Abstract: Hollow fiber membranes, such as those used in air separation modules, are generally made from solution spinning. Typically, solvent is present in the bore of the fiber for the spinning process. This solvent, in addition to the solvent already present in the polymer dope solution, may cause voids in the fiber material. By adding citric acid to the polymer dope material, these voids may be reduced or eliminated.

Abstract: Embodiments of the invention provide a membrane between a first stream of fluid that is partially or wholly in a gas phase and a second stream of fluid. The membrane includes a porous support and pores filled with a gel. The gel can selectively facilitate a transfer of compounds from the first stream to the second stream. The gel can be partially composed of the transferred compounds or materials with similar properties to the transferred compounds.

Abstract: A method of manufacturing such gas separation membrane system that includes applying to a surface of a porous substrate a layer of a nanopowder of a gas-selective metal and, thereafter, heat-treating the resultant surface treated porous substrate to yield a heat-treated and surface-treated porous substrate suitable for use as a gas separation membrane system.

Abstract: A membrane for fluid separation made of a blend of at least a polyimide polymer and a polyimidazole polymer.

Abstract: A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200° C., to a hydrogen separation membrane system comprising a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200° C.

Abstract: A device for the thermal separation of water into hydrogen and oxygen, including a closed reaction chamber (1) containing water and, in said reaction chamber: —a heating system including one or several heat source elements (4,11), —one or several membranes (3), essentially impermeable to gas, to permit the selective passage of oxygen, —one or several membranes (2), essentially impermeable to gas, to permit the selective passage of hydrogen and —a mechanism (5) to permit the passage of water into said reaction chamber. According to the invention, —said heat source(s) (4, 11) is(are) placed in the water inside said reaction chamber (1), and, —said selective membranes (3) for oxygen are placed in said zones at high temperatures, —said selective membranes (2) for hydrogen are placed in said zones at lower temperatures. Preferably, the heating system is comprised of one or several concentrators (8, 9) of solar rays focusing the rays toward the inside of the reactor.

Abstract: The invention is a ceramic tube made of two parts. A first part of the tube is made of a sensitive material for facilitating oxygen separation in the membrane. The second part is made of a different material that does not react with CO2 and/or H2O. Accordingly, by means of this Invention, there is provided a ceramic tube that is stabilized and does not deteriorate upon exposure to CO2 and/or H2O at temperatures below the operating temperatures.

Abstract: Ionic liquids can be immobilized in a membrane by, for example, bonding to a support such as a matrix, or by inclusion within a gel. Immobilized ionic liquids can be used in a number of applications, such as separation of carbon dioxide or other gases from gas streams. Membranes can be included in electrochemical cells. For example, a membrane can contain sufficient immobilized ionic liquid to reduce ionic current density of at least one of protons and hydroxyl ions, relative to carbon-containing ionic current density. A gas stream containing carbon dioxide can be introduced on a cathode side, while a source of hydrogen gas can be introduced on the anode side of the membrane. Operation of an electrochemical cell with such a membrane can separate the carbon dioxide from the gas stream and provide it at a separate outlet.

Abstract: Carbon dioxide or other gases can be separated from gas streams using ionic liquid, such as in an electrochemical cell. For example, a membrane can contain sufficient ionic liquid to reduce ionic current density of at least one of protons and hydroxyl ions, relative to carbon-containing ionic current density. A gas stream containing carbon dioxide can be introduced on a cathode side, while a source of hydrogen gas can be introduced on the anode side of the membrane. Operation of an electrochemical cell with such a membrane can separate the carbon dioxide from the gas stream and provide it at a separate outlet.

Abstract: A method and apparatus are provided for controlling the amount of purging that occurs within a membrane separation device. The membrane separation device includes a membrane separation component and sweep controlling component. Within the membrane separation component, a major portion of the non-permeate gas is sent out of the membrane separation device to work, while a minor portion is diverted for use as a sweep gas. The sweep gas is controlled by a valve that cycles with a device, such as a compressor. Thus, the membrane separation device is on when the compressor is on and is off when the compressor is off. As such, the membrane separation device is not required to sweep at all times.

