Method of operating a diaphragm electrolytic cell

Details Method of operating a diaphragm electrolytic cell Method of operating a diaphragm electrolytic cell

2005-08-31

2009-11-17

Wilkins, III, Harry D (Department: 1795)

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Treating electrode, diaphram, or membrane during synthesis

C205S517000

Reexamination Certificate

active

07618527

ABSTRACT:
Describes a method for lowering the flow of liquid anolyte through perforations in the diaphragm of a diaphragm electrolytic cell, e.g., a chlor-alkali diaphragm electrolytic cell, comprising introducing ceramic fiber into the anolyte compartment of the electrolytic cell, e.g., during cell operation. The benefits described for lowering the flow of anolyte liquor through the diaphragm of a chlor-alkali diaphragm electrolytic cell are increasing the concentration of alkali metal hydroxide, e.g., sodium hydroxide, and decreasing the concentration of hypochlorite ion, e.g., sodium hypochlorite, in the catholyte liquor. Also describes introducing dopant material and/or fibers comprising halogen-containing polymer, e.g., fluorocarbon polymer fibers, into the anolyte compartment of the electrolytic cell in conjunction with the addition of ceramic fiber into the anolyte compartment, e.g., during cell operation.

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U.S. Appl. No. 11/184,967, entitled “Diaphragm For Electrolytic Cell,” filed Jul. 20, 2005.
U.S. Appl. No. 11/334,907, entitled “Diaphragm For Electrolytic Cell,” filed on Jan. 19, 2006.

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