Electrohydrodimerization process improvement and improved electr

Chemistry: electrical and wave energy – Processes and products

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204 73A, C26B 300

Patent

active

042071518

ABSTRACT:
An improvement in an electrolytic hydrodimerization process for hydrodimerizing an olefinic compound such as acrylonitrile to form a dimerized product such as adiponitrile in which an aqueous electrolyte solution comprised of the olefinic compound, a directive salt (providing quaternary ammonium cations) and a conductive salt is electrolyzed in a reaction cell, the aqueous solution is purged from the reaction cell, and subjected to a series of steps involving the recovery of the product, the directive salt and the conductive salt, the recovered salts being used to reconstitute the aqueous solution, the improvement being a functionally coordinated evaporation step which permits a higher rate and more efficient recovery of product and salts, a higher purge rate and a substantially higher yield of the dimerized product. The invention also constitutes an improved electrolyte recovery process.

REFERENCES:
patent: 3267131 (1966-08-01), Campbell et al.
patent: 3493597 (1970-02-01), Campbell et al.
patent: 3898140 (1975-08-01), Lester et al.
patent: 3966566 (1976-06-01), Lester et al.

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