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Citation: SU Yue-Hua, JIANG Xuan-Zhen. Preparation of Diethyl Carbonate over Palladium Catalysts Supported on Mesoporous Molecular Sieve[J]. Chinese Journal of Applied Chemistry, ;2002, 19(10): 994-997. shu

Preparation of Diethyl Carbonate over Palladium Catalysts Supported on Mesoporous Molecular Sieve

SU Yue-Hua ^a,, ,
JIANG Xuan-Zhen ^b

1.
a School of Chemistry and Material Science, Shaanxi Normal University, Xi'an 710062;
2.
b Department of Chemistry, Zhejiang University, Hangzhou

Corresponding author: SU Yue-Hua,
Received Date: 18 January 2002
Available Online: 15 April 2002

The catalytic activities of supported palladium catalysts for the synthesis of diethyl carbonate (DEC) in vapor phase have been studied in a fixed-bed reactor. The catalysts were prepared by impregnating Si-MCM-41(SiM) and Ti-MCM-41(TiM) powder in corresponding solution of PdCl₂, CuCl₂·2H₂O and (C₄H₉O)₄Ti. The results revealed that addition of copper and titanium increased the yields of both DEC and diethyl oxalate(DEO). The catalytic activity of the catalysts supported on SiM was higher than that of the catalysts supported on TiM. Copper and titanium function differently in on the catalyts: with SiM as support, Cu was in favorable of DEO formation, while Ti is of DEC formation. In the case of TiM as support, however, two additives showed opposite results. The above results suggested the support and the additive have synergistic action on the reaction of CO with C₂H₅ONO.
- diethyl carbonate,
- diethyl oxalate,
- carbonylation,
- supported palladium catalyst,
- copper,
- titanium
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