Catalyst component for olefin polymerization, preparation method, catalyst and application thereof
A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalysts, can solve problems such as crushing, increase in fine powder content, and unsatisfactory problems, and achieve the effects of low fine powder content, good hydrogen adjustment performance, and high bulk density
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Embodiment 1
[0089] (1) Preparation of catalyst components
[0090] To a four-port flask equipped with a temperature controller, a stirrer, a reflow condenser, a 450 ml of nitrogen, and a 120 ml of tetrahydrofuran (THF), 4.2 g of magnesium chloride and 1.0 ml of TiCl were added under stirring. 4 , The temperature was warmed to 68 ° C with stirring, and the constant temperature reflux was 4 hours at this temperature to obtain a mother liquor;
[0091] To a temperature controller, a stirrer, a reflow condenser, a four-mouth flask blown and protected by nitrogen, and the Cabot Corporation TS-610, a particle size of less than 1 μm) and 1.0 g eight Methyl polyfangular polycarcane, silica gel and octamethylene polyfriendin polymethylenesiloxane weight ratio 5.5, adding the mother liquor, continued constant temperature and reflux for 2 hours at 68 ° C, complete silicone Dispersed in the mother liquor to give a slurry suspension;
[0092] In closed circuit circulating airflow spray dryer (such as MIN...
Embodiment 2
[0096] As compared with Example 1, only in the preparation of the catalyst component of step (1) "Add 5.5 g of silica gel (CabotcorPoration TS-610, particle size less than 1 μm) and 1.0 g of octamethylene polymerizing polylinediloxane, The weight ratio of silica gel and multi-neutral polysiloxane is "changed to" to add 6.4 g of silica gel (Cabot Corporation TS-610, particle size less than 1 μm) and 0.1 g of octamethylene polyfriendin polymethylenesiloxane, silicone The weight ratio 64 of the multipolar neutralized semi-silicone oxide is the same as those in Example 1. Among them, the Poss content in the calculation catalyst is 0.55% by weight, and the content analysis of other components is shown in Table 1, the margin is the carrier.
Embodiment 3
[0098] As compared with Example 1, only in the preparation of the catalyst component of step (1) "Add 5.5 g of silica gel (CabotcorPoration TS-610, particle size less than 1 μm) and 1.0 g of octamethylene polymerizing polylinediloxane, The weight ratio of silica gel and multi-neutral polysiloxane is 5.5 "Change to" to add 6.0 g of silica gel (Cabot Corporation TS-610, particle size of less than 1 μm) and 0.5 g of octamide polymerizing polycarbilisiloxane, silicone The weight ratio 12 of the multipolar hemoxyside is the same as those in Example 1. Wherein the catalyst has been calculated POSS content of 2.73wt%, the content of the other components of the analysis are shown in Table 1, the balance being a carrier.
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