| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 095051000 | Carbon dioxide or carbon monoxide permeates barrier | 32 |
| 20100005959 | Separating Gas Using Immobilized Buffers - A layered structure can be formed having immobilized or segregated pH buffering groups that can be used to separate carbon dioxide or other gases. The pH buffering groups can be immobilized within a matrix, confined within a gel, or segregated by a semi-permeable membrane. The pH buffering groups can be configured to increase the efficiency of the system by maintaining a desirable pH profile within the cell and to permit the flow of the carbon-containing ions within the system while controlling diffusion of protons and/or hydroxyl ions. | 01-14-2010 |
| 20130098242 | PROCESS FOR SEPARATION OF GASES - The invention relates to a specific apparatus, more particularly a chain of gas separation membrane modules, for separation of gas mixtures into two fractions each of elevated purity. | 04-25-2013 |
| 20090007779 | METHOD AND SYSTEM OF PROVIDING CARBON DIOXIDE-ENRICHED GAS FOR GREENHOUSES - A feed gas is separated into a CO | 01-08-2009 |
| 20110277631 | METHOD FOR MODIFYING A POLYIMIDE MEMBRANE - There is provided a method for modifying a polyimide membrane comprising the step of exposing the polyimide membrane to a surface modification compound in a vapour phase, said surface modification compound having at least one amine group, to thereby modify the polyimide membrane. | 11-17-2011 |
| 20120006194 | HIGH FLUX SAPO-34 MEMBRANES FOR CO2/CH4 SEPARATION AND TEMPLATE REMOVAL METHOD - The present invention provides methods for making improved zeolite and crystalline silicoaluminophosphate (SAPO) membranes, in particular SAPO-34 membranes, on a porous support through improved removal of the organic structure-directing templating agent. A calcining step is performed in an oxygen free atmosphere, such as under a vacuum or inert gas, to remove the organic templating agent. By removing the templating agent in the absence of oxygen, the calcination step can remove a greater amount of the templating agent than comparable template removal steps conducted in the presence of oxygen and the calcination step can be conducted at significantly lower temperatures. The membranes of the present invention provide increased permeance while maintaining comparable selectivity for gas separations, particularly carbon dioxide (CO | 01-12-2012 |
| 20110290111 | TREATMENT OF NATURAL GAS FEEDS - The present invention provides a process for treating a natural gas stream comprising sending a natural gas stream to at least one membrane unit to produce a permeate stream containing a higher concentration of carbon dioxide and a retentate stream containing a lower concentration of carbon dioxide. Then the retentate stream is sent to an adsorbent bed to remove carbon dioxide and other impurities to produce a natural gas product stream. The regeneration gas stream is sent through the molecular sieve adsorbent bed to desorb the carbon dioxide. In one process flow scheme, the regeneration stream is combined with the permeate stream from the membrane unit. Then the combined stream is sent to an absorbent column to remove carbon dioxide from the permeate stream to produce a second natural gas product stream. In the alternative flow scheme, a second membrane unit is used to improve efficiency. | 12-01-2011 |
| 20090277327 | High Permeability Membrane Operated at Elevated Temperature for Upgrading Natural Gas - The present invention discloses a new process of treating natural gas using high gas permeability polybenzoxazole polymer membranes operated at high temperatures that can provide sufficient dew point margin for the product gas. The high gas permeability polybenzoxazole polymer membranes can be used for a single stage membrane system or for the first stage membrane in a two stage membrane system for natural gas upgrading. Simulation study has demonstrated that a costly membrane pretreatment system such as a MemGuard™ system will not be required in the present new process. The new process can achieve significant capital cost saving and reduce the existing membrane footprint greater than 50%. | 11-12-2009 |
| 20090277328 | Efficient gas-separation process to upgrade dilute methane stream for use as fuel - A membrane-based gas separation process for treating gas streams that contain methane in low concentrations. The invention involves flowing the stream to be treated across the feed side of a membrane and flowing a sweep gas stream, usually air, across the permeate side. Carbon dioxide permeates the membrane preferentially and is picked up in the sweep air stream on the permeate side; oxygen permeates in the other direction and is picked up in the methane-containing stream. The resulting residue stream is enriched in methane as well as oxygen and has an EMC value enabling it to be either flared or combusted by mixing with ordinary air. | 11-12-2009 |
