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| Number | Title | Issue Date |
| 8177885 | Gas separation process using membranes with permeate sweep to remove COfrom gaseous fuel combustion exhaust A gas separation process for treating exhaust gases from the combustion of gaseous fuels, and gaseous fuel combustion processes including such gas separation. The invention involves routing a first portion of the exhaust stream to a carbon dioxide capture step, whil... | 05/15/2012 |
| 8163065 | 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 abou... | 04/24/2012 |
| 8137435 | 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 o... | 03/20/2012 |
| 8128733 | 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 s... | 03/06/2012 |
| 8088197 | Removal of carbon dioxide from air The present invention is directed to methods for removing CO2 from air, which comprises exposing sorbent covered surfaces to the air. The invention also provides for an apparatus for exposing air to a CO2 sorbent. In another aspect, the inventi... | 01/03/2012 |
| 8088196 | Purification of carbon dioxide Carbon dioxide and oxygen are separated from a feed gas, preferably derived from flue gas from an oxyfuel combustion process, by diffusion across at least one membrane in a membrane separation system to produce separated carbon dioxide gas comprising oxygen, which i... | 01/03/2012 |
| 8083834 | 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 polybenzoxaz... | 12/27/2011 |
| 8066800 | Film-based system and method for carbon dioxide separation A method for separating CO2 from a processed fluid includes exposing a film to the processed fluid and reacting the CO2 with tetrahedrally coordinated zinc hydroxide moieties contained within the film to facilitate the transport of the CO2... | 11/29/2011 |
| 8052776 | Poly(amino-alcohol)-silica hybrid compositions and membranes The present invention provides a method for making a hybrid composition membrane comprising the steps of preparing a sol comprising at least one poly(amino-alcohol) and at least one alkoxy silane, casting the sol on a surface and drying the casted sol to form the hy... | 11/08/2011 |
| 8025715 | Process for separating carbon dioxide from flue gas using parallel carbon dioxide capture and sweep-based membrane separation steps A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves routing a first portion of the flue gas stream to be treated to a carbon dioxide capture step, while simultaneo... | 09/27/2011 |
| 7964020 | Gas separation process using membranes with permeate sweep to remove COfrom combustion gases A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves flowing the flue gas stream to be treated across the feed side of a membrane, flowing a sweep gas stream, usual... | 06/21/2011 |
| 7947114 | 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) carbonizing said film. ... | 05/24/2011 |
| 7909911 | 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 abou... | 03/22/2011 |
| 7896948 | Membrane A membrane suitable for separating a gas, in particular carbon dioxide, from a gas mixture containing the gas is provided by a blend of polyvinyl alcohol (PVA) and polyvinylamine (PVAm). ... | 03/01/2011 |
| 7896949 | 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. Th... | 03/01/2011 |
| 7828875 | Membranes for highly selective separations The present invention provides modified molecular sieve membranes with improved CO2/CH4 separation selectivity and methods for making such membranes. The molecular sieve membranes are modified by adsorption of a modifying agent, such as ammonia... | 11/09/2010 |
| 7811359 | Composite membrane for separation of carbon dioxide A membrane and method for separating carbon dioxide from a mixture of gases, where the membrane includes expanded polytetrafluoroethylene and polysiloxane. The membrane is highly stable and can separate carbon dioxide at high flux in harsh environments and high temp... | 10/12/2010 |
| 7785397 | Highly microporous thermoplastic/bismaleimide semi-interpenetrating polymer network In order to synthesize semi-interpenetrating polymer networks (semi-IPNs) with molecular sieve characteristics, polyetherimide/bismaleimide (PEI/BMI) chromophore composites were made through sol-gel technique. A tunable and compatible chemical structure with fine mo... | 08/31/2010 |
| 7713332 | Carbon dioxide separation system for fuel cell system A carbon dioxide separation system for a fuel cell system having a small volume and weight of a separation device and of a membrane, at simultaneous increase of the separated volume of carbon dioxide, comprises a separation device for containing a fluid phase, a car... | 05/11/2010 |
| 7625427 | Apparatus and process for carbon dioxide absorption Carbon dioxide is separated from a gas stream using a supported carrier liquid membrane having a selected concentration of carrier species, the method being especially suitable for use in anaesthesia under conditions of periodic flow. ... | 12/01/2009 |
| 7601202 | Method and device for reducing the carbon dioxide concentration in air The invention relates to a method for reducing the carbon dioxide concentration in air of a closed or partially closed unit of space. The inventive method may comprise the steps of removing an air flow from the unit of space, guiding the air flow in a membrane syste... | 10/13/2009 |
| 7575624 | Molecular sieve and membrane system to purify natural gas The invention comprises a process of removing carbon dioxide from a natural gas feed stream comprising sending a natural gas feed stream comprising methane and carbon dioxide through an adsorbent bed to produce a carbon dioxide depleted methane rich product stream a... | 08/18/2009 |
