Electrolytic purification and reconcentration of wash and rinse

Details Electrolytic purification and reconcentration of wash and rinse Electrolytic purification and reconcentration of wash and rinse

1983-03-30

1984-05-01

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, 204151, C25B 116, C25B 100, C02F 146

Patent

active

044459874

ABSTRACT:
Diluted and contaminated caustic solutions coming from the regeneration and washing of ion exchange resins may advantageously be purified and reconcentrated to be reused during the subsequent regeneration cycles, by subjecting the contaminated solution to electrolysis in the anodic compartment of an electrolytic cell provided with a cation-exchange membrane and recovering concentrated and purified caustic solution from the cathodic compartment of the cell, whereto demineralized water is fed.
The process of the invention may advantageously be carried out in subsequent electrolytic stages in order to maintain optimum working conditions and a high overall efficiency of the process.

REFERENCES:
patent: 3681214 (1972-08-01), Ionescu et al.
patent: 4078978 (1972-03-01), Zirniebl
patent: 4202743 (1980-05-01), Oda et al.
patent: 4260463 (1981-04-01), Rideout

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