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负载量对催化活性的影响,筛选出18.8%为最佳负载量。通过正交实验优化出PMA/C催化α-蒎烯甲氧基化反应的适宜条件为:催化剂用量为α-蒎烯质量的15%,甲醇与α-蒎烯的摩尔比为2∶1,80℃下反应8h,TME产率可达到32.79%。催化剂重复使用5次后,TME产率可达到18.86%。
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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2010年第11期2823-2828,共6页
CIESC Journal
基金
国家自然科学基金项目(20776053)
广西教育厅松香新产品开发人才小高地项目
广西林产化学品开发与应用重点实验室开放基金项目~~
关键词
磷钼酸
Α-蒎烯
甲氧基化
活性炭
phosphomolybdic acid
α-pinene
methoxylation
activated carbon
