MAGNESIUM CONTAINING SUPPORT, CATALYST AND PROCESS FOR POLYMERIZING OLEFINS

摘要

A catalyst for the polymerization of olefins is prepared by the reaction of a aliphatic alcohol such as n-propyl alcohol with a mixture of an alkyl magnesium compound such as n-butyl, sec-butyl magnesium and a silicon tetrahalide such as SiCl4. After washing the precipitate several times with a hydrocarbon such as hexane, it is suspended in a hydrocarbon such as hexane and an organic titanium compound such as TiCl4 is added after which a suitable reducing agent such as diethyl aluminum chloride is added at a temperature below 70.degree.C. The thus formed solid catalyst is washed several times with a hydrocarbon solvent such as hexane and is then utilized for the polymerization of olefins.