Abstract: The inventive stage system for producing hydrogen consists of at least two upstream/downstream stages, respectively, each of which comprises, optionally, a catalytic reactor (C1 to C5) followed by a separator comprising a space (E1 to E4) for circulation of a gaseous mixture contacting at least one oxygen extracting membrane and a hydrogen collecting space, wherein the reactor (C1) of the upstream stage is connected to a reaction gaseous mixture source, the circulation stage (E1) of the upstream stage separator is connected to the reactor (C2) of the downstream stage and the spaces for extracting/collecting oxygen from two separators are connected to a hydrogen collecting circuit (TC, 8) which is common for two stages.

Abstract: A support for an oxygen separation membrane element to support a dense and cylindrical electrolytic membrane having oxygen ion permeability, comprises a base axially extending and having a cylindrical surface extending axially, and a plurality of ribs formed on the cylindrical surface of the base, radially projecting and axially extending, for supporting the electrolytic membrane at their ends being radially distant from the cylindrical surface of the base.

Abstract: We disclose a device for the production of hydrogen from water using heat. The device employs thermal water splitting and works essentially without electricity. It is based on the concept of a membrane reactor with two kinds of membranes allowing the separation of hydrogen and oxygen simultaneously in stoichiometric quantities from the reactor volume. The device has a special geometry resulting in a temperature distribution inside the reaction chamber to accommodate the use of hydrogen selective membranes. The device will help to reduce the need for hydrogen transport and storage as it will be rather compact for on-site use in households, small factories or gas stations. The use of the device in mobile applications is conceivable. The heat source of the device as described is combustion of a hydrocarbon using porous burner technology; however the device can be modified to exploit any other heat source, especially solar radiation.

Abstract: A nanoscale membrane exposed on opposite sides thereof and having an average thickness of less than about 100 nm, and a lateral length to thickness aspect ratio that is more than 10,000 to 1 is disclosed. Also disclosed are methods of making such membranes, and use thereof in a number of devices including fuel cells, sensor devices, electrospray devices, and supports for examining a sample under electron microscopy.

Abstract: 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 membrane elements, arranged within a housing. The housing contains tube sheets that divide the space within the housing into three separate, gas-tight spaces, with the tubes mounted in the central space. Feed gas enters the tubes through apertures positioned to feed multiple membrane elements within a tube in parallel, and one or more manifolds are used to collect residue gas from the membrane elements and direct the gas to the residue port or to a second group of membrane elements within the tube. The assembly can be used in various ways to carry out gas separation processes.

Abstract: The present invention discloses a blends of an aromatic polyimide polymer and a polymer containing aromatic sulfonic acid groups that can be converted into polybenzoxazole (PBO) membranes for gas, vapor, and liquid separations. The PBO membranes that were prepared by thermal treating aromatic polyimide membranes containing between 0.05 and 20 wt-% of a poly(styrene sulfonic acid) polymer. These polymers showed up to 95% improvement in selectivity for CO2/CH4 and H2/CH4 separations compared to PBO membranes prepared from corresponding aromatic polyimide membranes without a poly(styrene sulfonic acid) polymer.

Abstract: A process for the production of a carbon hollow fibre membrane comprising: (i) dissolving at least one cellulose ester in a solvent to form a solution; (ii) dry/wet spinning the solution to form hollow fibres; (iii) deesterifying said hollow fibres with a base or an acid in the presence of an alcohol; (iv) if necessary, drying said fibres; (v) carbonising the fibres; (vi) assembling the carbonised fibres to form a carbon hollow fibre membrane.

Abstract: 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.

