Abstract: The ionic liquid[BMIM]HSO₄ was synthesized by two steps and the immolized ionic liquid catalyst [BMIM]HSO₄/Al₂O₃ was prepared by impregnation method. The catalyst was characterized by TG-DTG，BET，SEM and etc. In the synthesis of acrolein from glycerol，the effects of the load content of ionic liquid，the reaction temperature，the airspeed and the catalyst stability were studied in a continuous fixed bed reactor under atmospheric pressure. The results showed that the better condition was as follows：the temperature 300 ℃，the load weight content of ionic liquid 40% and airspeed 6 h^－1. The acrolein mole selectivity reached 90.22% and glycerol conversion rate reached 100%. After 100 hours，the yield can reach 75% by using the catalyst.

Key words: ionic liquid, immobilization, glycerol, acrolein

摘要： 采用两步法合成离子液体[BMIM]HSO4，并采用浸渍法制备了[BMIM]HSO4/Al2O3固载型离子液体催化剂，用TG-DTG、BET、SEM等方法对催化剂进行表征。在常压连续流动的固定床反应器中，考察甘油制备丙烯醛的工艺条件，重点考察了反应温度、离子液体的负载量、体积空速对反应的影响及催化剂的稳定性。结果表明，较优条件为：当催化剂为[BMIM]HSO4/Al2O3，负载量为40%、反应温度为300 ℃、体积空速为6 h－1时，丙烯醛的选择性可达90.22%，甘油的转化率为100%，且催化剂在使用100 h后仍保持75%的收率。

关键词: 离子液体, 固载, 甘油, 丙烯醛