Process for polymerizing ethylene.

摘要

A process for polymerizing or copolymerizing ethylene comprises contacting ethylene or ethylene and at least one of α-olefins with a catalyst consisting esentially of a combination of (A) a solid catalyst component containing at least titanium, magnesium and chlorine, (B) an organoaluminium compound, and (C) an organic compound selected from the group consisting of a compound having P-O-C bond, a compound having B-O-C bond and a compound having C-O-R bond, at a temperature not lower than 125°C and under a pressure not lower than 200 kg/cm<Sup>2</Sup>.