Abstract: A porous substrate with a seed crystal-containing layer for manufacturing a zeolite membrane includes: a ceramic porous substrate, and a seed crystal-containing layer containing a zeolite powder to function as a seed crystal for forming a zeolite membrane and a ceramic powder and being loaded on a surface of the ceramic porous substrate and fired to fix the seed crystal-containing layer on the porous substrate. The porous substrate with a seed crystal-containing layer used for manufacturing a zeolite membrane inhibits a defect such as a crack from being generated in the zeolite layer upon manufacture or use by manufacturing a zeolite membrane by the use of the substrate which then can be subjected to air-spraying, washing, and processing for the purpose of removing a foreign substance, etc., prior to hydrothermal synthesis.

Abstract: 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); is excellent in a solvent resistance and a thermal stability, and as well has such a mechanical strength that a tensile elongation at break is not less than 10% as a hollow fiber membrane.

Abstract: 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).

Abstract: The invention relates to a device for preparing a gas flow for introduction thereof into a mass spectrometer, wherein the gas flow contains one or more analytes and has helium as carrier gas. According to the invention, a selective separating device is provided for separating off a part of the carrier gas from the gas flow (10), to form a residual gas flow (11) and a separated carrier gas flow (12). A higher fraction of the analyte is present therein than in the gas flow and in the separated carrier gas flow there is a lower fraction of the analyte.

Abstract: A lithographic projection apparatus (1) includes a support configured to support a patterning device (MA), the patterning device configured to pattern the projection beam according to a desired pattern. The apparatus has a substrate (W) table configure to hold a substrate, a projection system configured to project the patterned beam onto a target portion of the substrate. The apparatus also has a purge gas supply system (100) configured to provide a purge gas near a surface of a component of the lithographic projection apparatus. The purge gas supply system (100) includes a purge gas mixture generator (120) configured to generate a purge gas mixture which includes at least one purging gas and moisture. The purge gas mixture generator has a moisturizer (150) configured to add the moisture to the purge gas and a purge gas mixture outlet (130) connected to the purge gas mixture generator (120) configured to supply the purge gas mixture near the surface.

Abstract: The present invention is directed toward membrane leaf packets, spiral wound modules and methods for making and using the same. The subject leaf packet comprises a membrane sheet folded upon itself and reinforced with sealant and tape along at least a portion of the fold on the back side of the membrane sheet.

Abstract: Embodiments of the invention provide a membrane module including a first plurality of fibers capable of filtering fluids that are helically wound in layers creating a mono helix. Fluids to be treated can flow radially with respect to a longitudinal axis of the mono helix or parallel to the longitudinal axis of the mono helix. The membrane module can further include a second plurality of fibers that are helically wound with the first plurality of fibers to create a dual helix. The second plurality of fibers can have different properties than the first plurality of fibers in order to achieve different filtering functionalities.

Abstract: A filled epoxy tubesheet comprises an epoxy filled with a metal, such as aluminum flakes. Embodiments of the filled epoxy tubesheets can bend due to stress on the surface rather than crack. Embodiments of the filled epoxy tubesheet can be used to improve Air Separation Module performance by reducing or eliminating leakage through crack in the tubesheet.

Abstract: Disclosed are a gas separation membrane and a gas separation method in which at least one species of organic vapor is separated and recovered from an organic vapor mixture using the gas separation membrane. The gas separation membrane is made of an aromatic polyimide composed of a tetracarboxylic acid component consisting of an aromatic ring-containing tetracarboxylic acid and a diamine component comprising 10 to 90 mol % of a combination of (B1) 3,4?-diaminodiphenyl ether and (B2) 4,4?-diaminodiphenyl ether at a B1 to B2 molar ratio, B1/B2, ranging from 10/1 to 1/10, and 10 to 90 mol % of other aromatic diamine.

