METHOD FOR MANUFACTURING ASYMMETRIC HOLLOW FIBER MEMBRANE FOR SEPARATING FLUORINATED GASES, AND ASYMMETRIC HOLLOW FIBER MEMBRANE FOR SEPARATING FLUORINATED GASES MANUFACTURED THEREBY

Title:

METHOD FOR MANUFACTURING ASYMMETRIC HOLLOW FIBER MEMBRANE FOR SEPARATING FLUORINATED GASES, AND ASYMMETRIC HOLLOW FIBER MEMBRANE FOR SEPARATING FLUORINATED GASES MANUFACTURED THEREBY

Document Type and Number:

WIPO Patent Application WO/2016/002990

Kind Code:

A1

Abstract:

The present invention provides a method for manufacturing an asymmetric hollow fiber membrane for separating fluorinated gases, comprising the steps of: i) mixing a fluorine-containing polyimide resin, a solvent, and a poor solvent so as to obtain a dope solution; ii) supplying the dope solution to a spinning nozzle and discharging the same; iii) making the discharged dope solution come into contact with a coagulating liquid so as to form asymmetric hollow fibers; and iv) winding, washing and drying the hollow fibers formed in step iii) so as to manufacture an asymmetric hollow fiber membrane. The asymmetric hollow fiber membrane for separating fluorinated gases, manufactured according to the present invention, simultaneously has improved nitrogen permeability and nitrogen selectivity against fluorinated gases, and has excellent mechanical properties, and thus can be applied to a process for concentrating or collecting the fluorinated gases from a mixture of fluorinated gases and nitrogen.

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Inventors:

KOH HYUNG CHUL (KR)
HA SEONG YONG (KR)
LEE CHUNG SEOP (KR)
MOON JONG-CHUL (KR)
KIM SE JONG (KR)

Application Number:

PCT/KR2014/005980

Publication Date:

January 07, 2016

Filing Date:

July 04, 2014

Export Citation:

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Assignee:

AIRRANE CO LTD (KR)

International Classes:

B01D71/64; B01D67/00

Foreign References:

JP2000342944A	2000-12-12
JPH0970523A	1997-03-18
JP2012210607A	2012-11-01
KR20120071458A	2012-07-03
KR20100013617A	2010-02-10
KR20140120501A	2014-10-14

Attorney, Agent or Firm:

CHUNG HYUN PATENT & LAW FIRM (KR)
특허법인 충현 (KR)

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