Ni2＋的引入对离子液体烷基化催化性能的影响

Thealkylationofisobutanewithbuteneisanim portantprocessforthe productionofhigh qualitypetroleum .In placeofconcentratedsulfuricacid ,Et3NHCl/AlCl3ionicliquidhasbeenusedinthereac tionwithfairlygoodeffect1] ,butthereisstillabigdifferencecomparedwiththeresultsofconcentratedsulfuricacid .TheC8contentinthealkylatesobtainedwithconcentratedsulfuricacidwas 72 1% 2 ] ,butitwasonly 5 6 %withtheionicliquid .ThekeyreactioninthealkylationishydrogentransferfromC+8toC083] ,andthisisthemainreasonforth…

Effect of Ni2+ on Catalytic Activity of Et3NHCl/AlCl3 Ionic Liquid for Alkylation of Isobutane

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 effect1], 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 C083], 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).