| 20080210087 | MEMBRANES FOR SEPARATION OF CARBON DIOXIDE - Methods for separating carbon dioxide from a fluid stream at a temperature higher than about 200° C. with selectivity higher than Knudsen diffusion selectivity include contacting a porous membrane with the fluid stream to preferentially transport carbon dioxide. The porous membrane includes a porous support and a continuous porous separation layer disposed on a surface of the porous support and extending between the fluid stream and the porous support layer. The porous support comprises alumina, silica, zirconia, stabilized zirconia, stainless steel, titanium, nickel-based alloys, aluminum-based alloys, zirconium-based alloys or a combination thereof. Median pore size of the porous separation layer is less than about 10 nm, and the porous separation layer comprises titania, MgO, CaO, SrO, BaO, La | 09-04-2008 |
| 20090288556 | CARBON DIOXIDE PURIFICATION - A process for the recovery of carbon dioxide from a gas mixture that includes pretreating a gas mixture comprising carbon dioxide, water vapor, and one or more light gases in a pretreating system to form a cooled gas mixture, fractionating the cooled gas mixture to recover a bottoms fraction comprising carbon dioxide and an overheads fraction comprising carbon dioxide and the light gases, passing the overheads fraction over a membrane selective to carbon dioxide to separate a carbon dioxide permeate from a residue gas comprising the light gases, recycling the carbon dioxide permeate to the pretreating system, and recovering at least a portion of the bottoms fraction as a purified carbon dioxide product stream is described. | 11-26-2009 |
| 20110203455 | MULTI-STAGE PROCESS FOR REMOVING CO2 RELATIVE TO HYDROGEN FROM SYNGAS STREAMS - A multi-stage membrane process for the removal of carbon dioxide from syngas streams containing at least about 5 volume percent carbon dioxide. The syngas is preferably obtained by the gasification of a biomass feedstock. | 08-25-2011 |
| 20090266230 | Poly(ionic liquid)s as new materials for co2 separation and other applications - Polymerizable ionic liquid monomers and their corresponding polymers (poly(ionic liquid)s) are created and found to exhibit high CO2 sorption. The poly(ionic liquid)s have enhanced and reproducible CO2 sorption capacities and sorption/desorption rates relative to room-temperature ionic liquids. Furthermore, these materials exhibit selectivity relative to other gases such as nitrogen, methane, and oxygen. They are useful as efficient separation agents, such sorbents and membranes. Novel radical and condensation polymerization approaches are used in the preparation of the poly(ionic liquids). | 10-29-2009 |
| 20120067210 | HIGH TEMPERATURE GAS PROCESSING SYSTEM AND METHOD FOR MAKING THE SAME - A membrane for use in a high temperature gas processing system and method for making the same. The membrane includes a dense, gas impermeable layer and a first and second porous layer, wherein each of the first and second porous layers is a ceramic oxide material having a non-symmetrical load bearing skeleton of a plurality of pores having a graded porosity. Each porous layer provides a reduction of an oxygen partial pressure gradient across the dense layer and reduces resultant stresses in the dense layer that are small compared to its strength thereby improving long term mechanical durability of the dense layer. | 03-22-2012 |
| 20120067209 | GAS SEPARATION MEMBRANE - A membrane suitable for separating a gas from a gas mixture comprising a non cross-linked PVAm having a molecular weight of at least Mw 100,000 carried on a support wherein after casting onto the support, said PVAm has been heated to a temperature in the range 50 to 150° C., e.g. 80 to 120° C. | 03-22-2012 |
| 20090101008 | CARBON DIOXIDE PERMEABLE MEMBRANE - A carbon dioxide permeable membrane is described. In some embodiments, the membrane includes a body having a first side and an opposite second side; a plurality of first regions formed from a molten carbonate having a temperature of about 400 degrees Celsius to about 1200 degrees Celsius, the plurality of first regions forming a portion of the body and the plurality of first regions extending from the first side of the body to the second side of the body; a plurality of second regions formed from an oxygen conductive solid oxide, the plurality of second regions combining with the plurality of first regions to form the body and the plurality of second regions extending from the first side of the body to the second side of the body; and the body is configured to allow carbon dioxide to pass from the first side to the second side. | 04-23-2009 |
| 20090249950 | CROSSLINKED MEMBRANE AND POLYMER FOR MAKING SAME AND METHOD OF USING MEMBRANE - A composition of and a method of making high performances 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 | 10-08-2009 |
| 20100162887 | Carbon membranes - A process for the production of a carbon membrane comprising: (i) reacting a mixture of cellulose and hemicellulose with an acid; (ii) casting the mixture to form a film, (iii) drying said film; and (iv) carbonising said film. | 07-01-2010 |
| 20100242724 | Carbon dioxide recovery from low concentration sources - A system and method of purifying gaseous carbon dioxide from a gaseous mixture obtained at low pressure from a flue gas by passing the gaseous mixture through a vacuum swing adsorption unit and then a gas purification unit to produce carbon dioxide having a purity of approximately 97% by volume or more. | 09-30-2010 |
