改性离子液体中异丁烷与丁烯的烷基化反应

ALKYLATION OF ISOBUTANE AND BUTENE IN IONIC LIQUIDS

向由无水三氯化铝和盐酸三乙基胺合成的离子液体中溶入不同过渡金属(铜、铁、锌等)离子,考察它们对离子液体催化异丁烷与丁烯烷基化反应性能的影响。结果表明:过渡金属离子的加入能不同程度地影响离子液体的催化性能。溶入Cu2+和Cu+后,离子液体的催化性能有显著的改善,当Cu2+的摩尔加入量为三氯化铝的5%时,烷基化油收率达到丁烯体积的178%,对C8的选择性为75%,烷基化油辛烷值(RON)为92 2,并且离子液体可以重复使用。

Compared with concentrated sulfur acid, ionic liquids synthesized by friethylamine hydrochloride and anhydrous AlCl3 were not excellent catalysts for the alkylation of isobutane with butene for the low selectivity of C8 in alkylate and low octane number of alkylate Different ions of transition metals such as copper, iron and zinc were dissolved in ionic liquids, in order to improve the catalytic properties of ionic liquids The experiments results indicated that, after dissolution of Cu2+ and Cu+, the catalytic properties of ionic liquids were greatly improved When the mol quantity of Cu2+ dissolved was 5% of those of AlCl3 in ionic liquids, alkylation results from ionic liquids is comparable with those obtained with concentrated sulfur acid: the yield of alkylate reaching 178% of the volume of butene inputted, the selectivity of C8 reaching 75% and the octane number of alkylate reaching 922(RON) Moreover, ionic liquids could be reused