Title:
HOLLOW FIBER COMPOSITE MEMBRANE MODULE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2018/003949
Kind Code:
A1
Abstract:
Provided is a method for producing a hollow fiber composite membrane module having high selective permeability and a high specific surface are ratio, whereby it becomes possible to prevent the deterioration of separation layers caused by friction generated upon the insertion of the module into a housing and also prevent the deterioration in performance resulting from the deterioration of the separation layers. The production method according to the present invention comprises the steps of: (i) producing a hollow fiber membrane having, on the outer surface thereof, a first separation layer made from a polymer having an anionic functional group; (ii) winding up the hollow fiber membrane to produce a fiber bundle; (iii) inserting the fiber bundle of the hollow fiber membrane into a housing; (iv) bonding at least one end of the fiber bundle of the hollow fiber membrane with a resin and performing an opening processing; (v) bringing the outer surface of the hollow fiber membrane into contact with an aqueous solution of a modified polyvinyl alcohol having at least one cationic or anionic functional group to form a second separation layer composed of an absorption layer made from the modified polyvinyl alcohol; and (vi) bringing the second separation layer into contact with an aqueous solution of an aldehyde compound to acetalize some of hydroxyl groups in the modified polyvinyl alcohol.
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Inventors:
OHKAME TAKASHI (JP)
Application Number:
PCT/JP2017/024041
Publication Date:
January 04, 2018
Filing Date:
June 29, 2017
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B01D63/02; B01D69/02; B01D69/08; B01D69/12; B01D71/38; B01D71/52; B01D71/68; C08G65/00; D01F6/66
Domestic Patent References:
| WO2014157012A1 | 2014-10-02 |
Foreign References:
| JPS61268302A | 1986-11-27 | |||
| JP2014042913A | 2014-03-13 | |||
| JP2013223852A | 2013-10-31 | |||
| US20140175006A1 | 2014-06-26 |
Attorney, Agent or Firm:
KAZAHAYA, Nobuaki et al. (JP)
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