Nitto-denko Corporation

Shinya Nishiyama

Takahisa Konishi

Naomichi Kimura

Hiroyuki Katayama

Yasuhiro Uda

Shinichi Inoue

Terukazu Ihara

Hiroki Fujioka

Hirokazu Matsuda

Kouji Maruyama

Satoru Suzuki

Naoki Kurata

Koso Matsuda

Chiaki Harada

Kensuke Tani

Takashi Kamada

Taisuke Yamaguchi

Kazuya Yoshimura

Yuuji Yamashiro

Daiki Iwasaki

Yuri Ito

Tomoya Hirai

Provided is a carbon-dioxide capture and treatment system comprising: a carbon dioxide-enriched mixture gas generation device comprising a separation membrane capable of increasing a carbon dioxide concentration of a mixture gas taken therein, thereby generating a carbon dioxide-enriched mixture gas; a carbon dioxide conversion device configured to convert carbon dioxide in the enriched mixture gas received from the carbon dioxide-enriched mixture gas generation device, into a chemically stable compound; a final treatment device comprising an adsorbent, wherein the final treatment device is configured to adsorb the carbon dioxide by the adsorbent, thereby separating the carbon dioxide from other gas components; and a carbon dioxide direct capture device configured to take in air contained in an ambient environment, and supply the taken-in air to the final treatment device or an upstream side thereof in the carbon-dioxide capture and treatment system.

Carbon-dioxide capture and treatment system and carbon-dioxide negative emissions plant

A purification system is for purifying a mixture containing a first solvent, a second solvent, and an impurity. The purification system includes a first membrane separation device including a pervaporation membrane and a second membrane separation device including a filtration membrane. The pervaporation membrane separates the mixture into a first permeated fluid and a first concentrated fluid. The first permeated fluid has a lower concentration of the impurity than that in the mixture, and the first concentrated fluid has a higher concentration of the impurity than that in the mixture. The filtration membrane separates the first concentrated fluid into a second permeated fluid and a second concentrated fluid. The second permeated fluid has a lower concentration of the impurity than that in the first concentrated fluid, and the second concentrated fluid has a higher concentration of the impurity than that in the first concentrated fluid.

Purification system, purification method, membrane separation device, and solvent manufacturing method

The present invention provides a separation membrane that is suitable for separating an acid gas from a gas mixture containing the acid gas and has a high acid gas permeability. A separation membrane () of the present invention includes: a separation functional layer (); a porous support member () supporting the separation functional layer (); and an intermediate layer () disposed between the separation functional layer () and the porous support member (), and including a matrix () and nanoparticles () dispersed in the matrix ().

Separation membrane

A method for producing a spiral wound separation membrane element includes preparing a composite semipermeable membrane having a skin layer on the surface of a porous support. The method further includes forming on the skin layer a protective layer containing 35 mg/mor more of an anionic polyvinyl alcohol to prepare a protective layer-equipped composite semipermeable membrane, preparing an unwashed spiral wound separation membrane element from the protective layer-equipped composite semipermeable membrane, and passing wash water through the unwashed spiral wound separation membrane element to remove the protective layer on the skin layer.

Method for producing spiral wound separation membrane element

It is an object of the present invention to provide a composite semipermeable membrane having an excellent resistance property to contamination, particularly an excellent resistance property to microbial contamination, and a water treatment method using the composite semipermeable membrane. The present invention relates to a composite semipermeable membrane comprising a skin layer formed on the surface of a porous support and containing a polyamide-based resin obtained by reacting a polyfunctional amine component with a polyfunctional acid halide component, wherein an antibacterial layer containing a silver-based antibacterial agent and a polymer component is formed on the skin layer directly or with other layer interposed therebetween, and the weight ratio between the silver-based antibacterial agent and the polymer component in the antibacterial layer is 55:45 to 95:5 (silver-based antibacterial agent:polymer component).

Composite semipermeable membrane

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Osaka, Japan

Shinya Nishiyama