A kind of alkoxymagnesium carrier particle and its application
A technology of magnesium alkoxide carriers and particles, which is applied to magnesium alkoxide carrier particles and their application fields, can solve the problems of reduced catalyst activity and insignificant modification effect, and achieves improved polymerization activity, good particle shape and high bulk density. Effect
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[0050] The preparation method of the alkoxymagnesium carrier particles in the examples can be carried out with reference to the prior art, and the order of adding the reaction components can be determined according to the needs, and there is no definite order. Wherein, the halogenating agent and the halide of the transition metal element in the fourth period of the periodic table can be directly added in solid form, or can be dissolved in ethanol first and added in solution form. The methacrylate compounds containing hydroxyl groups can be directly added to the reaction system in liquid form.
[0051] The preparation reactions of the alkoxymagnesium carrier particles are all carried out under an inert gas atmosphere, such as argon and nitrogen atmospheres, and nitrogen is preferably used in the present invention.
[0052] In the preparation process, the magnesium powder and the alcohol compound can be put into the reaction at one time at the beginning of the reaction, or can b...
Embodiment 1～5
[0087] Embodiments 1 to 5 are the preparation of alkoxymagnesium particles. The specific steps are to fully replace the 250ml reactor with a stirrer, reflux condenser, thermometer and dropping funnel with nitrogen, then add 20ml of ethanol, 0.6g of iodine Stir and dissolve with 0.25g magnesium chloride. Add 0.8g of magnesium powder subsequently, heat up to reflux temperature. Add a certain amount of halides of transition metal elements in the fourth cycle dissolved in ethanol to the reaction system for 0.5 hr, keep at reflux temperature, add 20 ml of ethanol and 0.8 g of magnesium every 0.5 hr, and add 3 times in total. Keep the reaction for 2 hours after the addition, add a certain amount of methacrylate compound containing hydroxyl, keep the reaction until no hydrogen gas is released after the addition, continue to stir and react for 6 hours. Finally, the alkoxymagnesium carrier obtained by the reaction was washed three times with clean hexane, and dried under flowing nitro...
Embodiment 6～10
[0102] Examples 6-10 use the alkoxymagnesium carrier particles prepared in Examples 1-5 as carriers to further prepare Ziegler-Natta solid catalyst components, and use them in propylene polymerization to evaluate their catalytic effect.
[0103]The preparation process of the Ziegler-Natta solid catalyst component is: after fully replacing the 250ml reactor with agitator, reflux condenser, thermometer and dropping funnel with nitrogen, add the aforementioned 5g alkoxy magnesium Carrier particles, 70mL toluene, cool down to -20°C, add 10ml titanium tetrachloride; then raise the temperature to 70°C, then add a certain amount of electron donor compound, finally raise the temperature to 110°C, keep the temperature for 2 hours, and extract the supernatant Then add 10mL of titanium tetrachloride and 70mL of toluene to raise the temperature to 110°C and keep the temperature constant for 2 hours. Finally, the solid was washed 3 times with hot toluene at 90° C. and 4 times with hexane a...
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