Method of stabilizing metal-silica complexes in alkali metal halide brines
US4515665A · kind A · utility
5Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Oct 24, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/46
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for stabilizing metal-silica, particularly aluminum-silica colloidal complexes in an alkali metal halide, particularly sodium chloride, brine used as an anolyte feedstock for membrane electrolytic cells. Such stabilization is achieved by modifying the startup procedure of the cell so as to promote a sufficient level of hydroxyl ion backmigration during electrolysis so as to keep the pH of said brine at a value about 3.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.