Title:
SEPARATION MEMBRANE, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/222117
Kind Code:
A1
Abstract:
A separation membrane, a preparation method therefor and a use thereof in magnesium and lithium separation. The separation membrane comprises, in sequence, a base material layer, a porous support layer, a polyamide layer and a modification layer. Cross-linked polymers forming the modification layer comprise structural units provided by polyphenols and structural units provided by polyamines, at least some of the structural units provided by the polyphenols also being connected to the polyamide layer via ortho positions of phenolic hydroxyl groups; the pore size of the separation membrane is 0.1-0.5 nm, and the surface Zeta potential thereof is -5 mV to 30 mV. The preparation method comprises the following steps: sequentially preparing the porous support layer, the polyamide layer and the modification layer on the base material layer, a method of preparing the modification layer comprising: under a first pressure, and under conditions in which a polyphenol solution remains fluid, bringing one side of the polyamide layer into first contact with the polyphenol solution; then under a second pressure, and under conditions in which a polyamine solution remains fluid, bringing one side of the polyamide layer into second contact with the polyamine solution, to complete a self-assembly reaction.
Inventors:
WU CHANGJIANG (CN)
ZHANG YANG (CN)
LIU YIQUN (CN)
PAN GUOYUAN (CN)
YU HAO (CN)
ZHAO MUHUA (CN)
ZHAO GUOKE (CN)
TANG GONGQING (CN)
ZHANG JIANHUA (CN)
DU WENJIE (CN)
ZHANG YANG (CN)
LIU YIQUN (CN)
PAN GUOYUAN (CN)
YU HAO (CN)
ZHAO MUHUA (CN)
ZHAO GUOKE (CN)
TANG GONGQING (CN)
ZHANG JIANHUA (CN)
DU WENJIE (CN)
Application Number:
PCT/CN2023/095323
Publication Date:
November 23, 2023
Filing Date:
May 19, 2023
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC BEIJING RES INSTITUTE OF CHEMICAL INDUSTRY CO LTD (CN)
SINOPEC BEIJING RES INSTITUTE OF CHEMICAL INDUSTRY CO LTD (CN)
International Classes:
B01D71/56; B01D67/00; B01D69/12
Foreign References:
| CN109289551A | 2019-02-01 | |||
| JP2018187533A | 2018-11-29 | |||
| CN110394074A | 2019-11-01 | |||
| CN109692584A | 2019-04-30 | |||
| US20200139307A1 | 2020-05-07 | |||
| CN107875868A | 2018-04-06 | |||
| CN107158980A | 2017-09-15 | |||
| CN106807251A | 2017-06-09 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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