Caustic and chlorine production process

Details Caustic and chlorine production process Caustic and chlorine production process

1977-04-07

1978-02-28

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, C25B 116, C25B 126

Patent

active

040766039

ABSTRACT:
Alkali metal hydroxide and chlorine are produced in a membrane-equipped electrolysis cell system in a staged manner wherein at least one cell of the system is used to generate a dilute caustic solution and wherein the subsequent cell(s) of the system are used to produce a more concentrated caustic solution by electrolysis of fresh brine and the dilute caustic produced in the first stage which is used in lieu of water in the subsequent stage(s). The stage-wise production of caustic of commercially acceptable concentration results in significant energy savings with corresponding increase in the average life of the membranes employed.

REFERENCES:
patent: 3899403 (1975-08-01), Coon et al.

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