Membrane-forming stock solution for carbon film and manufacturing method of carbon hollow fiber membrane using this

Japanese Patent JP6358337

B2

A membrane-forming dope for carbon membranes, comprising polyphenylene oxide in an amount giving a concentration of 15 to 40 wt.% in the membrane-forming dope, and sulfur in an amount giving a ratio of 0.1 to 5.0 wt.%, preferably 0.2 to 3.0 wt.%, of the total weight of the polyphenylene oxide and the sulfur, both of which are dissolved in a solvent that can dissolve these components. A hollow fiber carbon membrane is produced by molding the membrane-forming dope for carbon membranes in a hollow shape by means of a wet or dry-wet spinning method using a double tubular nozzle, subjecting the molded product to an infusibilization treatment by heating at 150 to 350°C in the air, and then subjecting it to a carbonization treatment by heating at 600 to 800°C in an inert atmosphere or under vacuum. When the product molded in a hollow shape by means of a wet or dry-wet spinning method is subjected to an infusibilization treatment by heating in the air while stretching the product with a stress of 0.002 to 0.005 MPa, a hollow fiber carbon membrane having excellent gas permeability and a further high gas separation factor (He/CH 4 ) can be obtained.

Masataka Kondo
Kensuke Watanabe
Hirokazu Yamamoto

JP2016556484A

July 18, 2018

October 09, 2015

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NOK CORPORATION

B01D71/02; B01D69/00; B01D69/08; C01B32/05; C08K3/06; C08K5/14; C08K5/33; C08L61/06; C08L71/12; D01D5/24; D01F6/94; D01F9/24; D06M11/73

JP2013071073A
JP2010188241A
JP7051551A
JP2013063415A
JP2013094744A

Toshio Yoshida
Kazuko Yoshida

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