2002•Ranliao huaxue xuebaoRequires access
STUDY ON DIRECT SYNTHESIS OF DIPHENYL CARBONATE WITH HETEROGENEOUS CATALYTIC REACTION II.EFFECT OF CALCINATION TEMPERATURE ON CATALYTIC ACTIVITY OF CATALYST
Guang Zhang
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Abstract
The La xPb yMn zO supported Pd catalysts for direct synthesis of diphenyl carbonate were prepared at calcining temperature 600?℃,700?℃,800?℃and 900?℃ respectively The characterization of catalysts and support properties were investigated by XRD, SEM and TEM,the results showed that the support had the same main phaseLa 0 3 Mn 0 5 PbO, but the catalysts prepared by the support calcined at 800?℃ had good distribution of particle diameter and pore volume Finally, the synthesis of DPC were carried out and it was found that the catalyst prepared by the support calcined at 800?℃ was better than the others and the selectivity could reach 95 7%