Electrolytic process for preparing metal sulfonates
US6790338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for preparing metal salts of organic sulfonic acids such as tin alkane sulfonates by electrolysis is described. The method comprises:(A) providing a membraneless electrolytic cell having an upper section and a lower section, and comprising:(i) a metal anode positioned in the lower section of the electrolytic cell, and(ii) a cathode positioned in the upper section of the electrolytic cell,(B) charging to the cell, an aqueous solution of an organic sulfonic acid,(C) passing a current through the cell whereby the metal of the anode dissolves in the sulfonic acid and forms the desired metal sulfonate,(D) accumulating the metal sulfonate in a lower portion of the lower section of the cell, and(E) recovering an aqueous solution of the desired metal sulfonate from the lower portion of the lower section of the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.