一、综述烯烃是重要的有机化工原料,不仅在有机合成上用它作原料,而且在有机反应中也用作溶剂,如环已烯.低级烯烃工业上主要由石油的裂解得到,有时也利用醇在催化剂存在下,进行高温催化脱水来制取.实验室主要是醇脱水及卤代烃脱卤化氢来制备. I. Overview Olefins are important organic chemical raw materials, not only used as raw materials in organic synthesis, but also used as solvents in organic reactions such as cyclohexene. Lower olefins are mainly obtained from the cracking of petroleum in the industry and are sometimes utilized Alcohol in the presence of the catalyst, the high temperature catalytic dehydration to take the laboratory mainly alcohol dehydration and halogenated hydrocarbon dehydrohalogenation to prepare.