Title:
PREPARATION METHOD FOR CHELATING MEMBRANE FOR PURIFYING WET ELECTRONIC CHEMICALS
Document Type and Number:
WIPO Patent Application WO/2024/002382
Kind Code:
A1
Abstract:
Disclosed in the present invention is a preparation method for a chelating membrane for purifying wet electronic chemicals, comprising the following steps: carrying out hydrophilic treatment on a porous PTFE membrane to obtain a hydrophilic base membrane; cleaning a chelating resin by means of a hydrochloric acid solution, a sodium hydroxide solution, and deionized water in sequence, and then carrying out drying treatment; grinding and screening the cleaned and dried chelating resin to obtain powder; mixing the powder with polyisobutylene and a polyhexafluoroethylene emulsion, and carrying out vacuum defoaming to form a membrane coating solution; coating the hydrophilic base membrane with the membrane coating solution to prepare a chelating membrane; and sequentially using the hydrochloric acid solution, the sodium hydroxide solution, and pure water to wash the prepared chelating membrane until the prepared chelating membrane is neutral, and then drying and storing the chelating membrane. The preparation method for the chelating membrane provided by the present invention is suitable for removing trace metal ions, and consumes low energy for removing the ions.
Inventors:
DING XIAOBIN (CN)
XIANGLI FENJUAN (CN)
DAI PINGPING (CN)
WANG CHENG (CN)
XIANGLI FENJUAN (CN)
DAI PINGPING (CN)
WANG CHENG (CN)
Application Number:
PCT/CN2023/108034
Publication Date:
January 04, 2024
Filing Date:
July 19, 2023
Export Citation:
Assignee:
JIANGSU JIUMO HI TECH CO LTD (CN)
SHANDONG RESEARCH INSTITUTE OF LONG MEMBRANE TECH DEVELOPMENT CO LTD (CN)
SHANDONG RESEARCH INSTITUTE OF LONG MEMBRANE TECH DEVELOPMENT CO LTD (CN)
International Classes:
B01D71/36; B01D67/00; B01D69/12
Domestic Patent References:
| WO2000070012A1 | 2000-11-23 |
Foreign References:
| CN114904403A | 2022-08-16 | |||
| JP2017001029A | 2017-01-05 | |||
| US20080197070A1 | 2008-08-21 | |||
| JPH0321390A | 1991-01-30 | |||
| JPH0394883A | 1991-04-19 | |||
| US20180117538A1 | 2018-05-03 | |||
| US20220161201A1 | 2022-05-26 |
Attorney, Agent or Firm:
SUZHOU WISTONG INTELLECTUAL PROPERTY AGENCY (COMMON PARTNERSHIP) (CN)
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