以β-溴代乙基苯为原料,溴素作溴化剂,在催化剂作用下,经过加苯环上溴反应,得到溴化产物;溴化产物在氢氧化钠和异丙醇体系中,以四丁基溴化铵作催化剂,消除溴化氢,得三溴苯乙烯。考察了催化剂种类、溶剂用量、反应温度和反应时间等对消除反应收率的影响。结果表明,以四丁基溴化铵作催化剂,反应温度30~40℃,反应时间3 h,在氢氧化钠和异丙醇体系下,产品纯度大于99%,溴含量高,性能稳定。 Brominated ethylbenzene as raw material and bromine as brominating agent, under the action of catalyst, the bromine product is obtained through the addition of bromine on the benzene ring; and the brominated product is in the system of sodium hydroxide and isopropanol, To tetrabutylammonium bromide as a catalyst to eliminate hydrogen bromide, three bromine styrene. The effects of catalyst type, solvent amount, reaction temperature and reaction time on the yield of elimination reaction were investigated. The results showed that the product purity was over 99%, the content of bromine was high and the stability was stable under the conditions of reaction temperature of 30-40 ℃ and reaction time of 3 h with tetrabutylammonium bromide as catalyst.