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Title:
SEPARATION MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2022/059369
Kind Code:
A1
Abstract:
The present invention provides a separation membrane which is suitable for separating water from a liquid mixture comprising an alcohol and water and which, even when used over a long period, can be inhibited from decreasing in separating performance. This separation membrane 10 includes a polyimide having structural unit X, which is represented by formula (1), and structural unit Y, which is represented by formula (2). A1 is a linking group containing no arylene group in the main chain and having a solubility parameter, as determined by the Fedors method, exceeding 5.0 (cal/cm3)1/2. A2 is a tetravalent organic group including an arylene group.

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Inventors:
YOSHIMURA KAZUYA (JP)
SHIMIZU HISAE (JP)
KATAGIRI MAKOTO (JP)
Application Number:
PCT/JP2021/028682
Publication Date:
March 24, 2022
Filing Date:
August 02, 2021
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
International Classes:
B01D71/64; B01D61/36; C08G73/14
Domestic Patent References:
WO2020084996A12020-04-30
Foreign References:
JPH04110030A1992-04-10
JPH03284335A1991-12-16
JPH0235923A1990-02-06
JP2003038942A2003-02-12
Other References:
ROBERT F. FEDORS, POLYMER ENGINEERING AND SCIENCE, vol. 14, 1974, pages 147 - 154
Attorney, Agent or Firm:
KAMADA Koichi et al. (JP)
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