Method for concentration and purification of a cell liquor in an electrolytic cell
US4036717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Dec 29, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S204/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a method and apparatus for the concentration and purification of a cell liquor containing sodium or potassium hydroxide wherein the three compartment electrolytic cell has a porous catalytic anode, a porous asbestos diaphragm separating the anode compartment and a central compartment having a stratification network, a cation-exchange membrane separating the central compartment and a cathode compartment having cathode disposed therein such that an electrolyzing current may be passed between the anode and cathode. Hydrogen gas emanating from the cathode and anode compartments is fed into the porous catalytic anode to decrease the potential across the cell below the evolution potential for chlorine and coincidentally reduce the power requirements of the cell, which is operated at elevated temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.