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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,...
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7842124 |
Polymer membrane for separating aromatic and aliphatic compounds
This invention relates to a polymeric membrane composition comprising an associating polymer. The polymer coating is characterized as having hard and soft segments where the hard segment comprises...
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7758751 |
UV-cross-linked membranes from polymers of intrinsic microporosity for liquid separations
The present invention is for high performance UV-cross-linked membranes from polymers of intrinsic microporosity (PIMs) and the use of such membranes for separations. More specifically, the...
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7572318 |
High-temperature membrane for CO2 and/or H2S separation
A nonporous metal carbonate membrane for selective separation of CO2 from a CO2-containing fluid having a porous substrate having a feed side and a permeate side. The membrane is also suitable for...
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7544340 |
Method for creating a gas-liquid contact area
A method for contacting a liquid with a gas in which the gas is introduced into a vessel containing at least one hollow fiber membrane having a plurality of porous hollow fibers. The liquid is...
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7497895 |
Membrane separation process
The invention relates to an improved membrane pervaporation and vapor permeation system in which the vacuum is produced by a fluid passing through a Venturi-type nozzle. The fluid is chosen from...
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7490725 |
Reverse osmosis membrane and process
A reverse osmosis membrane, and methods for making and using the membrane. The membrane has a continuous, defect-free, non-porous, hydrophilic coating that reduces the susceptibility to fouling.
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7452405 |
Multi stage sulfur removal system and process for an auxiliary fuel system
A system for producing an auxiliary fuel stream containing a low concentration of sulfur compounds from a primary fuel stream includes a first separation stage to separate a portion of a primary...
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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...
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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...
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7318898 |
Polymeric membrane wafer assembly and method
A method for separating aromatic hydrocarbons from a feed stream. The method includes flowing the feed stream through a first channel within a first wafer assembly that may contain an underflow...
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7074256 |
Phosphazene membranes for gas separations
A polyphosphazene having a glass transition temperature (“Tg”) of approximately −20° C. or less. The polyphosphazene has at least one pendant group attached to a backbone of the polyph...
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6860920 |
Block polyester-ether gas separation membranes
Gas separation membranes formed from polyester-polyether block copolymers which are useful for separating gases from gas mixtures. The membranes and processes are especially suited for separating...
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6843829 |
Block polyurethane-ether and polyurea-ether gas separation membranes
Gas separation membranes formed from polyether-urethane or polyether-urea block copolymers are useful for separating gases from gas mixtures. The membranes and processes are especially suited for...
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6752852 |
Apparatus for removing moisture from fluids comprising acid gases; methods of using same, and compositions
Methods and apparatus for reducing moisture content of fluids comprising moisture and a sulfur-containing compound are disclosed. The methods use an acid gas resistant molecular sieve, and the...
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6706090 |
Method for recovering and/or separating sulfur oxyfluorides from gas mixtures
A method for the recovery or separation of sulfur oxyfluorides from gas mixtures, in which the gas mixture passes through at least one adsorption stage or membrane stage containing or consisting of...
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6632266 |
High-pressure separation of a multi-component gas
The invention relates to a method of separating one or more components from a multi-component gas stream comprising at least one non-acid gas component and at least one acid gas component. A...
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6585801 |
Operating method of gas engine accommodating to sour gas and the system thereof
The operating system of a gas engine accommodating to sour gas comprises a sour gas compressing and feeding part including a compressor 11 and a gas engine 12, a pre-membrane-treatment 13 for...
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6579341 |
Nitrogen gas separation using organic-vapor-resistant membranes
A process for separating nitrogen from a multicomponent gas mixture containing nitrogen and a hydrocarbon, such as natural gas or associated gas, using gas-separation membranes selective for...
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6572678 |
Natural gas separation using nitrogen-selective membranes of modest selectivity
A process for treating natural gas or other methane-rich gas to remove excess nitrogen and optionally excess carbon dioxide, water vapor or hydrogen sulfide. The invention relies on gas separation...
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6565821 |
Process for removing the fluorocompounds or fluorosulphur compounds from a stream of xenon and/or krypton by permeation
A process and a plant for removing the gaseous fluorocompounds or fluorosulphur compounds, such as CF4, C2F6, and SF6, present in a stream of xenon and/or krypton, by permeation via one or more...
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6565626 |
Natural gas separation using nitrogen-selective membranes
A process for treating natural gas or other methane-rich gas to remove excess nitrogen and carbon dioxide simultaneously. The invention relies on membrane separation using nitrogen/methane and...
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6454836 |
Method and apparatus for wellbore gas separation
A downhole preferential hydrocarbon gas recovery system and method employ preferentially selective materials to separate the hydrocarbon gas from contaminants. According to one aspect of the...
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6395067 |
Geometric separation processes involving modified CTS membranes
Porous titanium silicate molecular sieves are produced in the form of a membrane capable of separating fluid molecular mixtures.
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6368382 |
Epoxysilicone coated membranes
The invention relates to a method of making an epoxysilicone coated membrane by coating a porous asymmetric membrane layer with a UV-curable controlled release epoxysilicone coating. A mixture of...
