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

摘要： 综述了负载型钨基催化剂用于烯烃歧化领域的研究情况，简要介绍了烯烃歧化催化剂的研究进展以及歧化反应机理，着重介绍了MgO助剂在WO3/SiO2催化的丙烯歧化反应中的作用，如生成活性的气相激发物种、促进1-丁烯异构成2-丁烯、调节酸性以减少副反应以及吸附毒物净化原料等，并对MgO在歧化体系中的作用机理问题进行了部分探讨。此外，还提出了共催化体系的研究趋势，希望能对以后开发高活性的MgO-WO3/SiO2共催化体系提供有益的指导和参考依据。

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