ALKYLATION METHOD USING IONIC LIQUID AS CATALYST

摘要

Disclosed is an alkylation method using an ionic liquid as catalyst, which comprises separating a fraction with enriched alkyl halide from the alkylation product by distillation or adsorption and recycling it to the reaction system in the alkylation process, wherein the cation of the said ionic liquid catalyst comes from a hydrohalide of an alkyl-containing amine, imidazole or pyridine, and the anion comes from one or more metal compounds. The method can make good use of the alkyl halide in the alkylation product and prolong the service life of the ionic liquid catalyst. At the same time, the method reduces the halide concentration in the alkylate oil as well.