Catalyst components for olefin polymerization and their preparation and application
A technology of olefin polymerization and catalyst, which is applied in the field of catalyst components and its preparation, can solve the problems of complex forming steps, difficult control of forming steps, difficult control, etc., and achieve narrow particle size distribution, high catalytic activity, and high sensitivity to hydrogen adjustment Effect
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Embodiment 1
[0041] Preparation of catalyst components: take 30mL of toluene, 3.15mL of hexane solution of dibutylmagnesium (1M) and 1.0mL of isooctyl alcohol in sequence, raise the temperature to 50°C and keep stirring for half an hour to obtain a transparent solution, then add polyphenylene Toluene solution (15g / L) of ethylene diblock polyethylene oxide copolymer A (polystyrene content is 42wt%) 2mL, cool down to -10 ℃, add 0.36mL of silicon tetrachloride toluene solution (1M) and 0.35mL of titanium tetrachloride, after maintaining the low temperature for half an hour, the temperature was naturally raised slowly, and after rising to room temperature, the reaction was maintained at 50°C for 2 hours. The temperature of the catalyst suspension is down to room temperature, left standing, settling, washed three times with toluene, each time the consumption of toluene is 50mL, after the washing is completed, the brown solid flowable powder is dried, which is the catalyst component, and its aver...
Embodiment 2
[0044] The preparation method of the catalyst component is the same as in Example 1, except that 2 mL of toluene solution (15 g / L) of polystyrene diblock polyethylene oxide copolymer A (polystyrene content is 42 wt %) is changed to poly 4 mL of toluene solution (15 g / L) of styrene diblock polyethylene oxide copolymer A (polystyrene content: 42 wt%). The average particle diameter thereof was measured to be 15.1 μm. Elemental analysis (ICP): Ti: 4.31 wt%, Mg: 22.78 wt%.
[0045] The ethylene slurry polymerization evaluation method of the catalyst is the same as in Example 1, and the polymerization results are shown in Table 1.
Embodiment 3
[0047] The preparation method of the catalyst component is the same as that in Example 1, except that the temperature is slowly raised to room temperature naturally, and then heated to 50° C. instead of rapidly raised to 50° C. within 10 minutes. The average particle diameter thereof was measured to be 18.4 μm. Elemental analysis (ICP): Ti: 4.57wt%, Mg: 21.81wt%.
[0048] The ethylene slurry polymerization evaluation method of the catalyst is the same as in Example 1, and the polymerization results are shown in Table 1.
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