The oxidative carbonylation of phenol to diphenyl carbonate catalyzed by Pd Co, Pd Cu and Pd Mn catalyst systems has been studied with the addition of other components such as benzoquinone, Bu 2NBr and molecular sieve...The oxidative carbonylation of phenol to diphenyl carbonate catalyzed by Pd Co, Pd Cu and Pd Mn catalyst systems has been studied with the addition of other components such as benzoquinone, Bu 2NBr and molecular sieve. The results show that Bu 2NBr plays a very important role and Pd Mn catalyst has the highest activity among the three kinds of the catalysts studied. When the reaction is catalyzed by Pd Mn catalyst at n (PdCl 2)∶ n (Mn(OAc) 2)∶ n (Bu 4NBr)∶ n (benzoquinone)=1∶1∶ 10∶ 25, t =100 ℃, P =2 5 MPa( P CO / P O 2 =4∶1), reaction time 8 h, the yield of DPC is 7 23%. The yield of DPC is found to be increased with increase in total pressure of reactor and could be reached to 10 20% at total pressure of 3 5 MPa.展开更多
文摘The oxidative carbonylation of phenol to diphenyl carbonate catalyzed by Pd Co, Pd Cu and Pd Mn catalyst systems has been studied with the addition of other components such as benzoquinone, Bu 2NBr and molecular sieve. The results show that Bu 2NBr plays a very important role and Pd Mn catalyst has the highest activity among the three kinds of the catalysts studied. When the reaction is catalyzed by Pd Mn catalyst at n (PdCl 2)∶ n (Mn(OAc) 2)∶ n (Bu 4NBr)∶ n (benzoquinone)=1∶1∶ 10∶ 25, t =100 ℃, P =2 5 MPa( P CO / P O 2 =4∶1), reaction time 8 h, the yield of DPC is 7 23%. The yield of DPC is found to be increased with increase in total pressure of reactor and could be reached to 10 20% at total pressure of 3 5 MPa.
