Sumitomo Chemical Company, Limited

Kosuke Makiguchi

Shohei Kasahara

Taigo Kashiwabara

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

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.

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Osaka, Japan

Kosuke Makiguchi