Abstract: Thin layers of a mixed composition are deposited on a porous substrate by chemical vapor deposition in an inert atmosphere at high temperature. The resulting membrane has excellent stability to water vapor at high temperatures. An exemplary membrane comprises an amorphous mixed-element surface layer comprising silica and at least one oxide of additional element, an optional porous substrate on which said surface layer is deposited, and a porous support on which said substrate or mixed-element surface layer is deposited, wherein the permeance of the membrane is higher than 1×10?7 mol m?2s?1Pa?1 and the selectivity of H2 over CO, CO2, and CH4 is larger than 100, and wherein the H2 permeance of the membrane after exposure to a stream containing 60 mol % water vapor at 673 K for 120 h is at least 50% of its initial H2 permeance.

Abstract: This invention discloses a composition of, a method of making, and an application of high plasticization-resistant chemically cross-linked organic-inorganic hybrid membranes such as cross-linked cellulose acetate-cellulose triacetate-polyurethanepropylsilsesquioxane membranes. These cross-linked membranes with covalently interpolymer-chain-connected hybrid networks were prepared via a sol-gel condensation polymerization of cross-linkable organic polymer-organosilicon alkoxide precursor membrane materials. CO2 plasticization tests on these cross-linked membranes demonstrate extremely high CO2 plasticization resistance under CO2 pressure up to 5516 kPa (800 psig). These new cross-linked membranes can be used not only for gas separations such as CO2/CH4 and CO2/N2 separations, O2/N2 separation, olefin/paraffin separations (e.g. propylene/propane separation), iso/normal paraffins separations, but also for liquid separations such as desalination.

Abstract: A membrane is used for separating carbon dioxide from a gas phase. The membrane includes a substrate having micro-pores that extend through the substrate and a thin hydrophobic coating on one side of the substrate in which the pores of the substrate are substantially unobstructed by the coating so that the gas phase can penetrate the pores. The coating opposes or substantially resists a liquid solvent for absorbing carbon dioxide from penetrating the pores of the membrane from the side having the coating. The membrane may also be used for separating carbon dioxide in a flue gas of a coal fired power station. Further, the coating may be relatively inert to the liquid solvent compared to the substrate.

Abstract: The invention relates to a polyaniline, comprising aniline units and organosulphur units, characterized in that the polyaniline is doped and has a number average degree of polymerization of approximately 5 to approximately 50. The scope of the invention also includes a process for the preparation of polyaniline, wherein aniline and at least one organosulphur unit are converted to a polyaniline derivative in an oxidative, acid-catalyzed polymerization reaction. A subject of the invention is also a coated substrate which is coated with the polyaniline according to the invention and also a process for the coating of the substrate. The scope of the invention furthermore also includes a coating composition which is suitable for the coating of the substrate. The invention thus also relates to a process for the preparation of the coating composition.

Abstract: A method and apparatus for separation of H2 gas from a gaseous mixture utilizing an H2 gas permeable metallic membrane supported directly on a porous substrate made up of at least one porous polymeric hollow fiber. In accordance with one preferred embodiment, the porous substrate is made up of a plurality of porous polymeric hollow fibers, forming a porous hollow fiber membrane. In accordance with one embodiment, a cooling fluid is disposed in contact with the hollow fiber, thereby enabling advantageous operation of the H2 gas separation process at elevated temperatures in the range of about 200° F. to about 800° F.

Abstract: A method of operating a membrane separation module is provided that includes the steps of directing a feed stream comprising a first component into the membrane separation module to separate the first component by permeating it across a membrane; and introducing a second component into the feed stream such that the second component has a higher permeability through said membrane than the permeability of the first component through said membrane.

Abstract: A porous structure sealed at both ends for use in a gas separation module; and a method for separating components of a gas stream.

Abstract: 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 TMPA, combined with HDPA. The membrane may utilize a porous substrate.

Abstract: The invention relates to a method for operating an internal combustion engine of a vehicle, particularly a motor vehicle, wherein the nitrogen content in an intake air flow (1) suctioned from the ambient air is reduced before delivering the air flow to at least one combustion chamber of the internal combustion engine (7) in order to produce a nitrogen-reduced combustion air flow whose oxygen content is higher than that of the suctioned air flow.

