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采用加压方法,在无水AlCl3催化和少量助催化剂作用下,以乙烯、叔丁基溴为原料合成新己基溴;实验表明300g叔丁基溴,在35g催化剂的催化下,最佳的反应条件是150mL正己烷作溶剂,反应压力控制在0.9～1MPa、反应时间为2h,产物卤代新己烷的收率达到88%;N-甲基吡咯烷酮为溶剂,采用反应精馏的方法,溴代新己烷脱溴化氢制备新己烯,直接可得到纯度达98%的产品。溶剂和溴元素可以循环使用,节省了原料和减少了污染。
Under the action of anhydrous AlCl3 and a small amount of cocatalyst, the new hexyl bromide was synthesized by using ethylene and t-butyl bromide as the raw materials. The best reaction of 300 g of t-butyl bromide under the catalysis of 35 g of catalyst was achieved. The conditions are 150mL n-hexane as solvent, the reaction pressure is controlled at 0.9 ~ 1MPa, the reaction time is 2h, the yield of halogenated new hexane reached 88%; N-methylpyrrolidone as the solvent, the method of reactive distillation, bromine On behalf of new hexane dehydrobromination of new hexene, can be directly obtained 98% purity of the product. Solvents and bromine can be recycled, saving raw materials and reducing pollution.