Method for producing hollow fiber carbon membrane
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United States of America Patent
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Aug 15, 2017
Grant Date -
Jan 14, 2016
app pub date -
Feb 26, 2014
filing date -
Feb 27, 2013
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Abstract
Disclosed is a method for producing a hollow fiber carbon membrane using a hollow fiber carbon membrane-forming material by means of a dry method or dry-wet method comprising a spinning step, a drying step, an infusibilization step, and a carbonization step as basic steps; wherein in the infusibilization step, heat treatment is performed at least two times at different temperatures, with the second temperature being higher than the first temperature. It is preferable that the second heat treatment is performed directly after the first treatment is performed, without once cooling to room temperature. The obtained hollow fiber carbon membrane has improved permeability, without reducing its separation coefficient.
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