ALKYLATION OF ISOBUTANE WITH BUTENE IN IONIC LIQUIDS

Ionic liquid containing different anions or cations was synthesized. The alkylation of isobutane with butene in ionic liquid was investigated in an autoclave. The experimental results indicate that ionic liquids synthesized by anhydrous AlCl\-3 can effectively catalyze alkylate. Its catalytic activity came from [Al 2Cl 7] -. The type of cation has some influences on the selectivity of products. The experiment shows the advantages of easy separation of products from reaction mixture and reuse of ionic liquids. Further experiments show that reaction temperature, ratio of isobutane to butene and reaction time have some effects on alkylation. Under the conditions of 40 in volume ratio of isobutane to butene, 65℃ of reaction temperature and 2 minutes of reaction time, the yield of alkylates can get up 156 percent corresponding to the inputted volume of butene. The total mass concentration of C\-8 in alkylate was 57 percent. The ionic liquid can be reused in alkylation.