A novel non-metallocene supported catalyst

CpTi(dbm)Cl2/MgCl2 was synthesized in situ via reaction between CpTi(dbm)Cl2 and BuMgCl in heptane．The surface area

pore volume and crystal stmcture of the supported catalyst and MgCl2(in situ) which was obtmned by reaction of Mg and BuCl were characterized by BET and XRD methods

respectively．The surface area and pore volume of MgOl2(in situ) are higher than those of normal MsCl2

and the surface area and pore volume of the supporled catalyst are also high

The crystal structure of the supported catalyst is amorphous

which is similar to that of MgCl2(in situ)．Ethylene polymerization with MAO or AIR3 was investigated

which indicates that the activity does not decrease while AIR3 was used aS co-catalyst instead of MAO

so MAO can be absent in both the catalyst preparation and ethylene polymerization processes．The catalytic activity eaR be as high as 3.06×106gPE/molTi·h with tfiisobutyl aluminium(Ti-BA) as co-catalyst when polymerization temperature is 80℃．and Al/Ti molar ratio is 200．