A method for producing a laminated complex according to one embodiment of the present invention is a method for producing a laminated complex that includes a sheet-shaped or tube-shaped porous support and a semipermeable membrane layer stacked on an outer surface of the support, the method including a coating step of coating an outer surface of the support with a semipermeable membrane layer-forming composition in which a fluororesin is dispersed in a solvent; an immersing step of immersing the coated surface of the support in water after the coating step; and a heating step of heating water in which the support is immersed.

A monolayer membrane containing gelling polymer particles having at least one of a basic functional group and an acidic functional group, and having a thickness of less than 5 ?m. A composite having a porous carrier and gelling polymer particles having at least any one of a basic functional group and an acidic functional group and filling up the surface pores of the porous carrier. The invention can provide a novel material capable of efficiently separating an acid gas from a mixed gas.

An electrochemical compressor utilizes an anion conducting layer disposed between an anode and a cathode for transporting a working fluid. The working fluid may include carbon dioxide that is dissolved in water and is partially converted to carbonic acid that is equilibrium with bicarbonate anion. An electrical potential across the anode and cathode creates a pH gradient that drives the bicarbonate anion across the anion conducting layer to the cathode, wherein it is reformed into carbon dioxide. Therefore, carbon dioxide is pumped across the anion conducting layer. The compressor may be part of a refrigeration system that pumps the working fluid in a closed loop through a condenser and an evaporator.

Water permeable coated substrates comprising a polymeric substrate in contact with a coating comprising a plurality of particles and a cross-linked polymer are disclosed. Uses of the coated substrates, particularly for water filtration are also disclosed.

The present invention relates to a method of controlling a defect structure in an MFI zeolite membrane and a method of separating xylene isomers using the MFI zeolite membrane produced by the method, and more particularly, to a method of controlling a defect structure in an MFI zeolite membrane that improves the performance of separating a xylene isomer by reducing the amount and size of defects formed in the MFI membrane structure when removing organic-structure-directing agents in the membrane through calcination at a low temperature using ozone.

A gas separation membrane that separates, by selective transmission, carbon dioxide from a mixed gas containing the carbon dioxide and nitrogen, the gas separation membrane including: a first layer; and a second layer provided at one surface of the first layer and composed of a compound having carbon dioxide separation ability, wherein an average thickness of the second layer is smaller than an average thickness of the first layer, and the second layer satisfies 0.56<?.sub.2, where an activity coefficient of nitrogen in the second layer, calculated by the COSMO-RS method, is ?.sup.2.sub.N2, an activity coefficient of carbon dioxide in the second layer is ?.sup.2.sub.CO2, and a separation performance parameter of the second layer at 25? C. is ?.sub.2=ln(?.sup.2.sub.N2)?ln(?.sup.2.sub.CO2).

A gas separation membrane includes a first layer and a second layer that is provided at the surface on one side of the first layer and that includes a compound having gas separation ability. The average thickness of the second layer is smaller than an average thickness of the first layer. The second layer is an inkjet coating. The compound preferably includes a structure derived from PET, POM, PLA, PDMS, cellulose, or a coupling agent.

A composite separation membrane is disclosed prepared by forming a separation layer on a surface of a porous support membrane, characterized in that the porous support membrane contains 50% by mass or more of polyphenylene ether; that the separation layer is constituted from a first separation layer and a second separation layer; that the first separation layer is formed with a thickness of from 50 nm to 1 ?m on the surface of the porous support membrane and is a sulfonated polyarylene ether copolymer which comprises a repeated structure of a specific hydrophobic segment and a specific hydrophilic segment; and that the second separation layer is formed with a thickness of from 1 nm to less than 50 nm on a surface of the first separation layer and is an alternately-layered product constituted from one or more kinds of ionomers.

A method of producing a composite semipermeable membrane includes forming a porous support by applying polymer solution forming a first layer and polymer solution forming a second layer on a substrate; immersing the substrate in a non-solvent; and forming a separation functional layer the porous support membrane using an aqueous solution containing polyfunctional amine and an organic solvent solution containing a polyfunctional acid halide; wherein the first layer is formed to contact the substrate; the second layer is formed to contact the separation functional layer; the polymer solutions contain polysulfone; the concentration of polysulfone in a polymer solution A is 12% or more and 18% or less by weight; the concentration of polysulfone in a polymer solution B is 14% or more and 25% by weight or less; and the polysulfone concentration of the polymer solution B is greater than the polymer concentration of the polymer solution A.

The present invention relates to synthetic membranes and use of these synthetic membranes for isolation of volatile organic compounds and purification of water. The synthetic membrane includes a hydrophobic polymer layer located on a polymeric membrane support layer. The invention includes a method of isolating volatile organic compounds with the synthetic membrane by contacting a volatile organic mixture with the hydrophobic polymer layer of the synthetic membrane and removing volatile organic compounds from the polymeric membrane support layer of the synthetic membrane by a process of pervaporation. The invention also includes a method of purifying water with the synthetic membrane by contacting an ionic solution with the hydrophobic polymer layer of the synthetic membrane and removing water from the polymeric membrane support layer of the synthetic membrane by a process of reverse osmosis. The invention also relates to methods of isolating non-polar gases by gas fractionation.