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Citation: Zhang Baoan, Sun Yanni, Jin Dai, Lin Qingsong, Lu Lianhai. STUDY OF PROPENE METATHESIS ON MoO₃/SiO₂ CATALYST PROMOTED BY RARE EARTH OXIDES[J]. Chinese Journal of Applied Chemistry, ;1989, 6(4): 18-21. shu

STUDY OF PROPENE METATHESIS ON MoO₃/SiO₂ CATALYST PROMOTED BY RARE EARTH OXIDES

1.
Department of Chemistry, Dalian University of Technology

Received Date: 26 April 1988
Available Online: 14 October 1988

The metathesis of propene has been carried out on the MoO₃/SiO₂ catalyst modified with rare earth oxides. In is found that most of the Ln₂O₃ can prolong the life of the catalysts and shorten the "break-in" period. Among them Tb₄O₇ and Pr₆₁₁ exhibited a more marked effect. The stable duration of catalyst modified by Tb₄O₇ can be prolonged to approximately 1.6 times as long as that of the unmodified one. The "break-in" period was reduced to about 40% to 75%. From the results of the Tb₄O₇. MoO₃/SiO₂ catalyst, it can be concluded that the role of Tb₄O₇ is in facilitating the formation of the active surface site, i.e. the distorted square pyramidal Mo⁵⁺. The reaction of active sitc formation is in first order with respect to the precurser of the active species.
- Rare earth oxides,
- Metathesis,
- MoO₃ catalyst
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沈阳化工大学材料科学与工程学院沈阳 110142

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STUDY OF PROPENE METATHESIS ON MoO3/SiO2 CATALYST PROMOTED BY RARE EARTH OXIDES

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STUDY OF PROPENE METATHESIS ON MoO₃/SiO₂ CATALYST PROMOTED BY RARE EARTH OXIDES