| 7429287 | High efficiency gas sweetening system and method Disclosed are a method and system for sweetening a raw natural gas feed stream using a multi-stage membrane separation process, and in embodiments a two-stage membrane separation process. The method and system also include use of a gas turbine which operates with an... | 09/30/2008 |
| 7422623 | Separation membrane by controlled annealing of polyimide polymers This abstract discusses membranes needed to separate fluids for the production of oxygen-enriched air, nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons, and the separation of hydrogen from various petrochemical and oil refining streams. ... | 09/09/2008 |
| 7404843 | Gas separation membrane module assembly A gas-separation membrane module assembly and a gas-separation process using the assembly. The assembly includes a set of tubes, each containing gas-separation membranes, arranged within a housing. The housing contains tube sheets that divide the space within the ho... | 07/29/2008 |
| 7404844 | Method for making carbon membranes for fluid separation There is disclosed a method of making a high performance carbon membranes from polymer membranes. The method comprising the steps of exposing polymer precursor compounds to a polar organic liquid before pyrolysis of the exposed polymer precursor compounds. ... | 07/29/2008 |
| 7396382 | Functionalized inorganic membranes for gas separation A porous membrane for separation of carbon dioxide from a fluid stream at a temperature higher than about 200° C. with selectivity higher than Knudsen diffusion selectivity. The porous membrane comprises a porous support layer comprising alumina, silica, zirconia o... | 07/08/2008 |
| 7393383 | Separation membrane made from blends of polyimide with polyamide or polyimide-amide polymers Membranes are used to separate fluids for the production of oxygen-enriched air, nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons, and the separation of hydrogen from various petrochemical and oil refining streams. Membranes are discusse... | 07/01/2008 |
| 7390346 | System and apparatus for producing primary standard gas mixtures Provided is a novel system and apparatus for producing primary standard gas mixtures. The system includes providing a gas permeation device having a constant diffusion rate into a temperature controlled enclosure; connecting a supply source of a component to the per... | 06/24/2008 |
| 7351275 | Carbon monoxide production process The present invention provides for a process for producing carbon monoxide. A feed gas stream of hydrogen, carbon monoxide and carbon dioxide is directed to a membrane unit which separates the feed gas stream into two streams. The stream containing carbon monoxide i... | 04/01/2008 |
| 7338601 | Membrane separation assemblies Assemblies for use in separation of a fluid feed. Assemblies typically include an elongated housing having a fluid feed stream inlet, a residual stream outlet and a permeate stream outlet. The housing contains at least one membrane separation element to form a membr... | 03/04/2008 |
| 7329306 | Process for safe membrane operation A process is disclosed for shut-down of a membrane separation zone comprising a non-permeate side and a permeate side and processing a feed stream comprising a non-permeable component, a less-readily permeable, condensable component, and a readily permeable componen... | 02/12/2008 |
| 7318894 | Method and system for treating wastewater A method and system is disclosed for treating wastewater that utilizes membrane processes, preferably in combination with anaerobic biological treatment, to provide for economical and environmentally superior treatment without high production of biological solids. T... | 01/15/2008 |
| 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 |
| 7314503 | Process to remove nitrogen and/or carbon dioxide from methane-containing streams A process for the removal of inert gases, such as nitrogen and carbon dioxide, from methane-containing gases, such as natural gas, including a first stage removal which lowers the total combined inert content to about less than 30% and a second stage removal utilizi... | 01/01/2008 |
| 7314502 | Method and system for separating a component from a multi-component gas A method and apparatus for separating a component from a multi-component feed gas stream has a flow conduit (14) having a semi-permeable section (15) that permeates the component to be separated from feed gas stream (12). A sweep gas is provided... | 01/01/2008 |
| 7309385 | Efficient 3-D nanostructured gas separation membranes There is provided a high efficient gas separation membrane of two or more layers, which comprises a separating layer of 3-dimensional nanostructure and a supporting layer, wherein the 3-dimensional nanostructure can maximize a surface area per unit permeation area. | 12/18/2007 |
| 7306647 | Mixed matrix membrane with mesoporous particles and methods for making and using the same A mixed matrix membrane for separating gas components from a mixture of gas components is disclosed. The membrane comprises a continuous phase polymer with inorganic porous particles, preferably molecular sieves, interspersed in the polymer. The polymer has a CO | 12/11/2007 |
| 7303609 | Manufacture of polyimide-hollow fibres A process for the manufacture of a polyimide hollow fibre comprising: (i) providing a dope solution comprising one or more polyimides dissolved in a solvent comprising 60-100 wt % N-methylpyrollidone and 0-40 wt % ethanol, (ii) providing a bore fluid, (iii) generati... | 12/04/2007 |
