Chemistry: electrical and wave energy – Processes and products
Patent
1979-03-19
1980-05-27
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204128, C25B 126, C25B 116
Patent
active
042049210
ABSTRACT:
Deposits of alkali metal ions such as calcium and magnesium on chlor-alkali cathodes and diaphragms are removed by feeding an acid such as hydrochloric acid into the cathode feed in an amount sufficient to reduce the pH below 8 for a time sufficient to remove these deposits and restore the cell to normal operation. The use of this invention allows one to use relatively high hardness water as the cathode feed solution during normal operation of a membrane chlor-alkali cell.
REFERENCES:
patent: 4040919 (1977-08-01), Eng
patent: 4118308 (1978-10-01), Specht
Britton Wayne E.
Krumpelt Michael
Andrews R. L.
BASF Wyandotte Corporation
Linkhauer John W.
Michaels Joseph D.
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