Ni2+的引入对离子液体烷基化催化性能的影响

摘要

@@ The alkylation of isobutane with butene is an important process for the production of high quality petroleum. In place of concentrated sulfuric acid, Et3NHCl/AlCl3 ionic liquid has been used in the reaction with fairly good effect[1], but there is still a big difference compared with the results of concentrated sulfuric acid. The C8 content in the alkylates obtained with concentrated sulfuric acid was 72.1%[2], but it was only 56% with the ionic liquid. The key reaction in the alkylation is hydrogen transfer from C+8 to C08[3], and this is the main reason for the difference between the ionic liquid and concentrated sulfuric acid. In the present paper, a nickel promotor was added to Et3NHCl/AlCl3 ionic liquid, and the modified ionic liquid was used to catalyze the alkylation reaction with/without hydrogen. The structure of the modified ionic liquid was analyzed using FABMS (fast atom bombardment mass spectrometry).