Title:
SEPARATION MEMBRANE, AND SEPARATION MEMBRANE MODULE
Document Type and Number:
WIPO Patent Application WO/2022/071047
Kind Code:
A1
Abstract:
In the past, fibrous separation membranes having separation layers that have inorganic materials as main components have been presented with problems in that, due to the effects of stress caused by stretching, contraction, etc., during use of a separation membrane in a separation membrane manufacturing step or a separation/purification step, crack-form defects readily appear in a separation layer, these defects occurring even more readily under high-pressure conditions. Moreover, when a crack-form defect produced in a separation layer is larger than an article subject to separation, the article subject to separation leaks out through the defect. Therefore, there is a demand to suppress such defects. The present invention is a fibrous separation membrane having a separation layer that has an inorganic material as a main component, wherein the smaller angle from among angles formed by a separation layer orientation direction and the fiber axis of the separation membrane is 3-87 degrees, where the separation layer orientation direction is a direction perpendicular to a peak intensity bearing, and the peak intensity bearing is a bearing at which the average light intensity at 18.0-20.3 nm-1 in a diffraction vector q reaches a maximum peak intensity in wide-angle X-ray diffraction measurement in which measurement is carried out upon incidence of X-rays on the separation layer from a direction normal to the fiber axis of the separation membrane.
Inventors:
YAMASHITA YUKI (JP)
MIHARA TAKAAKI (JP)
MIHARA TAKAAKI (JP)
Application Number:
PCT/JP2021/034744
Publication Date:
April 07, 2022
Filing Date:
September 22, 2021
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/00; B01D69/02; B01D69/08; B01D69/10; B01D69/12; B01D71/02
Domestic Patent References:
| WO2020158845A1 | 2020-08-06 | |||
| WO2019235315A1 | 2019-12-12 |
Foreign References:
| JP2016194179A | 2016-11-17 | |||
| US20140166571A1 | 2014-06-19 |
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