Abstract: The porous substrate, comprises: three-dimensional-network skeletal solid phase inside the substrate, and a skin layer same in quality as the skeletal solid phase formed on at least one surface of the substrate, and a production method thereof, comprising: forming a wet gel having a three-dimensional-network skeletal solid phase and a fluid phase rich in solvent that are separated from each other in a space between a pair of flat plates by sol-gel reaction, removing the solvent in the wet gel by drying, and removing at least one flat plate of the pair of flat plates.

Abstract: Disclosed herein is a hydrogen permeable member composed of a metal porous body and a hydrogen permeable membrane placed thereon, with a diffusion preventing layer interposed between them, wherein the metal porous body has those parts on which the diffusion preventing layer is absent and such parts are filled with metal oxide particles and/or porous metal oxide. This structure prevents direct contact between the metal porous body and the hydrogen permeable membrane, thereby relieving the latter from deterioration by diffusion of metal from the former.

Abstract: Disclosed is a polyvinyl chloride recovering method for recovering polyvinyl chloride from waste including polyvinyl chloride by a continuous operation, and an system for carrying out the method, wherein the method comprises: an insoluble solid matter removing process of removing insoluble solid matters from a hot mixture of a solvent capable of dissolving polyvinyl chloride, and the waste; a solidifying process of solidifying polyvinyl chloride in water by bringing hot water into contact with a solution obtained by removing the insoluble solid matters from the hot mixture to remove the solvent; and a separating process of separating the solidified polyvinyl chloride from the water.

Abstract: An object of the present invention is to provide a method for manufacturing 2,6-DMN, in which even when a mixture containing DMN isomers which includes 5 wt % or more of 2,7-DMN is used, a highly pure 2,6-DMN can be obtained. The method for manufacturing the highly pure 2,6-dimethylnaphthalene of the present invention comprises performing cooling crystallization of a mixture containing dimethylnaphthalenes which includes 2,6-dimethylnaphthalene, performing solid-liquid separation to obtain a solid component, and washing the solid component using a solvent, wherein the solid-liquid separation performed after the cooling crystallization includes press filtration.

Abstract: A zeolite membrane support for supporting a zeolite membrane includes a metal substrate having a metal oxide layer at its surface. Preferably, the metal oxide layer has a thickness in the range of 1 nm to 10 ?m and comprises chromia, silica, or alumina. Preferably, the metal substrate is porous, having a mean pore size in the range of 10 nm to 50 ?m, and comprises an iron-based metal. A zeolite composite membrane includes the zeolite membrane support and a zeolite membrane which includes an external zeolite layer lying over the surface at and/or an internal zeolite layer lying in the pores at the metal oxide layer side of the zeolite membrane support. The zeolite membrane preferably has a composition satisfying the relationship SiO2/Al2O3?10.

Abstract: Disclosed is a polyvinyl chloride recovering method for recovering polyvinyl chloride from waste including polyvinyl chloride by a continuous operation, and an system for carrying out the method, wherein the method comprises: an insoluble solid matter removing process of removing insoluble solid matters from a hot mixture of a solvent capable of dissolving polyvinyl chloride, and the waste; a solidifying process of solidifying polyvinyl chloride in water by bringing hot water into contact with a solution obtained by removing the insoluble solid matters from the hot mixture to remove the solvent; and a separating process of separating the solidified polyvinyl chloride from the water.

Abstract: A supporting base of sufficient length and small diameter for supporting a gas separation membrane comprising a sintered material is provided. This supporting base has a high gas permeability, and allows omission of operation such as welding. This supporting base is produced by continuously extruding raw metal powder materials a and b corresponding to each constituent layer of the bilayer structure in the order starting from the raw metal powder material a constituting the inner layer to the raw metal powder material b constituting the outer layer such that the layer newly extruded surrounds the preceding layer to thereby produce a green cylinder of bilayer structure having an outer diameter of 15 mm or less; cutting the resulting green cylinder to a length of 100 mm or more; and sintering the green cylinder to thereby produce the supporting base for gas separation membrane.

Abstract: A method for purifying crude 2,6-naphthalenedicarboxylic acid includes a reduction step of reducing crude 2,6-naphthalenedicarboxylic acid containing 6-formyl-2-naphthoic acid with hydrogen and a cleaning step of cleaning the reduction product with alcohol. Preferably, in the reduction step, the crude 2,6-naphthalenedicarboxylic acid and the hydrogen is brought into contact with a hydrogenation catalyst in a liquid phase, and particularly in water. The method makes the purification process less complex and makes it possible to produce high-purity 2,6-naphthalenedicarboxylic acid without damaging equipment or increasing cost.

Abstract: Disclosed is a drying method constituted such that, in a case of including the cleaning step using the water-containing solvent, substituting a water on a microstructure by a fluorocarbon type solvent having the water substitution solvent proper value X of from 0.01 to 10 defined by the formula (1) and further substituting by a fluorocarbon type solvent which may be identical with or different from the fluorocarbon type solvent described above, enabling steps up to the drying with liquefied/critical carbon dioxide to be conducted rapidly and to prevent collapse or swell of a photoresist pattern.

Abstract: A method for purifying crude 2,6-naphthalenedicarboxylic acid includes a reduction step of reducing crude 2,6-naphthalenedicarboxylic acid containing 6-formyl-2-naphthoic acid with hydrogen and a cleaning step of cleaning the reduction product with alcohol. Preferably, in the reduction step, the crude 2,6-naphthalenedicarboxylic acid and the hydrogen is brought into contact with a hydrogenation catalyst in a liquid phase, and particularly in water. The method makes the purification process less complex and makes it possible to produce high-purity 2,6-naphthalenedicarboxylic acid without damaging equipment or increasing cost.

Abstract: Disclosed is a drying method constituted such that a microstructure is brought into contact with liquefied carbon dioxide or supercritical carbon dioxide while the surface of the microstructure being covered with a fluorocarbon type solvent, and that when in a cleaning step using a water-containing solvent, water is substituted for a water draining liquid, and then this water draining liquid is substituted for the fluorocarbon type solvent, enabling steps up to the drying step to be smoothly conducted and to prevent collapse or swell of a photoresist pattern.