| 摘要 |
<p>The present invention relates to preparation and application of an olefin polymerization catalyst. A main catalyst is composed of a carrier, transition metal halide, and an organic alcohol compound. The transition metal halide is obtained by in-situ reaction between titanate and silicon halide. The molar ratio of the carrier to the transition metal halide to the organic alcohol compound is 1 to 0.01-20 to 0.1-6. The molar ratio of the titanate to the silicon halide is 1 to 0.5-2. A promoter is an organo-aluminum compound. The molar ratio of the transition metal halide in the main catalyst to the promoter is 1 to 30-500. Particles of the catalyst are good in morphology and are in a spherical shape. The catalyst has high activity and polymer molecular weight; is applicable to a slurry method, a vapor phase polymerization process, or a combined polymerization process; and has a simple preparation method, has low requirements on devices, and produces small pollution to the environment.</p> |
