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非均相羰基氧化一步合成碳酸二苯酯的研究(Ⅴ)筛选催化剂及优化合成条件

张光旭a,b; 吴元欣b; 马沛生a; 田崎峰b; 吴广文b; 李定或b; 王存文b   

  1. a State Key Laboratory of C1 Chemistry and Technology, Tianjin University, Tianjin,300072,
    China
    b Department of Chemical Engineering, Wuhan Institute of Chemical Technology, Wuhan,430074,
    China 
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-10-28 发布日期:2003-10-28
  • 通讯作者: 张光旭

Study on Direct Synthesis of Diphenyl Carbonate with Heterogeneous Catalytic Reaction (Ⅴ)
Screening Catalysts and Optimizing Synthesis Conditions

ZHANG Guangxua,b; WU Yuanxinb; MA Peishenga; TIAN Qifengb; WU Guangwenb; Li Dinghuob; WANG Cunwenb   

  1. a State Key Laboratory of C1 Chemistry and Technology, Tianjin University, Tianjin,300072,
    China
    b Department of Chemical Engineering, Wuhan Institute of Chemical Technology, Wuhan,430074,
    China 
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-10-28 Published:2003-10-28
  • Contact: ZHANG Guangxu

摘要: Pd/LaxPbyMnOz, Pd/C, Pd/molecular sieve and Pd-heteropoly acid catalysts for direct
synthesis of diphenyl carbonate (DPC) by heterogeneous catalytic reaction were compared and
the results of DPC synthesis indicated that the catalyst Pd/LaxPbyMnOz had higher activity.
The Pd/LaxPbyMnOz catalyst and the support was characterized by XRD, SEM and TEM, the main
phase was La0.62Pb0.38MnO3 and the average diameter could be about 25.4nm. The optimum
conditions for synthesis of DPC with Pd/LaxPbyMnOz were determined by orthogonal
experiments and the experimental results showed that reaction temperature was the first
factor of effect on the selectivity and yield of DPC, and the concentration of O2 in gas
phase also had significant effect on selectivity of DPC. The optimum reaction conditions
were catalyst/phenol mass ratio 1 to 50, pressure 4.5 MPa,volume concentration of O2 25%,
reaction temperature 60℃ and reaction time 4 h. The maximum yield and average selectivity
could reach 13% and 97% respectively in the batch operation.

关键词: diphenyl carbonate;supported catalyst;heterogeneous catalytic reaction;optimum conditions

Abstract: Pd/LaxPbyMnOz, Pd/C, Pd/molecular sieve and Pd-heteropoly acid catalysts for direct
synthesis of diphenyl carbonate (DPC) by heterogeneous catalytic reaction were compared and
the results of DPC synthesis indicated that the catalyst Pd/LaxPbyMnOz had higher activity.
The Pd/LaxPbyMnOz catalyst and the support was characterized by XRD, SEM and TEM, the main
phase was La0.62Pb0.38MnO3 and the average diameter could be about 25.4nm. The optimum
conditions for synthesis of DPC with Pd/LaxPbyMnOz were determined by orthogonal
experiments and the experimental results showed that reaction temperature was the first
factor of effect on the selectivity and yield of DPC, and the concentration of O2 in gas
phase also had significant effect on selectivity of DPC. The optimum reaction conditions
were catalyst/phenol mass ratio 1 to 50, pressure 4.5 MPa,volume concentration of O2 25%,
reaction temperature 60℃ and reaction time 4 h. The maximum yield and average selectivity
could reach 13% and 97% respectively in the batch operation.

Key words: diphenyl carbonate, supported catalyst, heterogeneous catalytic reaction, optimum conditions