A kind of preparation method of catalyst component for olefin polymerization
A technology for olefin polymerization and catalysts, which is applied in the field of preparation of catalyst components, and can solve problems such as poor shape of catalyst particles, unfavorable long-term stable operation of polymerization equipment, and wide distribution
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Embodiment 1
[0034] Preparation of the catalyst component: Weigh 2.4 grams of anhydrous magnesium chloride, add 8.8 milliliters of tetrabutyl titanate, 2.0 milliliters of epichlorohydrin, 2.2 milliliters of absolute ethanol and 50 milliliters of toluene, keep stirring and dissolving at 60°C until a transparent solution is formed . Then add 100 milliliters of toluene, lower the temperature of the solution to -20°C, slowly add 30 milliliters of titanium tetrachloride dropwise with a burette, after the addition is completed, keep the reaction at -20°C for half an hour, then raise the temperature to 50°C to maintain the reaction for 4 hours, and finally the temperature was raised to 90° C. to maintain the reaction for 3 hours to obtain a catalyst suspension. The catalyst suspension was left to stand, settled, washed four times with toluene, each time the consumption of toluene was 50 milliliters, and then washed twice with hexane, each time the consumption of hexane was 50 milliliters. °C, pu...
Embodiment 2
[0037] Preparation of the catalyst component: in the preparation steps of Example 1, adjust "reduce the solution temperature to -20°C" to "reduce the solution temperature to 0°C" and accordingly change "maintain -20°C for half an hour" to " Maintain 0°C for half an hour", and adjust "add 30 milliliters of titanium tetrachloride dropwise" to "add 15 milliliters of titanium tetrachloride dropwise", and other conditions are the same as in Example 1. The average particle diameter of the obtained catalyst component was 8.65 µm. Elemental analysis (ICP): Ti: 6.75% by weight, Mg: 19.71% by weight.
[0038] Catalyst evaluation: The evaluation conditions of the catalyst slurry polymerization are the same as in Example 1, and the polymerization results are shown in Table 1.
Embodiment 3
[0040] Preparation of the catalyst component: "2.2 milliliters of absolute ethanol" in the preparation step of Example 1 was adjusted to "11.8 milliliters of isooctyl alcohol", and other conditions were the same as in Example 1. The average particle diameter of the obtained catalyst component was 3.92 µm. Elemental analysis (ICP): Ti: 27.61% by weight, Mg: 10.10% by weight.
[0041] Catalyst evaluation: The evaluation conditions of the catalyst slurry polymerization are the same as in Example 1, and the polymerization results are shown in Table 1.
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