关键词: 烯烃歧化, 氧化镁, 催化剂, 丙烯, 烯烃歧化, 氧化镁, 催化剂, 丙烯

Abstract: This paper reviews the progress of heterogeneous W-based catalysts used for olefin metathesis and introduces the research progress of olefin metathesis catalyst and metathesis reaction mechanism. This review focuses on the role of MgO aid in WO3/SiO2 catalytic propylene metathesis reaction，such as generating active gas-phase “excited species”，promoting double bond isomerization，adjusting acidity to reduce side effects and adsorbing poisons to purify the raw material，etc. In addition，this paper also presents the research trend of heterogeneous MgO-WO3/SiO2 metathesis catalysts to provide guidance and reference for development of highly active MgO-WO3/SiO2 catalytic systems.

Key words: olefin metathesis, magnesia, catalyst, propylene, olefin metathesis, magnesia, catalyst, propylene