Kuraray Co., Ltd.

Kawasaki Jukogyo Kabushiki Kaisha

Youhei Yabuno

Kazuhiko Eda

Kensaku Komatsu

Koji Miyake

Katsuya Umemoto

Koji Fukumoto

Tomoaki Umemura

Takafumi Ito

Arata Ishiodori

Tsukasa Yoshitoshi

Yusuke Hayashi

A gas separation membrane module includes at least one hollow fiber membrane element and a casing. The hollow fiber membrane element includes hollow fiber membranes and a cylindrical body. The cylindrical body extends in a longitudinal direction of the hollow fiber membranes, and accommodates the hollow fiber membranes. The hollow fiber membrane element includes sweep gas introduction ports and mixed gas discharge ports. A first supply chamber, a first discharge chamber, a second supply chamber, and a second discharge chamber are positioned between the casing and the hollow fiber membrane element. The first supply chamber, the first discharge chamber, the second supply chamber, and the second discharge chamber are partitioned off from each other.

Gas separation membrane module

Hollow fiber membrane module

One aspect of the present invention concerns a porous hollow fiber membrane containing a vinylidene fluoride-based resin. The hollow fiber membrane has a gradient structure in which a pore diameter of pores in the hollow fiber membrane gradually becomes smaller at least toward one of inner and outer peripheral surface sides and is hydrophilized by containing a crosslinked body of a polyvinylpyrrolidone-based resin.

Hollow fiber membrane, and method for producing hollow fiber membrane

Provided is a vinylidene fluoride porous hollow fiber membrane excellent in fouling resistance due to reduced organic substance absorbance, preferably having preferable pore structures to enable to have high permeability, high fractionation performance, and good process controllability. The membrane includes a vinylidene fluoride resin and 0.5 to 10% by weight of a hydrophilic resin, having a ratio Pi/Po of 2.5 to 50 where Pi and Po denote an average pore size on inner surface and an average pore size on outer surface, respectively, and having a pure water permeation rate satisfying the following formula:(FLUX/FLUX)&#xd7;100&#x2265;40.0

Hydrophilised vinylidene fluoride-based porous hollow fibre membrane, and manufacturing method therefor

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Okayama, Japan

Youhei Yabuno