Process for chloro-alkali electrolysis cell
US4217186A · kind A · utility
55Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1979 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Apr 2, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/46
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved process and apparatus for pH control and energy savings in chlor-alkali electrolysis cells is disclosed wherein a fuel cell type spaced porous catalytic anode is utilized to chemically oxidize a controlled, sub stoichiometric amount of hydrogen to provide hydrogen ions to a recirculating anolyte. The pH is monitored and the flow of hydrogen fuel adjusted to provide a resultant desired pH in the range of about 2 to about 4. Optionally, hydrogen gas produced at the cell cathode may comprise the fuel supply and a spaced porous catalytic cathode may be employed for hydrogen supply control and depolarization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.