中文摘要：

采用溶胶-凝胶法将杂多酸功能化离子液体bmim—PW12（1）固载到硅胶上制得硅胶固载杂多酸功能化离子液体催化剂bmim·PW12／SiO2[2-x（x=5，15，25，35，50）]，采用TG—DTG，FT-IR，N2低温吸附脱附，XRD和正丁胺电位滴定等方法表征2的结构、织构性能和酸性。结果表明，2-x保持了1的Keggin结构，且1被较好地固载在硅胶上；2-x具有大的比表面积和强酸性。用7％的2—35催化乙酸与正丁醇的酯化反应，收率88．5％，且2-35重复使用5次后收率仍可达到75．4％。

英文摘要：

Immobilized heteropolyacid functionalized ionic liquids catalyst bmim-PW12/SiO2 [ 2-x （x = 5, 15, 25, 35, 50） ] were prepared by sol-gel techniquse of heteropolyacid functionalized ionic liquids bmim-PWi2 （1） supported on SiO2. The structure, texture and acidic of 2-x were characterized by TG, IR, N2 adsorption/desorption, XRD and potentiometric titration. The results showed that 2-x maintained Keggin structure of 1, and 1 was confired on silica gel. 2-x also exhibited good dispersibility and strong acidity. The catalytic performances of 2-x were investigated in esterification of acetic acid with butanol. The yield of n-butyl acetate was 88.5% using 7% 2-35 as the catalyst, and the yield still reached 75.4% after 2-35 reused times 5 .