JPS5581745A - Washing method of ion exchange membrane - Google Patents
Washing method of ion exchange membraneInfo
- Publication number
- JPS5581745A JPS5581745A JP15407978A JP15407978A JPS5581745A JP S5581745 A JPS5581745 A JP S5581745A JP 15407978 A JP15407978 A JP 15407978A JP 15407978 A JP15407978 A JP 15407978A JP S5581745 A JPS5581745 A JP S5581745A
- Authority
- JP
- Japan
- Prior art keywords
- ion exchange
- exchange membrane
- acid group
- membrane
- sulphonic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
PURPOSE: To restore the property of ion exchange membrane by a method wherein a cationic ion exchange membrane with sulphonic acid group and weak acid group of which electric resistance is raised by using is contacted with an aqueous alkali metal halide solution with a specific pH range.
CONSTITUTION: A cationic ion exchange membrane having a sulphonic acid group and an acid group weaker than the said sulphonic acid is immersed in an aqueous alkali metal halide solution with a concentration of about one normal - saturated point and sufficiently contacted by continuous or intermittent stirring or by exchanging the said solution. More preferably, within the above described solution, direct current electric amount corresponding to above 5 times of ion exchanging group amount within a membrane present in an electric current applied portion is applied to the surface to be treated from a substantially right-angled direction. This electric current applying method provides a benefit for shortening a time required to restore the capacity of said membrane.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15407978A JPS5581745A (en) | 1978-12-15 | 1978-12-15 | Washing method of ion exchange membrane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15407978A JPS5581745A (en) | 1978-12-15 | 1978-12-15 | Washing method of ion exchange membrane |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5581745A true JPS5581745A (en) | 1980-06-20 |
JPS6218629B2 JPS6218629B2 (en) | 1987-04-23 |
Family
ID=15576424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15407978A Granted JPS5581745A (en) | 1978-12-15 | 1978-12-15 | Washing method of ion exchange membrane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5581745A (en) |
-
1978
- 1978-12-15 JP JP15407978A patent/JPS5581745A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6218629B2 (en) | 1987-04-23 |
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