PROCESS FOR PREPARING POLYOLEFINS

摘要

An improved catalyst for the polymerization or copolymerization of olefins,an improved process for preparing such catalyst, and a process for preparing polyolefins is provided involving polymerizing or copolymerizing olefins using such catalyst. A process is provided for preparing a catalyst containing at least one compound selected from the group consisting of a titanium compound and a vanadium compound supported on a solid carrier, and an organometallic compound. The inventive concept resides in using, as the solid carrier, a product obtained by treating at least one member selected from the group consisting of an oxide of Group II - IV metals of the Periodic Table and a double oxide of such oxide and another oxide, which other oxide may be another oxide of Group II - IV metals of the Periodic Table or may be an oxide of other Group metals of the same Table with SO3.