| 摘要 |
Liquid phase chlorination in an evaporatively cooled reactor of 1,3-butadiene to 3,4-dichlorobutene-1 and 1,4-dichlorobutene-2 by contacting 1,3-butadiene and elemental chlorine in a solvent at a temperature of 25 DEG -100 DEG C. said solvent being butane or pentane or a fluorinated solvent of the formula (CR3)(CR'2)m(CR''2)nR where R is independently hydrogen, fluorine, chlorine or bromine, R' is hydrogen, R'' is independently fluorine, chlorine or bromine, m and n are 0-3 with the proviso that terminal carbon atoms are independently perhalogenated or fully hydrogenated, the solvents boil at -15 DEG C. to 40 DEG C. at atmospheric pressure, and the solvent to dichlorobutene ratio is from 2.0:1 to 11:1. The heat of reaction is removed by vaporization of solvent and 1,3-butadiene and returning the ingredients to the reactor.
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