Porous diaphragms
US3930979A · kind A · utility
21Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Jun 27, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B13/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for the manufacture of a porous diaphragm of a synthetic material, especially polytetrafluoroethylene, which comprises forming a sheet of the synthetic material in admixture with a solid particulate additive (eg starch) to be removed therefrom, introducing said sheet into a cell, and removing the solid particulate additive from the sheet by treating the sheet in situ in the cell with an acid (eg hydrochloric acid) containing a corrosion inhibitor (eg propargyl alcohol). The porous diaphragms are especially suitable for use in diaphragm cells for the production of chlorine from sodium chloride brine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.