Summary
In the dehydrogenation of chloroethylbenzene over a mixed oxide catalyst in presence of water vapor at 600° at space velocities of 0.2–0.35 h−1 up to 36% of chlorostyrene is formed (yield based on the amount of chloroethylbenzene passed). In the treatment of chlorobenzene in presence of water under the same conditions the chlorine is retained in the nucleus, but when hydrogen is the diluent there is considerable breakdown of the chlorobenzene (50%) with formation of benzene and hydrogen chloride.
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