离子液体催化合成对叔丁基甲苯  

Synthesis of p-tert-butyl toluene catalyzed by ionic liquid

作　　者：高凯丽[1] 杨雪[1] 罗国华[1] 徐新 

机构地区：[1]北京石油化工学院化学工程学院燃料清洁化及高效催化减排技术北京市重点实验室,北京102617

出　　处：《工业催化》2017年第7期63-68,共6页Industrial Catalysis

摘　　要：以甲苯和氯代叔丁烷为原料,以三氯化铝离子液体为催化剂,考察合成对叔丁基甲苯的影响因素。结果表明,该烷基化反应最佳工艺条件为:反应温度0℃,离子液体用量为甲苯质量的1%,甲苯与氯代叔丁烷物质的量比2∶1,此条件下,氯代叔丁烷转化率100%,目标产物对叔丁基甲苯选择性较高。向三氯化铝离子液体中加入氯化亚铜改性助剂,当三氯化铝离子液体和氯化亚铜物质的量比为1∶2时,在优化条件下对叔丁基甲苯选择性由50.22%提高到85.38%。The catalytic properties of aluminum chloride ionic liquid for synthesis of p - tert - butyl tolu- ene were investigated using toluene and tert - butylchloride as raw materials. The results showed that the conversion of tert -butylchloride was 100%, and the selectivity to the target product p -tert- butyl tolu- ene was high under the optimized alkylation reaction condition as follows：reaction temperature 0 ℃, ionic liquid amount 1% of toluene mass and molar ratio of toluene to tert - butylchloride 2： 1. Cuprous chloride as the promoter was added into aluminum chloride ionic liquid. When the molar ratio of aluminum trichlo- ride ionic liquid to cuprous chloride was 1 ： 2, the selectivity to p - tert - butyl toluene was enhanced from 50.22% to 85.38% under the ootimal condition.

关 键 词：催化化学 甲苯 氯代叔丁烷 对叔丁基甲苯 离子液体 烷基化 

分 类 号：TQ245.12[化学工程—有机化工] O643.36[理学—物理化学]