Title: Method for recovering current efficiency
Application Number: 86100211 Application Date: 1986.01.17
Publication Number: 1002322 Publication Date: 1986.08.13
Approval Pub. Date: 1991.08.14 Granted Pub. Date: 1991.08.14
International Classifi-cation: C25B1/46;C25B13/08;C25B15/00
Applicant(s) Name: Asahi Glass Co., Ltd. JP) Address:
Inventor(s) Name: Isamu Takeshita;Manabu Suhara
Attorney & Agent: ZHAO YUE
Abstract:
    In the electrolysis of sodium chloride by means of a perfluoro cation exchange membrane for the production of sodium hydroxide having a concentration of from 32 to 40% by weight, a method for restoring the current efficiency, which comprises suspending the electrolysis when the current efficiency of the perfluoro cation exchange membrane has dropped to a predetermined level, and maintaining the catholyte concentration at a level of not higher than 30% by weight.
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