Process for the manufacture of chloroprene

Details Process for the manufacture of chloroprene Process for the manufacture of chloroprene

C - Chemistry, Metallurgy

07

C

260/662.3

C07C 21/21 (2006.01) C07C 17/25 (2006.01)

Patent

CA 1218678

TITLE IMPROVED PROCESS FOR THE MANUFACTURE OF CHLOROPRENE ABSTRACT OF THE DISCLOSURE In improved process for the catalytic dehydrochlorination of 3,4-dichlorobutene-1 with aqueous alkali, wherein the effluent from the dehydrochlorination reactor is separated into phases, and the organic phase is steam-stripped at low temperature (below about 80°C) to recover chloroprene product, while the steam stripper heels are returned to the dehydrochlorination reactor. A small portion of the heels is purged prior to being recycled. Most of the catalyst is recovered and returned to the reaction, but a small amount of make-up catalyst is added. Chloroprene made in this process is a valuable monomer which finds use in the manufacture of a broad line of synthetic elastomers of. considerable industrial interest.

445165

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