Tokyo Metropolitan University

Praxair Technology, Inc.

Nissan Chemical Corporation

Shin-Etsu Chemical Co., Ltd.

Riken Corporation

Gas Research Institute

Union Carbide Industrial Gases Technology Corporation

Hiroyoshi Kawakami

Hiroyuki Nishide

Eishun Tsuchida

Takamasa Kikuchi

Tadayuki Isaji

Manabu Tanaka

Yuri Kameyama

Yoshiaki Suzuki

Tsuneo Kimura

Masaya Iwaki

Kazutoshi Odaka

Shoji Nagaoka

Yukiko Sasame

Guangbin Zhou

Hiroto Mikami

Ajay Y Houde

S Alexander Stern

Azusa Osawa

Yuki Kudo

Shoichi Hasebe

A gas separation membrane containing a matrix resin and hyperbranched polymer- or dendrimer-bound, heteromorphous shaped silica nanoparticles, which are formed of heteromorphous shaped silica nanoparticles having surfaces onto which a hyperbranched polymer or a dendrimer is chemically added.

Gas separation membrane containing heteromorphous shaped silica nanoparticles

A method for producing a gas separation membrane, including the following steps: step (a): treating the surfaces of silica nanoparticles dispersed in a first solvent with a reactive functional group-containing compound, while nanoparticles are being dispersed in the solvent, to thereby prepare a first solvent dispersion of reactive functional group-modified silica nanoparticles; step (b): replacing the first solvent dispersion's dispersion medium of reactive functional group-modified silica nanoparticles prepared in step (a) with a second solvent without drying of dispersion medium, and then reacting functional group-modified silica nanoparticles with dendrimer-forming monomer or hyperbranched polymer-forming monomer in the second solvent's presence so that dendrimer or hyperbranched polymer is added to reactive functional group, to thereby prepare dendrimer- or hyperbranched polymer-bound silica nanoparticles; step (c): mixing dendrimer- or hyperbranched polymer-bound silica nanoparticles prepared in step (b) with a matrix resin; and step (d): applying mixture prepared in step (c) to a substrate, and then removing the solvent.

Method for manufacturing gas separation membrane

A room temperature curable organopolysiloxane composition is provided. The composition comprises (I) an organopolysiloxane which is a condensation product of component (A) (an organopolysiloxane comprising RSiOunit and SiOunit and containing 0.02 to 0.12 mol/100 g of hydroxy group bonded to the silicon atom) and component (B) (a diorganopolysiloxane raw rubber having hydroxy group on opposite ends thereof), (II) an organosilane compound having at least 2 hydrolyzable groups bonded to the silicon atom on average per molecule, and/or its partial hydrolytic condensate, (III) a solvent, and (IV) a silica nano particle having its surface modified by a branch structure. The composition is capable of providing a high strength film without incorporating reinforcement fillers, with no curing inhibition by the inorganic nano particles, and without inhibiting gas separation performance realized by the inorganic nano particles.

Room temperature curable organopolysiloxane composition and gas separation membrane

The object of the present invention is to provide a novel gas separation membrane having a high gas permeability and a high gas selectivity, and a method of producing the same. The present invention provides a gas separation membrane comprising a polymeric material soluble in an organic solvent, wherein at least a part of the surface is modified by ion bombardment.

Gas separation membrane and method of producing the same

A process for separating a first gas from a second gas, having the steps of: (1) contacting one side of a semi-permeable gas separation membrane with a feed gas mixture containing at least the first gas and the second gas, wherein the membrane divides a separation chamber into a high-pressure side into which the feed gas mixture is fed and a low-pressure side; (2) maintaining a pressure differential across the membrane under conditions such that the first gas in the feed gas mixture selectively permeates through the membrane from the high-pressure side to the low-pressure side of the membrane; (3) removing from the low-pressure side of the membrane permeated gas mixture which is enriched in the first gas and depleted in the second gas; and (4) removing from the high-pressure side of the membrane a gas mixture which is enriched in the second gas and depleted in the first gas. The membrane used is made, at least in part, of a thin discriminating layer of polyimide having the repeating formula ##STR1## wherein R is: ##STR2##

Material and process for separating carbon dioxide from methane

Oxygen-separating porous membranes comprise a complex of (a) a transition metal (II) ion, (b) a ligand, and (c) an aromatic amine, retained in the pores of a substrate.

Oxygen-separating porous membranes

Oxygen-permeable polymeric membranes, intended for use in processes for producing oxygen- or nitrogen-enriched air for industrial, medical, and other applications, are characterized by a complex which comprises (a) a copolymer of a vinyl aromatic amine and either (i) a fluoroalkyl acrylate or (ii) a fluoroalkyl methacrylate, and (b) a ligand taken from the group consisting of (1) porphyrins, (2) Schiff bases, (3) cyclidenes, and (4) amine-like macrocycles, and (c) a transition metal (II) ion.

Oxygen-permeable polymeric membranes

Oxygen-permeable polymeric complexes comprise (a) a transition metal (II) ion, (b) a liqand of meso-tris(.alpha., .alpha.,.alpha.-o-substituted-amidophenyl)-mono-(.beta.-o-substituted amidophenyl) porphyrinato, and (c) an aromatic amine polymer.

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Hachioji, Japan

Hiroyoshi Kawakami