Several supported zirconocene catalysts were prepared by using MgCl2. 6H(2)
O as a precursor for producing an active support. Such catalysts combined w
ith methylaluminoxane (MAO) obtained by reacting MgCl2. 6H(2)O with AlMe3 s
how good activity for ethylene polymerization similar to that of anhydrous
MgCl2 supported zirconocene catalyst.