Production of polysulphide by electrolysis of white liquor containing sulphide
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United States of America Patent
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Apr 29, 1997
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N/A
app pub date -
Dec 18, 1995
filing date -
Jun 28, 1993
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Abstract
Sulphide-containing white liquor is treated in a continuously operating electrolytic cell having separate anode and cathode compartments separated by a partially permeable barrier. White liquor is introduced into the anode compartment of the cell, and an aqueous solution of alkali metal hydroxide is introduced into the cathode compartment of the cell so that sulphide is oxidized in the anode compartment, while at the same time alkali metal cations are transported through the barrier into the cathode compartment, where water reacts to form hydroxide ions. An electrolytic cell suited for implementing the method is also disclosed.
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