A kind of preparation method of olefin polymerization catalyst component and corresponding catalyst
A technology for olefin polymerization and catalysts, which is applied in the field of rapid preparation of olefin polymerization catalyst components, and can solve problems affecting catalyst performance, irregular particle shape, and many polymer fine powders.
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Embodiment 1
[0042] Preparation of olefin polymerization catalyst components: In an atmospheric pressure reactor repeatedly replaced by high-purity nitrogen, 4.8 grams of anhydrous magnesium chloride, 70 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate, 2.0 milliliters of Tetraethoxysilane and 0.2 milliliters of N-methylpyrrolidone were reacted for 35 minutes at a temperature of 60°C, 1.4 grams of phthalic anhydride (co-extrusion aid) and 30 milliliters of toluene were added, and the reaction was continued for one hour. Cool down to -28°C, add 56ml of titanium tetrachloride dropwise (dropping rate: 1ml / min), gradually raise the temperature to 85°C (heating rate: 5°C / min), add 1.1ml of phthalic acid at 80°C Di-n-butyl ester (DNBP, internal electron donor), keep the temperature for one hour, filter, wash the solid twice with toluene, then add 48 ml of titanium tetrachloride and 72 ml of toluene, keep the temperature at 110 ° C for 0.5 hours an...
Embodiment 1B
[0044] The catalyst component is used to catalyze the polymerization of propylene (Example 1B): only change "1 liter of hydrogen under standard state" in Example 1A to "4 liters of hydrogen under standard state", and the rest are the same as in Example 1A.
Embodiment 2
[0046] Preparation of olefin polymerization catalyst components: The experimental conditions were basically the same as those in Example 1, except that the amount of N-methylpyrrolidone was changed to 0.5 ml, and the reaction time at 60° C. was changed to 25 minutes. In the prepared olefin polymerization catalyst component, by weight, the content of titanium is 1.9%, the content of DNBP is 10.2%, the content of diethyl phthalate (DEP) is 0.3%, the content of silicon is 0.08%, and the content of magnesium is 18%. %, chlorine content 57%, phosphorus content 0.11%.
[0047] The catalyst component is used to catalyze the polymerization of propylene (Example 2A): the experimental conditions are basically the same as in Example 1A, except that the catalyst component prepared in Example 2 is used instead, and the specific results are shown in Table 1.
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