Abstract: A gas separation membrane comprises a blend of polyethersulfone (PES) and aromatic polyimide polymers that may comprise a plurality of first repeating units of formula (I), wherein X1, X 2 and X3 are herein defined.

Abstract: A dehydration method by which water is selectively separated from a water-containing mixture 31 with a separation membrane. The separation membrane is a DDR type zeolite membrane 2. The dehydration method includes bringing the mixture 31 into contact with one side of the DDR type zeolite membrane 2 and causing a pressure difference between that side of the DDR type zeolite membrane 2 which is in contact with the mixture and the other side of the DDR type zeolite membrane 2 to thereby cause the water to selectively permeate and separate out. By the dehydration method, water can be selectively separated from a water-containing mixture without the need of a high energy cost. The separation membrane has excellent acid resistance.

Abstract: Porous polymeric membranes formed from a hydrophobic polymer, such as halar having membrane pores of a size sufficient to permit gas and/or vapor permeation 0.05 ?m to 5 ?m without permitting the flow of a hydrophilic fluid across the membrane. Pore distribution is uniform and porosity is high, in some cases up to 80%. Membranes may be in the form of a flay sheet or hollow fibre for example and can be used in a variety of applications such as stripping HF gas, degassing of caustic solution, chlorine gas/alkaline filtration, degassing tap water to remove dissolved chlorine. Processes used to make such membranes can be carried out using relatively non toxic solvents such as citric acid ethyl ester or glycerol triacetate.

Abstract: An air separation module and blanket has an air separation module having an air inlet, an oxygen outlet and a nitrogen outlet. At least one tank has air separation elements for separating oxygen from air, and delivers the separated oxygen to the oxygen outlet, and delivers nitrogen to the nitrogen outlet. A resistance heating element is positioned between the blanket and the air separation module. Further, an inventive blanket for use with the air separation module is also disclosed and claimed.

Abstract: The present invention discloses a novel method of making high performance mixed matrix membranes (MMMs) using stabilized concentrated suspensions of solvents, uniformly dispersed polymer stabilized molecular sieves, and at least two different types of polymers as the continuous blend polymer matrix. MMMs as dense films or asymmetric flat sheet or hollow fiber membranes fabricated by the method described in the current invention exhibit significantly enhanced permeation performance for separations over the polymer membranes made from the continuous blend polymer matrix. MMMs of the present invention are suitable for a wide range of gas, vapor, and liquid separations such as alcohol/water, CO2/CH4, H2/CH4, O2/N2, CO2/N2, olefin/paraffin, iso/normal paraffins, and other light gases separations.

Abstract: The present invention is for novel high performance cross-linkable and cross-linked mixed matrix membranes and the use of such membranes for separations such as for CO2/CH4, H2/CH4 and propylene/propane separations. More specifically, the invention involves the preparation of cross-linkable and cross-linked mixed matrix membranes (MMMs). The cross-linkable MMMs were prepared by incorporating microporous molecular sieves or soluble high surface area microporous polymers (PIMs) as dispersed microporous fillers into a continuous cross-linkable polymer matrix. The cross-linked MMMs were prepared by UV-cross-linking the cross-linkable MMMs containing cross-linkable polymer matrix such as BP-55 polyimide. Pure gas permeation test results demonstrated that both types of MMMs exhibited higher performance for CO2/CH4 and H2/CH4 separations than those of the corresponding cross-linkable and cross-linked pure polymer matrices.

