Catalyst component for olefin polymerization and preparation and application of catalyst component
An olefin polymerization and catalyst technology, applied in the field of catalyst components and their preparation, can solve the problems of difficult control of catalyst particle shape, difficult to obtain, high material price, etc.
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Embodiment 1
[0041] Preparation of catalyst components: take 30mL of hexane, 3.15mL of hexane solution of di-n-butylmagnesium (1M) and 1.0mL of isooctyl alcohol successively, raise the temperature to 50°C and keep stirring for half an hour to obtain a transparent solution, then add 2mL of hexane solution (10g / L) of polystyrene polydimethylsiloxane diblock copolymer A (polydimethylsiloxane content: 67wt%), cooled to -50°C, and added 1.6mL The hexane solution (2M) of dichloroethylaluminum and 0.35mL titanium tetrachloride were kept at low temperature for half an hour, then the temperature was raised slowly naturally, and after rising to room temperature, the reaction was maintained at 50°C for 2 hours. The temperature of the catalyst suspension was lowered to room temperature, allowed to stand, settled, washed three times with hexane, the amount of hexane each time was 50mL, after the washing was completed, it was dried to obtain a brown solid flowable powder, that is, the catalyst component,...
Embodiment 2
[0044] The preparation method of catalyst component is the same as embodiment 1, and the difference is that "polystyrene polydimethylsiloxane diblock copolymer A (polydimethylsiloxane content 67wt%) hexane solution (10g / L) 2mL" was changed to "polystyrene polydimethylsiloxane diblock copolymer A (polydimethylsiloxane content is 67wt%) hexane Solution (10g / L) 4mL". Its average particle diameter was measured to be 12.66 μm. Elemental analysis (ICP): Ti: 5.83wt%, Mg: 17.15wt%.
[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 catalyst component is the same as embodiment 1, and the difference is that "polystyrene polydimethylsiloxane diblock copolymer A (polydimethylsiloxane content 67wt%)" was changed to "polystyrene polydimethylsiloxane diblock copolymer B (polydimethylsiloxane content is 14wt%)". Its average particle diameter was measured to be 13.52 μm. Elemental analysis (ICP): Ti: 5.72wt%, Mg: 16.13wt%.
[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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