Cathode restoration
US5205911A · kind A · utility
6Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B11/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Chlor-alkali electrolytic cells can have separators used with metal cathodes. These cells may often be subject to frequent current interruptions. Particularly where the cathode and separator exhibit extended life, these interruptions may be numerous. There has now been developed a method for providing successful and desirable cathode operation even for such extended cell life. During cell shutdown, the cathode and separator are subjected to an elevated temperature heat treatment. After heating, and optionally following any rewetting of the diaphragm, the cathode is ready in the cell for continued, rejuvenated performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.