Abstract

In thermal chlorination of butene-1, as in case of ethylene and propylene, additive chlorination predominates at lower temparature and substitutive chlorination predo-minates at higher temparature. Principal products of substitutive chlorination were 3-chlorobutene-1, l-chlorobu-tene-2 and 4-chlorobutene-l. From the composition of reaction products and the influence of nitric oxide on the reaction, at least substitutive chlorination appeared to be radical chain reaction. Propylene was chlorinated for comparison. Distribution of monochloroolefins, formed by substitutive chlorination of propylene and butene-1, was not alterd by reaction conditions such as temparature and chlorine concentration.

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