Electrolysis of aqueous solution of alkali metal chloride
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United States of America Patent
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Feb 17, 1981
Issued Date -
N/A
app pub date -
Aug 8, 1979
filing date -
Oct 21, 1977
priority date (Note) -
Expired
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Abstract
An electrolysis of an aqueous solution of an alkali metal chloride is carried out to produce an alkali metal hydroxide having a concentration of 30 wt. % or more and chlorine by using a modified cation exchange membrane of a fluorinated polymer having carboxylic acid type ion exchange groups, which has an ion exchange capacity of 1.0 to 2.2 meq/g.dry polymer and at least one of whose surface layer has lower ion exchange capacity which is from 45 to 95% of that of the main part.
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