| 20110209610 | SEPARATING GAS USING IMMOBILIZED BUFFERS - A layered structure can be formed having immobilized or segregated pH buffering groups that can be used to separate carbon dioxide or other gases. The pH buffering groups can be immobilized within a matrix, confined within a gel, or segregated by a semi-permeable membrane. The pH buffering groups can be configured to increase the efficiency of the system by maintaining a desirable pH profile within the cell and to permit the flow of the carbon-containing ions within the system while controlling diffusion of protons and/or hydroxyl ions. | 09-01-2011 |
| 20110247492 | MODIFIED ZEOLITE Y MEMBRANES FOR HIGH-PERFORMANCE CO2 SEPARATION - Supported zeolite Y membranes exhibiting exceptionally high CO2 selectivities when used in CO | 10-13-2011 |
| 20100275777 | Membrane-Based Process for CO2 Capture from Flue Gases Generated by Oxy-Combustion of Coal - Disclosed is a membrane-based method and system for treatment of flue gases from an oxy-combustion coal-fired boiler to recover approximately 90% (vol/vol) to approximately 95% (vol/vol) of the carbon dioxide in the flue gas and produce a carbon dioxide product having a carbon dioxide concentration of approximately 90% (vol/vol dry basis) to approximately 97% (vol/vol dry basis). | 11-04-2010 |
| 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 |
| 20090165645 | CROSSLINKED POLYIMIDE MEMBRANE, METHOD FOR MAKING THE SAME USING ORGANIC TITANATE CATALYSTS TO FACILITATE CROSSLINKING AND METHOD OF USING THE MEMBRANE FOR FLUID SEPARATION - A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture, such as methane and carbon dioxide, are also disclosed. | 07-02-2009 |
| 20120000359 | NATURAL GAS PURIFICATION SYSTEM - The present invention relates to an integrated membrane/absorbent/adsorbent process and system for removal of mercury and sulfur compounds from natural gas on a ship that houses natural gas purification equipment. First mercury and most of the sulfur compounds are removed by an adsorbent bed and then the natural gas stream passes through a membrane unit to produce a partially purified natural gas residue stream to be dried and then liquefied and a carbon dioxide permeate stream that can be used as a fuel gas. | 01-05-2012 |
| 20120111192 | APPARATUS AND METHOD FOR REMOVING CARBON DIOXIDE (CO2) FROM THE FLUE GAS OF A FURNACE AFTER THE ENERGY CONVERSION - Disclosed is a method for separating carbon dioxide from a flue gas from energy conversion, wherein the flue gas is first supplied to a membrane unit, comprising at least one membrane module having a CO | 05-10-2012 |
| 20120111191 | 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 | 05-10-2012 |
| 20110094379 | FILM-BASED SYSTEM AND METHOD FOR CARBON DIOXIDE SEPARATION - A method for separating CO | 04-28-2011 |
| 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 |
| 20090178557 | Novel Polyimide Based Mixed Matrix Composite Membranes - A polyimide MMC membrane useful for the production of oxygen-enriched air or nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons or nitrogen, and the separation of helium or hydrogen from various streams. Membranes of polyimide polymers, such as polyimide polymers sold under the tradename P-84, are mixed with molecular sieve materials, such as SSZ-13, to make MMC membranes. The MMC membranes of the invention provide improved membrane performance compared to polymer only membranes, particularly when used to form asymmetric film membranes or hollow fiber membranes. The MMC films exhibit consistent permeation performance as dense film or asymmetric membranes, and do not interact with components of the process streams, such as organic solvents. The membranes of the invention exhibit particularly surprisingly good selectivity for the fluids of interest. | 07-16-2009 |
| 20120247328 | MOF NANOCRYSTALS - MOF nanocrystals having a narrow size distribution, as well as methods of making and using same are disclosed. | 10-04-2012 |
| 20120247327 | HOLLOW-FIBER MEMBRANE CONTACTORS - Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide. The liquid sorbent contacts the gas mixture along asymmetric hollow-fiber membranes that enable transfer of the carbon dioxide from the gas mixture to the liquid sorbent. | 10-04-2012 |
| 20120085233 | BLEND POLYMER MEMBRANES COMPRISING THERMALLY REARRANGED POLYMERS DERIVED FROM AROMATIC POLYIMIDES CONTAINING ORTHO-POSITIONED FUNCTIONAL GROUPS - The present invention discloses blend polymer membranes comprising thermally rearranged polymers derived from aromatic polyimides containing ortho-positioned functional groups and methods for making and using these blend polymer membranes. The blend polymer membranes described in the current invention are prepared by heat treatment of blend polymer membranes comprising aromatic polyimides containing ortho-positioned functional groups such as —OH or —SH groups. In some instances, an additional crosslinking step is performed to improve the selectivity of the membrane. These blend polymer membranes have improved flexibility, reduced cost, improved processability, and enhanced selectivity and/or permeability compared to the comparable polymer membranes that comprise a single polymer. | 04-12-2012 |
