Electrolytic cell with composite, porous diaphragm

Details Electrolytic cell with composite, porous diaphragm Electrolytic cell with composite, porous diaphragm

1991-11-15

1993-02-02

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204296, C25C 1302, C25C 1308, C25C 900

Patent

active

051835452

ABSTRACT:
A composite, porous, liquid-permeable article is provided which is a multilayer structure of discrete, bonded layers of porous, expanded polytetrafluoroethylene (EPTFE). The composite has its interior and exterior surfaces coated with a perfluoro ion exchange polymer to render the composite hydrophilic so as to resist gas locking in aqueous media. Initially, the diaphragm may also contain a water-soluble surfactant to assist in initial water penetration into the pores of the composite. An improved electrolytic cell is provided having the composite diaphragm as the porous separator in the electrolysis of alkali halide solutions. The diaphragm is also useful as an improved filter medium.

REFERENCES:
patent: 4586992 (1986-06-01), Miyake et al.
patent: 4604170 (1986-08-01), Miyake et al.
patent: 4983264 (1991-01-01), Miyake et al.

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