Abstract:

Supported phosphomolybdic acid catalysts on activated carbon (PMA/C) were prepared by solution impregnation and characterized by FTIR, XRD, BET and TG, and their catalytic performance evaluated for the methoxylation of α-pinene. The results show that PMA disperses on the surface of activated carbon well and is still of Keggin structure. The catalytic activity comes from acidity of supported PMA. The reaction conditions such as reaction time, temperature, PMA loading and mixing ratio of methanol to α-pinene were optimized by orthogonal experiment. The optimum values are:PMA loading 18.8%, PMA/C catalyst 15% (based on the mass of α-pinene), molar ratio of methanol to α-pinene 2∶1, temperature 80℃ and reaction time 8 h. The yield of α-terpinyl methyl ether (TME) is 32.79% under the optimum conditions. TME yield has still 18.86% after catalyst used for 5 times.

摘要：

采用简单浸渍法制备了一系列不同负载量的活性炭负载磷钼酸（PMA/C）催化剂，运用FTIR、XRD、BET及TG进行了PMA/C催化剂的表征。研究了PMA/C催化α-蒎烯的甲氧基化反应，反应主要得到加成产物α-松油基甲醚（TME）和α-蒎烯异构产物。以TME产率为指标，考察了PMA