Heterogeneous metallocene catalyst

Details Heterogeneous metallocene catalyst Heterogeneous metallocene catalyst

C - Chemistry, Metallurgy

08

F

C08F 4/606 (2006.01) B01J 23/00 (2006.01) B01J 31/22 (2006.01) C08F 4/52 (2006.01) C08F 4/646 (2006.01) C08F 10/00 (2006.01) C08F 4/659 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2237231

A heterogeneous catalyst for olefin polymerization is prepared by spray drying a mixture of a metallocene catalyst, a cocatalyst and a hydrotalcite. Preferred hydrotalcites are magnesium-aluminum hydroxy carbonates. The catalysts are very active for ethylene polymerization. The hydrotalcites used in this invention are generally defined by the formula: (Mg1-x AI x (OH)2)n+ A n- x/n - m H2O wherein X is from 0 to 0.5, m is from 0 to 20 and An- is an anion having a charge of n and are characterized by being dried of adsorbed water. Preferred hydrotalcites are those in which the anion A is a carbonate. 1

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