Process for the preparation of sebacic acid

Details Process for the preparation of sebacic acid Process for the preparation of sebacic acid

C - Chemistry, Metallurgy

25

B

204/43.5

C25B 3/00 (2006.01) C25B 3/10 (2006.01)

Patent

CA 1057232

TITLE OF THE INVENTION PROCESS FOR THE PREPARATION OF SEBACIC ACID ABSTRACT OF THE DISCLOSURE A process for preparing sebacic acid of high purity in a high yield from adipic aoid by conducting the electrolytic con- densation of monomethyl adipate at a high current efficiency and a low electric cell voltage, This process is characterized in that electrolytic condensation of monomethyl adipate and an alkali salt thereof is conducted by maintaining the dimethyl sebaoate concentration in the electrolytic solution at 5% by weight or higher, and passing the electrolytic solution through an electrolytic cell at a rate of at least 2.5 m/sec, the extra- ction of dimethyl sebacate formed by the electrolysis is conducted with use of a combination of water and an organic solvent capable to dissolving dimethyl sebacate and insoluble in water, and the hydrolysis of the so recovered dimethyl sebacate is conducted by adding dimethyl sebacate to an aqueous solution of a mineral acid in a specific amount and conducting the hydrolysis while removing methanol.

191139

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