Method for producing a carbon hollow fiber membrane

Patent metadata

Field	Value
Publication number	US-10150086-B2
Application number	US-201515535256-A
Country	US
Kind code	B2
Filing date	Dec 11, 2015
Priority date	Dec 12, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A hollow fiber carbon membrane is produced by preparing a membrane-forming dope for carbon membranes by dissolving 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 0.2 to 3.0 wt. % based on the polyphenylene oxide, in a solvent capable of dissolving these components; preparing the membrane-forming dope for carbon membranes into a hollow shape by means of a spinning method in accordance with a non-solvent induced separation method using a double annular nozzle; performing a crosslinking treatment at 200 to 240° C. in the air; then performing an infusibilization treatment by heating at 250 to 350° C.; and further performing a carbonization treatment by heating at 450 to 850° C. in an inert atmosphere or under vacuum.

First claim

The invention claimed is:

1. A method for producing a hollow fiber carbon membrane by preparing a membrane-forming dope for carbon membranes by dissolving 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 0.2 to 3.0 wt. % based on the polyphenylene oxide, in a solvent capable of dissolving these components; preparing the membrane-forming dope for carbon membranes into a hollow shape by means of a spinning method in accordance with a non-solvent induced separation method using a double annular nozzle; performing a crosslinking treatment at 200 to 240° C. in the air; then performing an infusibilization treatment by heating at 250 to 350° C.; and further performing a carbonization treatment by heating at 450 to 850° C. in an inert atmosphere or under vacuum.

2. The method for producing a hollow fiber carbon membrane according to claim 1 , wherein after the carbonization treatment, the surface is further subjected to chemical vapor deposition using hydrocarbon gas.

3. A hollow fiber carbon membrane produced by the method for producing according to claim 1 .

4. A hollow fiber carbon membrane produced by the method for producing according to claim 2 .

Assignees

• Nok Corp

Inventors

• Watanabe Kensuke
• Yamamoto Hirokazu

Classifications

• D01F9/24

  from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• B05D1/60

  Deposition of organic layers from vapour phase (vapour phase deposition in general C23C14/00, C23C16/00) · CPC title

• B01D67/0088

  Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title

• D01D1/02

  Preparation of spinning solutions · CPC title

• B01D69/08

  Hollow fibre membranes (manufacture of hollow fibres D01D5/24, D01F1/08) · CPC title