改性β分子筛催化合成MTBE  

Synthesis of MTBE with Modified β Molecular Sieve

作　　者：余少兵[1] 周荣琪[1] 李永红[2] 陈洪钫[2] 

机构地区：[1]清华大学化工系,北京100084 [2]天津大学化工系,天津300072

出　　处：《石油化工》2003年第8期666-668,共3页Petrochemical Technology

摘　　要：研究了不同改性条件对β分子筛催化合成甲基叔丁基醚(MTBE)反应活性的影响。实验表明,组合焙烧程序和较小的水蒸气分压有利于提高分子筛的催化活性,但水蒸气分压对分子筛活性的影响较小;酸处理也可增大β分子筛催化合成MTBE反应的异丁烯转化率。结果表明,β分子筛的最佳改性条件:焙烧程序为300℃、1h,550℃、2h;处理溶液pH为2;处理温度350℃、时间3h,所得分子筛的异丁烯转化率可高达95 2%。Effect of different modification conditions on catalytic activity of β molecular sieve for methyl tertiary-butyl ether(MTBE) were investigated.Trea tment with combined calcination program(300 ℃,1 h;550 ℃,2 h) and mild steam partial pressure were good for increasing catalytic activity of β molecular si eve;the effect of steam pressure was relatively low.Acid treatment of catalyst enhanced isobutene conversion of MTBE reaction.Appropriate pH of treating solv ent was 2.Best modification conditions were:combined calcination program(300 ℃,1 h;550 ℃,2 h) and treatment with acid solvent(pH=2) at 350 ℃ for 2 h.M olecular sieve activity(isobutene conversion) was 952%.

关 键 词：Β分子筛 改性 甲基叔丁基醚 甲醇 异丁烯 催化 

分 类 号：TQ223.24[化学工程—有机化工]