| 摘要 |
A supported Ziegler catalyst prepared by the following steps, carried out under anhydrous conditions: (A) reacting a hydroxyl groups-containing support material comprising magnesium silicate or silica and magnesia with one or more organo-metallic compounds having the general formula MR1aQb-a wherein M is a metal which is aluminium, boron, lithium, zinc or magnesium, R1 is a hydrocarbyl group, Q is halogen or an oxyhydrocarbyl group, b is the valency of M and a is an integer from 1 to b, (B) removing unreacted organometallic compound, if any, from the produced solid material, (C) impregnating the solid material obtained from step B with one or more halogen-containing transition metal compounds wherein the transition metal(s) comprise titanium, vanadium or zirconium.
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