Process and apparatus for electrolysis of hydrochloric acid
In the production of chlorine and hydrogen from hydrochloric acid by electrolysis in an electrolysis cell comprising a plurality of vertically arranged bipolar electrodes, a diaphragm arranged between each two electrodes to divide the electrolysis chambers formed between them into an anolyte chamber and a catholyte chamber, and outlet and inlet devices for the electrolyte, the improvement which comprises electrolyzing the hydrochloric acid in at least two successive stages, and degassing the hydrochloric acid. Advantageously the hydrochloric acid moves from bottom to top, first through an upper stage and then through a lower stage. As a result less electrode surface is needed, a higher current density and/or voltage is possible so existing apparatus can be modified to connect more bipolar electrodes in series.
- Assignee:
- Bayer Ag (Germany, Federal Republic Of)
- Patent Number(s):
- US 4236983
- OSTI ID:
- 6603871
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
080101* -- Hydrogen-- Production-- Electrolysis
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
CHLORINE
DESIGN
ELECTROLYSIS
ELECTROLYTIC CELLS
ELEMENTS
HALOGENS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
INORGANIC ACIDS
LYSIS
NONMETALS
PRODUCTION