Catalyst for olefin polymerization, preparation method and application thereof, and method for olefin polymerization
An olefin polymerization and catalyst technology, applied in the polymer field, can solve the problems of affecting the appearance and catalytic activity of catalysts for olefin polymerization, poor carrier molding effect, unstable preparation process, etc., and achieves increased bulk density, good morphology, and reduced The effect of production costs
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preparation example Construction
[0025] On the one hand, the invention provides a kind of preparation method of catalyst for olefin polymerization, the method comprises:
[0026] 1) Prepare the carrier: the magnesium halide shown by the general formula MgXY and the general formula R 1 The alcohol compound represented by OH is mixed with the oxirane compound represented by the general formula (I) and an optional inert liquid medium at no higher than 35°C to obtain a fluid mixed substance; then the fluid The state mixed substance is solidified by spraying;
[0027]
[0028] 2) Preparing the catalyst: carrying out a contact reaction with the carrier obtained in step 1) with the titanium source and the internal electron donor compound;
[0029] Wherein, in the general formula MgXY, X is a halogen element, and Y is selected from halogen elements, C 1 -C 14 Alkyl, C 1 -C 14 Alkoxyl, C 6 -C 14 Aryl or C 6 -C 14 A group consisting of aryloxy groups;
[0030] In general formula R 1 OH, R 1 for C 1 -C ...
preparation example 1
[0088] This preparation example is used to prepare the catalyst carrier for olefin polymerization described in the present invention.
[0089] In a 1.6L reactor, add 0.08mol magnesium chloride and 1.6mol ethanol, raise the temperature to 90°C under stirring, and after constant temperature reaction for 1 hour, cool down to 20°C, then add 0.3mol epichlorohydrin to obtain a fluid mixture. Spray the fluid mixed substance into 120°C white oil using a sprayer with a nozzle head and a material conduit. Wherein, the temperature of the fluid mixture in the material conduit is 20°C, and the temperature in the nozzle head is 150°C. The carrier precursor obtained from the white oil was washed 4 times with hexane, and dried in vacuum for 1 hour to obtain the catalyst carrier Z1 for olefin polymerization.
[0090] The average particle diameter (D50) of the catalyst carrier Z1 for olefin polymerization is 32 microns, and the particle size distribution ((D90-D10) / D50) is 0.8. The particle m...
preparation example 2
[0096] This preparation example is used to prepare the catalyst carrier for olefin polymerization described in the present invention.
[0097] In a 1.6L reactor, add 0.08mol magnesium chloride and 1.4mol ethanol, raise the temperature to 120°C under stirring, and after constant temperature reaction for 1.2h, cool down to 30°C, then add 0.35mol epichlorohydrin to obtain a fluid mixture , using high-speed stirring (1800rpm) to emulsify the fluid mixture, and using a sprayer containing a nozzle head and a material conduit to spray the emulsified fluid mixture into white oil at 125°C, and the flow The temperature of the state mixed substance in the material conduit is 30°C, and the temperature in the nozzle head is 130°C. The carrier precursor obtained from the white oil was washed 4 times with hexane, and vacuum-dried for 1 hour to obtain the catalyst carrier Z2 for olefin polymerization.
[0098] The average particle diameter (D50) of the catalyst carrier Z2 for olefin polymeri...
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