Production of porous diaphragms

Details Production of porous diaphragms Production of porous diaphragms

1978-10-30

1982-07-27

Edmundson, F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25B 1304, C25B 1308

Patent

active

043416144

ABSTRACT:
A method of manufacturing a porous diaphragm of an organic polymeric mateial, e.g. of polytetrafluoroethylene, suitable for use as a diaphragm in an electrolytic cell, the method comprising forming a sheet of organic polymeric material containing particulate dextrin, for example by heating a starch-containing sheet, optionally in the presence of acid, to convert the starch in the sheet to dextrin, and extracting the dextrin from the sheet, for example by contacting the sheet with caustic alkali and/or with alkali metal hypochlorite.

REFERENCES:
patent: 3930979 (1976-01-01), Vallance
patent: 4003818 (1977-01-01), Juillard et al.
Hackh's Chem. Dict., 3rd Ed. by Grant, p. 262, Pub. by Blakiston, Philadelphia.

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