Mediated hydrohalic acid electrolysis
US7341654B2 · kind B2 · utility
7Cited by
12References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2003 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Apr 17, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/26
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Chlorine is produced by electrolysis of aqueous HCl, in a membrane electrolyzer, using cathodic mediators such as Fe(III) and/or Cu(II) chlorides and a non-catalysed 3-dimensional cathode, with the real surface area at least ten times higher than its projected area. The HCl electrolysis section is combined with an oxidizer for regeneration of the mediator, product water removal step and optional HCl recovery step. Under optimized conditions chlorine can be produced at very high current densities of 30 kA/m2, without initiating undesired H2 evolution reaction at the cathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.