Title:
FORWARD OSMOSIS MEMBRANE AND FORWARD OSMOSIS MEMBRANE MODULE INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2023/276483
Kind Code:
A1
Abstract:
This forward osmosis membrane has a support membrane, and a separation functional layer on the support membrane. The support membrane has a porous support body. After water has been positioned on the separation functional layer side and a 3.5 mass% sodium chloride aqueous solution has been positioned on the porous support body side, with the forward osmosis membrane interposed therebetween, and a forward osmosis process has been performed with a transmembrane pressure difference P=100 kPa and with the porous support body side being forward, when a forward osmosis process is then performed with a transmembrane pressure difference P=20 kPa and with the porous support body side being forward, the ratio (R100/F100) of the permeated water quantity (F100, unit: kg/(m2×hr)) and the salt reverse diffusion quantity (R100, unit: g/(m2×hr)) satisfies the expression 0 g/kg≤R100/F100≤0.12 g/kg.
Inventors:
HOTTA DAISUKE (JP)
Application Number:
PCT/JP2022/020834
Publication Date:
January 05, 2023
Filing Date:
May 19, 2022
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
B01D61/00; B01D63/02; B01D69/00; B01D69/02; B01D69/08; B01D69/10; B01D69/12; B01D71/56; B01D71/68; B32B5/18
Domestic Patent References:
| WO2020059769A1 | 2020-03-26 | |||
| WO2020241860A1 | 2020-12-03 |
Foreign References:
| JP2018008270A | 2018-01-18 | |||
| JP6191102B2 | 2017-09-06 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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