Abstract: The present invention relates to an asymmetric hollow-fiber gas separation membrane made of a polyimide having a specific repeating unit, an improved tensile elongation at break of 15% or more as a hollow-fiber membrane itself, an oxygen gas permeation rate (P?O2) of 4.0×10?5 cm3(STP)/cm2·sec·cmHg or more and a gas ratio of permeation rate of oxygen to nitrogen (P?O2/P?N2) of 4 or more that are measured at 50° C., a gas separation method and a gas separation membrane module using the asymmetric hollow-fiber gas separation membrane. In addition, the present invention relates to an asymmetric hollow-fiber gas separation membrane obtained by heat-treating the asymmetric hollow-fiber gas separation membrane at a maximum temperature of from 350 to 450° C. The asymmetric hollow-fiber gas separation membrane has sufficient mechanical strength even after the heat-treatment at a maximum temperature of from 350 to 450° C.

Abstract: There is provided herein a dryer polymer substance adapted to pervaporate a fluid (such as water, water vapor or both), the polymer substance includes: a porous support member having a plurality of pores, wherein at least a portion of the pores are filled with a cross-linked co-polymer comprising (i) a cationic monomer and an anionic monomer, (ii) a zwitterionic monomer, or a combination thereof. The substance may include a membrane or a tube.

Abstract: There is provided herein a dryer polymer substance including a hetero-phase polymer composition including two or more polymers wherein at least one of the two or more polymers include sulfonic groups, wherein the substance is adapted to pervaporate a fluid. The fluid may include water, water vapor or both. There is also provided herein a process for the preparation of a dryer polymer substance adapted to pervaporate a fluid (such as water, water vapor or both) the process includes mixing two or more polymers, wherein at least one of the two or more polymers may include groups which are adapted to be sulfonated, to produce a hetero-phase polymer composition and processing the polymer blend into a desired form.

Abstract: A lithographic projection apparatus (1) includes a support configured to support a patterning device (MA), the patterning device configured to pattern the projection beam according to a desired pattern. The apparatus has a substrate (W) table configure to hold a substrate, a projection system configured to project the patterned beam onto a target portion of the substrate. The apparatus also has a purge gas supply system (100) configured to provide a purge gas near a surface of a component of the lithographic projection apparatus. The purge gas supply system (100) includes a purge gas mixture generator (120) configured to generate a purge gas mixture which includes at least one purging gas and moisture. The purge gas mixture generator has a moisturizer (150) configured to add the moisture to the purge gas and a purge gas mixture outlet (130) connected to the purge gas mixture generator (120) configured to supply the purge gas mixture near the surface.

Abstract: A gas separation apparatus comprising: a first chamber; a second chamber, separated from the first chamber by a porous partition; a first inlet for conveying a mixture of components to the first chamber; a first outlet for discharging the remainder of the mixture of components after at least part of the first component has been removed from the first chamber; a second inlet for conveying a sweeping component into the second chamber; a second outlet for discharging a mixture of sweeping component and diffused first component from the second chamber, and a pressure equilibrating device connecting and mediating between the first and the second chamber; and a separation process using the separation apparatus.

Abstract: A hollow fiber carbon membrane is provided, which has excellent gas separation performance, unbreakable flexibility and high utility. The hollow fiber carbon membrane comprises carbonized substance obtained by calcination of a hollow fiber-like material formed from a polyphenylene oxide derivative, and has an external diameter in the range of 0.08 mm to 0.25 mm. The polyphenylene oxide derivative substantially comprises repeating units represented by the following (a) and (b) (in the structural formula, R11 and R12 independently represent hydrogen atom or sulfone group, except that R11 and R12 are both hydrogen atoms), wherein the ratio A (%) of the repeating unit (b) to the repeating units (a)+(b) satisfies 15%<A<60%.

Abstract: An air dryer having an internal orifice designed into an outlet end cap that eliminates the need for external valves or regulators to control the flow of air through the dryer. The internal orifice, which can be press-fit or threaded into the end cap, provides a consistent and stable outlet flow and dew point and eliminates the need for instruments to measure outlet flow and dew point. The orifice size can be easily changed for changing outlet flow and dew point. A protective tubular shroud is provided for shielding a membrane module of the dryer, and for routing sweep gas to a bottom vent.

Abstract: 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.