ALKALI METAL CARBONATES IN A CELL HAVING A CARBOXYL MEMBRANE

An alkali metal carbonate substantially free of alkali metal chloride is efficiently produced by electrolyzing an alkali metal chloride in an electrolytic cell having anolyte and catholyte compartments separated by a cation-exchange hydraulically impermeable membrane comprised of a thin film of a fl...

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Bibliographic Details
Main Authors CHARLES JOSEPH HORA, KEVIN JOSEPH O'LEARY, DONALD LOUIS DERESPIRIS
Format Patent
LanguageEnglish
Published 16.09.1982
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
APPARATUS THEREFOR
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS
GENERAL PROCESSES OF COMPOUNDING
INORGANIC CHEMISTRY
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:An alkali metal carbonate substantially free of alkali metal chloride is efficiently produced by electrolyzing an alkali metal chloride in an electrolytic cell having anolyte and catholyte compartments separated by a cation-exchange hydraulically impermeable membrane comprised of a thin film of a fluorinated polymer having pendant carboxylic acid or alkali metal carboxylate groups and a cathode spaced apart from the membrane, injecting into the catholyte compartment of the cell carbon dioxide in a quantity sufficient to convert substantially all the alkali metal hydroxide forming therein to the alkali metal carbonate salt, and utilizing a magnitude of electrolyzing current that reduces alkali metal chloride in the catholyte solids to less than 400 ppm.
Bibliography:Application Number: AU19780038095