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6355092 |
Apparatus and method for performing membrane gas/liquid absorption at elevated pressure
The invention relates to an apparatus for performing membrane gas/liquid absorption at elevated pressure, comprising a pressure vessel in which a membrane unit is provided for separate feed-through...
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6197269 |
Method for absorbing gaseous oxidizable or reducible constituents through a membrane
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6190621 |
Desulfurization apparatus and electric power plant using the same
The speed of coal gas desulfurization is improved and the total size of the apparatus can be made compact. The apparatus comprises a sulfide-ion-producing portion (54), which reacts with a sulfur...
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6165253 |
Apparatus for removal of volatile organic compounds from gaseous mixtures
A vaporizable solute transfer system for transferring a vaporizable solute from a gas feed mixture to an absorbent liquid comprises an absorption module, a porous membrane which divides the...
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6053965 |
Fuel gas conditioning process
A process for conditioning natural gas containing C3+ hydrocarbons and/or acid gas, so that it can be used as combustion fuel to run gas-powered equipment, including compressors, in the gas field...
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5753011 |
Operation of staged adsorbent membranes
A staged adsorbent membrane system is operated to separate a gas mixture wherein more strongly adsorbed secondary components preferentially adsorb and permeate through the adsorbent membrane in the...
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5749941 |
Method for gas absorption across a membrane
The invention relates to a method for the absorption of one or more gaseous components from a gas phase, in that the gas phase with the component(s) to be absorbed present therein is brought into...
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5735936 |
Process and apparatus for eliminating at least one acid gas by means of a solvent for the purification of natural gas
The process comprises a cold absorption step 2 for removing acid gas from natural gas using a solvent phase at a pressure P2 which delivers a purified gas 5; a step for depressurizing and...
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5611842 |
Organic and inorganic vapor permeation by countercurrent condensable sweep
A process for the removal of at least one non-water vapor component of a vaporous mixture, the basic process comprising directing a vaporous mixture against the feed side of a membrane, directing a...
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5558698 |
Acid gas fractionation process
Improved processes for treating gas streams containing hydrogen sulfide and carbon dioxide, particularly natural gas streams. The processes rely on the availability of a membrane that maintains...
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5556449 |
Acid gas fractionation process for fossil fuel gasifiers
Improved processes for treating gas streams containing hydrogen sulfide and carbon dioxide, particularly gas streams from fossil fuel gasification processes. The processes rely on the availability...
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5415681 |
Process for removing inorganic components from water
A process for removing inorganic components from water is disclosed. The process involves gas stripping followed by membrane separation treatment of the stripping gas. The stripping step can be...
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5407466 |
Sour gas treatment process including membrane and non-membrane treatment steps
Improved processes for treating gas streams containing hydrogen sulfide, carbon dioxide, water vapor and methane, particularly natural gas streams. The processes rely on the availability of two...
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5407467 |
Sour gas treatment process
Improved membranes and improved membrane processes for treating gas streams containing hydrogen sulfide, carbon dioxide, water vapor and methane, particularly natural gas streams. The processes...
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5336298 |
Polyelectrolyte membranes for the separation of acid gases
Acid gases are separated from a gas stream by bringing the gas stream into contact with a multilayer composite membrane comprising a nonselective polymeric support layer and an active separating...
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5332424 |
Hydrocarbon fractionation by adsorbent membranes
A method is disclosed for separating a multicomponent gas mixture comprising at least three components into three product streams by use of adsorbent membrane zones operating in series. Each...
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5234471 |
Polyimide gas separation membranes for carbon dioxide enrichment
Aromatic polyimide membranes have superior flux at low temperature for carbon dioxide and other condensable gases. Superior flux is achieved without reduction in selectivity or other valuable...
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5209848 |
Xylylene based polyether membranes for gas separation
The invention relates to novel xylylene based polyether gas separation membranes and a method of separating gases using such membranes.
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5199962 |
Process for removing condensable components from gas streams
A process for treating a gas stream to remove or recover a condensable component. The process involves a condensation step and a membrane concentration step. The condensation step may be followed...
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5178650 |
Polyimide gas separation membranes and process of using same
Novel aromatic polyimide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides are derived from a...
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5178649 |
Poly(arylene ether ketimine) gas separation membranes
This invention relates to novel poly(arylene ether ketimine) gas separation membranes and a process for separating gases using such membranes.
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5149340 |
Process and apparatus for separating impurities from hydrocarbons
A semi-permeable membrane process of separating impurities from a hydrocarbon mixture. A fuel gas sweep gas is used to purge and dilute the permeate. Because this reduces the partial pressure of...
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5127926 |
Membrane process for treating pump exhausts
A process for removing an undesirable vapor from a pump exhaust by a membrane separation process. The process takes advantage of the pressure difference between the inlet and outlet sides of the...
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5082472 |
Composite membrane for facilitated transport processes
A dimensionally stable, composite membrane of a microporous film in laminar contact with a continuous perfluoro ion exchange resin layer is provided. The composite membrane comprises a continuous...
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5076817 |
Polyamide gas separation membranes and process of using same
Polyaramide gas separation membranes and the process of using them are disclosed. The polyaramide gas separation membranes have the formula, ##STR1## where --R-- is ##STR2## --Ar'-- is ##STR3##...
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