Ethylene polymerization main catalyst and its preparation method, ethylene polymerization catalyst containing the main catalyst
A main catalyst, ethylene polymerization technology, applied in the production of bulk chemicals, etc., to achieve the effect of narrow particle size distribution, large particle size, and high insertion rate
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Embodiment 1
[0039] In the reactor fully replaced by nitrogen, add 4.0g magnesium dichloride, 60ml toluene, 6.0ml ethanol, 3.0ml tributyl phosphate, 2.0ml epichlorohydrin in sequence, increase the temperature to 65℃, continue stirring until the solid is completely dissolved A homogeneous solution is formed. Then lower the temperature to -15°C, add 0.5ml of hydroxyethyl methacrylate, and slowly add 30ml of TiCl in 1 hour 4 After the dripping is completed, the temperature is raised to 85°C and the reaction is stirred for 2h. After the completion of the reaction, the stirring is stopped, the precipitation is allowed to stand, filtered, washed with hexane 4 times, and dried to obtain solid procatalyst particles.
[0040] The main catalyst and the co-catalyst triethylaluminum form a catalyst together. The particle size distribution, activity and characterization results of the polymer resin are shown in Table 1.
Embodiment 2
[0042] Adjust 0.5 ml of hydroxyethyl methacrylate in the preparation of the main catalyst in Example 1 to 0.4 ml of ethyl acrylate, and finally the suspension of the catalyst was stirred and reacted at 85° C. for 0.5 h, and other conditions were the same as in Example 1.
[0043] The particle size distribution and activity of the catalyst and the characterization results of the polymer resin are shown in Table 1.
Embodiment 3
[0045] Adjust 0.5 ml of hydroxyethyl methacrylate in the preparation of the main catalyst in Example 1 to 0.5 ml of ethyl methacrylate, and finally the suspension of the catalyst was stirred and reacted at 85° C. for 15 hours, and other conditions were the same as in Example 1.
[0046] The particle size distribution and activity of the catalyst and the characterization results of the polymer resin are shown in Table 1.
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Abstract
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