TITANIUM CATALYST COMPONENT FOR ETHYLENE POLYMERIZATION, ETHYLENE POLYMERIZATION CATALYST, AND PROCESS FOR ETHYLENE POLYMERIZATION USINGTHE SAME

摘要

Disclosed is a titanium catalyst component for ethylene polymerization obtained by contacting ¢A! a solid magnesium aluminum complex containing magnesium, halogen, aluminum and an alkoxy group and/or alcohol having at least 6 carbon atoms, with ¢B! a tetravalent titanium compound. The solid magnesium aluminum complex ¢A! is obtained by contacting (a-1) a magnesium solution formed from a halogen-containing magnesium compound, an alcohol having at least 6 carbon atoms and a hydrocarbon solvent, with (a-2) an organoaluminum compound. Also disclosed is a process for ethylene polymerization comprising polymerizing ethylene or copolymerizing ethylene with an .alpha.-olefin having 3 to 20 carbon atoms in the presence of a catalyst for ethylene polymerization comprising ¢I! the above-mentioned titanium catalyst component for ethylene polymerization and ¢II! an organoaluminum compound catalyst component.