Voltage reduction of membrane cell for the electrolysis of brine
US4040919A · kind A · utility
14Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1976 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Feb 11, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B15/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The voltage drop in a three compartment membrane cell used for the electrolysis of brine is diminished by treatment of the anolyte with acid, preferably hydrochloric acid, lowering the caustic concentration in the buffer zone and decreasing the current density for a period of time, during which the membrane adjacent to the anolyte is rejuvenated, and then resuming normal operations. In a similar manner the voltage drop in a two compartment membrane cell may be reduced, with the lowering of the caustic concentration being effected in the catholyte, preferably by dilution with water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.