENHANCED COMPOSITE MEMBRANES - An apparatus for gas separation a composite gas separation membrane having a gas separation layer disposed on a surface of a porous support. The gas separation layer has a plurality of gas permeable inorganic nano-particles embedded in a dense polymer forming substantially only discrete gas transport channels through the dense polymer layer, wherein direct fluid communication is provided from a feed side of the composite gas separator membrane to the porous support. Preferably, the inorganic nano-particles are porous molecular sieve particles, such as SAPO-34, ALPO-18, and Zeolite Y nano-particles. | 03-20-2014 |
20140260968 | METHOD AND APPARATUS FOR DESORPTION USING A MICROPOROUS MEMBRANE OPERATED IN WETTED MODE - A method for desorption of one or more gases from a liquid stream in which a liquid stream containing at least one gas is provided to the feed side of a porous membrane and a trans-membrane pressure drop from the feed side to the opposite gas side of the membrane is created, resulting in a portion of the liquid stream filling at least a portion of the pores of the porous membrane and desorption of at least a portion of the at least one gas from the liquid stream to the gas side of the porous membrane. | 09-18-2014 |
20150045579 | PROCESS FOR PURIFICATION OF METHYL METHACRYLATE USING MOLECULAR SIEVE MEMBRANES - A method for separating the components of a mixture containing methyl methacrylate, water, and methanol in which the mixture is dehydrated in a first stage membrane unit, producing a dehydrated mixture. Methanol in the dehydrated mixture is removed in a second stage membrane unit, producing a retentate stream containing methyl methacrylate and substantially no said methanol. | 02-12-2015 |