Abstract: MCM-36 was modified by grafting ionic liquids (ILs) 1-alkyl-3-(triethoxysilylpropyl)imidazolium hydrogen sulfates (alkyl:methyl,ethyl,butyl).The modified MCM-36 catalysts (MCM-36-ILs) were characterized by ¹H-NMR,FT-IR,XPS,TGA,XRD,SEM,BET and an n-butylamine titration method.The results show that the ILs were immobilized on MCM-36 by chemical bonds.MCM-36-ILs were stable below 350℃.The immobilizing of acidic ILs led to an increase of acid amount and a certain decrease of specific surface area and average pore volume of MCM-36.The equilibrium adsorption capacities of isobutane and 1-butene on MCM-36 and MCM-36-ILs could be described well by Sip model.The adsorption behaviors of isobutane and 1-butene on MCM-36-ILs were affected by the structure of IL,the loading amount of IL and the surficial properties of solid catalyst.The adsorption molar ratio of isoparaffin to olefin (n_I/n_O) on MCM-36 could be adjusted by supporting acidic ionic liquids.In this study,an adsorption n_I/n_O of 0.95 on MCM-36 loaded by 1-ethyl-3-(triethoxysilylpropyl)imidazolium hydrogen sulfate was achieved,which approximated to the stoichiometric coefficient of C₄ alkylation process.The improvement of adsorption n_I/n_O on solid acid catalyst is beneficial to the improvement of catalyst properties and the selectivity of objective products.