Sumitomo Chemical Company, Limited

Shohei Kasahara

Kosuke Makiguchi

Yudai Ota

Yoshihito Okubo

Cui Liang

Taigo Kashiwabara

Kazuya Inamoto

Tsutomu Tasaki

Hironori Takemoto

Atsushi Shudo

Osamu Hirose

Kohei Yamamoto

The present invention provides a composition containing the following components (A)-(C): (A) an alkali metal compound, (B) a polymer having an acidic dissociative group, and (C) a compound having an acidic dissociative group and an amino group, and having β of more than 0.0 and less than 1.0 as calculated by the formula (I): β={amount (mol) of alkali metal in component (A)−amount (mol) of acidic dissociative group in component (B)}/amount (mol) of acidic dissociative group in component (C).

Composition useful for producing acidic gas separation membrane

An acidic gas separation membrane sheet causes an acidic gas to selectively permeate therethrough. The acidic gas separation membrane sheet includes a first porous layer, a hydrophilic resin composition layer, and a second porous layer in this order. A second peel strength between the second porous layer and the hydrophilic resin composition layer is less than a first peel strength between the first porous layer and the hydrophilic resin composition layer. An average value of the second peel strength is within a range of greater than or equal to 5 N/m and less than or equal to 500 N/m.

Acidic gas separation membrane sheet and manufacturing method therefor

Provided are a spiral-wound gas separation membrane element, a manufacturing method therefor, a gas separation membrane module and a gas separation apparatus that include the element. The element includes a laminated body wound around a perforated central tube and including a separation membrane-flow channel member composite body. The composite body includes a gas separation membrane including a first porous layer and a hydrophilic resin composition layer. The gas separation membrane is folded with the first porous layer being located outside the hydrophilic resin composition layer. The composite body also includes a flow channel member that forms a gas flow channel, the flow channel member being sandwiched in the folded gas separation membrane. The flow channel member is provided with a first cover that covers one end portion of four end portions. The first cover is located closest to a turn-back part of the folded gas separation membrane.

Spiral-wound gas separation membrane element, gas separation membrane module, and gas separation apparatus

A separation membrane sheet that causes a specific fluid component to selectively permeate therethrough, comprises: a first porous layer; and a resin composition layer formed on the first porous layer. The resin composition layer has a filtration residue fraction of greater than or equal to 20% and less than or equal to 90%; and contains a resin having an ionic group or a salt thereof, and has an ion exchange capacity of greater than or equal to 1 millimole equivalent per 1 g of a dry resin in a filtration residue.

Separation membrane sheet, separation membrane element, separation membrane module, and manufacturing method for separation membrane sheet

A spiral-wound acid gas separation membrane element () includes a wound body which includes a laminate and a perforated core (), the laminate being wound around the perforated core tube () and including: a separation membrane (), a feed-side channel component (), and an element constituent layer (e.g., permeate-side channel component ()). The separation membrane () is provided with a sealing section () present at both widthwise ends of the separation membrane (). The sealing section () is sealed with an adhesive. This makes it possible not only to separate acid gas from mixed gas more efficiently as compared to a conventional spiral-wound acid gas separation membrane element but also to save energy.

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Osaka, Japan

Shohei Kasahara