摘要
以氯化正丁基吡啶-三氯化铝(bpc-AlCl3)离子液体为催化剂,考察了离子液体催化剂的酸度、反应温度、反应压力、苯与丙烯摩尔比、反应时间等因素对苯与丙烯烷基化反应的影响。结果表明,酸性离子液体具有较高的催化活性与选择性,并且离子液体的活性与其酸度密切相关,酸度越大,离子液体的催化活性越好。在50℃、常压、反应时间1h、苯与丙烯摩尔比为10、AlCl3与bpc 摩尔比为2．00时,丙烯转化率为100％,异丙苯选择性为97．56％;离子液体可以循环使用,重复使用4次后,丙烯转化率和异丙苯选择性均无明显变化。
Ionic liquid based on n-butylpyridinium chloride （bpc） and aluminum chloride was used to catalyze the alkylation reaction of benzene with propylene in laboratory. The effects of ionic liquid acidity, molar ratio of benzene to propylene, reaction temperature, reaction pressure and reaction time on the alkylation reaction were studied. The results showed that the acidic ionic liquids exhibited higher activity and selectivity as compared with the neutral ionic liquid, and the activity of the ionic liquid increased with the increase of the ionic liquid acidity. Under the optimal conditions of 50℃, 1 atm. , a reaction time of 1 h, the molar ratios of benzene/propylene and AlCl3/bpc of 10 and 2.00 respectively, the propylene conversion reached 100% and the cumene selectivity was 97. 56%. Further more, the ionic liquid as a catalyst for such reaction could be recycled, and the catalyst activity and selectivity had minor changes after 4 cycles.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2006年第3期14-18,共5页
Petroleum Processing and Petrochemicals
基金
国家自然科学基金资助项目(20276038)
关键词
离子液体
烷基化反应
催化剂
苯
丙烯
ionic liquid
alkylation reaction
catalyst
benzene
propylene
