Chloroaluminat Ionic Liquid抯Preparation And Catalysts In Alkylation

Ionic liquid as a new, environmentally friendly catalyst and solvents in the chemical industry will have broad prospects for application. The catalysis of chloroaluminate ionic liquids in alkylation process is studied in this article,ionic liquid's synthesis, supported ionic liquid's preparation and catalyst performance were included in the article.Ionic liquids are synthesized by different cation, such as pyridine;4-methyl-pyridine , imidazole and aluminum trichloride as anion. In order to improve the synthetical efficiency, the microwave assisted synthesis of [BMIm]Cl have been studied. From the orthogonal experimental result, the pure products have been gained and efficiency was improved. The alkylation of benzene with alkene catalyzed is investigated. Raw material and products are analyzed by gaschromatogram. Ionic liquids's composition, weight, active, stability are studied, some technical conditions are tested. Through analysis the experiment datum, in this response the catalyst's selectivity and activity are higher. In the alkylation process of benzene, the ratio of benzene to olefin, the composition of catalysts, temperature and length of time have little effect on the conversion of olefin, but have effect on the selectivity of 2-alkyl-benzene.Besides, immobilization of chloroaluminate ionic liquid on mesoporous silica by processes was carried out also. The catalytic properties of the immobilized catalyst for benzene alkylation with 1-hexen were studied and compared with the same type of common IL. The reaction selectivity of the immobilized chloroaluminate ionic liquid have good selectivity of 2-alkyl-benzene.