三元柱交联蒙脱土的合成及其催化性能的研究  

Synthesis and catalytic activity of three-metal complex cross-linked montmorillonite

作　　者：周华锋[1] 王雅静[1] 何美[1] 聂英龙[1] 

机构地区：[1]沈阳化工学院应用化学系,辽宁沈阳110000

出　　处：《工业催化》2005年第3期44-47,共4页Industrial Catalysis

摘　　要：采用共混法制备了一系列三元柱交联蒙脱土,并以偏三甲苯和甲醇的烷基化及均四甲苯的异构化作为探针反应考察其催化活性,找出金属离子的种类和预处理温度对偏三甲苯、偏四甲苯转化率及均四甲苯收率的影响。结果发现,少量二价离子的引入能提高三元柱交联蒙脱土的活性,但大量二价离子的引入反而会降低其活性。催化剂最适宜的预处理温度为500～550℃,同时以偏三甲苯甲醇烷基化反应对催化剂的失活进行了考察。结果表明,催化剂经20多个脉冲后仍能保持较好的活性。A series of cross-linked montmorillonite(CLM)were synthesized by copolymerization method. Alkylation of 1,2,4-trimethylbenzene with methanol and isomerization of 1,2,3,5-tetramethylbenzene were used as the probe reaction to investigate activity of the CLM. The influence of metal ions and calcination temperature on activity of the CLM was investigated. The results showed that introduction of small amount of M^(2+)(such as Ni^(2+),Co^(2+)) enhanced activity of the CLM, but excessive amount M^(2+) would lower the activity. The optimum calcination temperature is 500-550　℃. The CLM catalyst sustained good activity after 20 times of pulses.

关 键 词：三元柱交联蒙脱土 烷基化 异构化 催化剂失活 

分 类 号：TQ426.6[化学工程] TQ426.96