【摘要】 用新型双金属催化剂Rh-Ni@MOF-5对不同碳链长度的烯烃氢甲酰化反应进行研究。用直接法合成的MOF-5晶体作催化剂载体,将Rh、Ni元素负载在MOF-5上合成Rh-Ni@MOF-5。采用TG、XRD、SEM、TEM和FTIR等手段对其进行表征,结果表明,负载金属后的催化剂拥有规整的立方体结构且热稳定性较强。采用3种烯烃的氢甲酰化反应对其催化性能进行评价,结果表明,Rh-Ni@MOF-5对烯烃的氢甲酰化反应具有良好的催化作用并且解决了反应后催化剂的分离回收问题。在一定条件下,其反应转化率均高于70%。与单金属催化剂Rh@MOF-5进行对比发现,双金属催化剂具有更高的催化活性,其收率和选择性均较单金属催化剂有明显优势。以1-己烯氢甲酰化反应为例,考查了Rh-Ni@MOF-5的使用寿命,结果表明,多次重复利用后仍能保持稳定的晶体结构和良好的催化性能。更多还原

【Abstract】 Study on using new type bimetallic catalyst Rh-Ni @ MOF-5 in the hydroformylation of olefins with different chain length has been carried out. MOF-5 crystal synthesized by the direction method is used as carrier,and then Rh-Ni@ MOF-5 has been prepared by loading Rh and Ni elements on MOF-5 and characterized by TG,XRD,SEM,TEM and FTIR measurements. The results indicate that this bimetallic-loading catalyst owns a regular cubic structure and great thermal stability. The catalytic properties of this bimetallic catalyst have been evaluated in the hydroformylation reaction of three kinds of olefins,and the results show that Rh-Ni @ MOF-5 has excellent catalytic performance on the hydroformylation reaction of olefins and the separation and recovery problem of catalyst after reaction has been solved.Based on the certain conditions,the reaction conversion is always higher than 70%. It is found that Rh-Ni @ MOF-5exhibits a better catalytic activity,higher yield and higher selectivity than monometallic Rh @ MOF-5. Taking the hydroformylation reaction of 1-hexene for example,the service life of Rh-Ni@ MOF-5 has been examined,showing that it can maintain stable crystal structure and good catalytic performance after repeated uses.更多还原