Process for electrolysis of bromide containing electrolytes
US4110180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Apr 20, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/24
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In a method and apparatus for electrolyzing an aqueous bromide containing electrolyte to form bromine by passing an electrolysis current through said electrolyte between a cathode and an anode comprising at least a valve metal base which is exposed to the electrolyte over at least part of its surface, the improvement comprising maintaining a breakdown voltage at the valve metal base of the anode in excess of 2 volts (NHE) which may be effected, for example, by using a base consisting of a titanium alloy containing up to 10% by weight of at least one member of the group consisting of vanadium, zinc, hafnium, tantalum and niobium or by using a tantalum base or by the addition to the electrolyte of soluble salts of at least one metal of groups IIA, IIIA, IVA, VA, VB, VIIB and VIIIB of the Periodic Table in amounts up to 1% by weight or by the addition to the electrolyte of sulfate and/or nitrate ions in a range of 10 to 10 g/l.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.