Title:
COMPOSITE SEMIPERMEABLE MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2022/138975
Kind Code:
A1
Abstract:
A composite semipermeable membrane comprising a separate functional layer on a microporous support layer, wherein the separate functional layer contains a crosslinked fully aromatic polyamide, and wherein for positive secondary ions as measured by time-of-flight secondary ion mass spectrometry on a surface of the separate functional layer, formulas (1) and (2) are satisfied, where 'a' represents (count of m/z = 104.03)/(count of m/z = 108.06), and b represents the molar ratio of carboxy groups to amino groups as determined by analysis of the entire separate functional layer using 13C solid NMR. (1): a ≥ 5.0
(2): a/b ≥ 4.3
Inventors:
SHIMURA HARUTOKI (JP)
YASUDA TAKAAKI (JP)
MITSUI SHINYA (JP)
YASUDA TAKAAKI (JP)
MITSUI SHINYA (JP)
Application Number:
PCT/JP2021/048432
Publication Date:
June 30, 2022
Filing Date:
December 24, 2021
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D69/00; B01D69/02; B01D69/10; B01D69/12; B01D71/56; C02F1/44; C08G69/32
Domestic Patent References:
| WO2016002819A1 | 2016-01-07 | |||
| WO2017111140A1 | 2017-06-29 | |||
| WO2019168138A1 | 2019-09-06 | |||
| WO2014133130A1 | 2014-09-04 |
Foreign References:
| JP2020121264A | 2020-08-13 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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