JPS5554581A - Improved electrolyzing method of aqueous alkali chloride solution - Google Patents
Improved electrolyzing method of aqueous alkali chloride solutionInfo
- Publication number
- JPS5554581A JPS5554581A JP12689678A JP12689678A JPS5554581A JP S5554581 A JPS5554581 A JP S5554581A JP 12689678 A JP12689678 A JP 12689678A JP 12689678 A JP12689678 A JP 12689678A JP S5554581 A JPS5554581 A JP S5554581A
- Authority
- JP
- Japan
- Prior art keywords
- ion exchange
- aqueous alkali
- membrane
- fluorine
- surface layer
- 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
Abstract
PURPOSE: To enhance current efficiency and lower voltage by modifying the surface layer of the fluorine-contained cation exchange membrance which has COOH groups as ion exchange groups and is limited in ion exchange capacity, under the specific conditions thereby producing alkali hydroxide of low concentration.
CONSTITUTION: The surface layer portions of the fluorine-contained cation exchange membrane of the dry resin which has COOH groups as ion exchange groups and is of 1.1W2, particularly 1.2W1.7 milli equivalent/g in ion exchange capacity are contacted with an aqueous alkali hydroxide solution of a concentration above 40% at 80°C or more. Thereby, the ion exchange capacity of the membrane surface layer portions is lowered to 45W95% (0.8W1.3 mill equivalent/g dry resin) that of the membrane body portions. Next, the aqueous alkali chloride solution is electrolyzed by using the resultant moldified fluorine-contained cation exchange membrane, whereby alkali hydroxide and Cl2 of concentrations 15W30% are produced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12689678A JPS5554581A (en) | 1978-10-17 | 1978-10-17 | Improved electrolyzing method of aqueous alkali chloride solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12689678A JPS5554581A (en) | 1978-10-17 | 1978-10-17 | Improved electrolyzing method of aqueous alkali chloride solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5554581A true JPS5554581A (en) | 1980-04-21 |
| JPS6240433B2 JPS6240433B2 (en) | 1987-08-28 |
Family
ID=14946547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12689678A Granted JPS5554581A (en) | 1978-10-17 | 1978-10-17 | Improved electrolyzing method of aqueous alkali chloride solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5554581A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0479108U (en) * | 1990-11-20 | 1992-07-09 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281098A (en) * | 1975-12-29 | 1977-07-07 | Tokuyama Soda Co Ltd | Electrolysis of aqueous solution of alkali metals |
-
1978
- 1978-10-17 JP JP12689678A patent/JPS5554581A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281098A (en) * | 1975-12-29 | 1977-07-07 | Tokuyama Soda Co Ltd | Electrolysis of aqueous solution of alkali metals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6240433B2 (en) | 1987-08-28 |
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