Catalyst component for olefin polymerization and its preparation method and use and catalyst for olefin polymerization and its use
A technology of olefin polymerization and catalyst, which is applied in the field of catalyst components and its application in olefin polymerization reaction, can solve the problems of small particle size carrier difficulties, large particle size carrier poor regularity, etc., and achieve improved repeat stability, good Stereotropic, better results
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[0045] As mentioned above, the present invention provides a method for preparing a catalyst component for olefin polymerization, the method comprising: carrying out a contact reaction with a magnesium halide alcoholate carrier, a titanium compound and an internal electron donor, the internal donor The electron body contains an internal electron donor compound a, an internal electron donor compound b and an internal electron donor compound c, the internal electron donor compound a is a glycol ester compound, and the internal electron donor compound b is a diether compound , the internal electron donor compound c is an alkylene oxide compound; the preparation step of the magnesium halide alcoholate carrier includes: under pressure, the magnesium halide alcoholate melt passes through the structural unit with holes and the liquid Cooling medium contact.
[0046] According to the method of the present invention, preferably, the pressurizing conditions include: the pressure is 0.05-...
Embodiment approach
[0052] According to a preferred embodiment of the present invention, the structural unit with holes is a mesh layer.
[0053] According to the method of the present invention, the adduct solid particles with equivalent particle morphology can be obtained by adopting the metal mesh with multi-layer large-aperture structure and the metal mesh with relatively small number of layers with small-aperture structure. When preparing small particle size (such as less than 30 μm) adduct carrier, it is preferable to use a metal mesh structure with 1-20 layers of small pore structure (such as pore size of 30-50 μm). It is preferred to use a metal mesh structure with 1-20 layers of relatively large aperture (eg, 65-200 μm aperture) structure.
[0054] According to a preferred embodiment of the present invention, the mesh layer includes 1-20 layers, preferably 2-8 layers; the thickness of each layer is 0.01-0.35mm, preferably 0.05-0.25mm, more preferably 0.1-0.15mm mm.
[0055] According t...
preparation Embodiment 1
[0152] In a 1L autoclave, add 500ml of silicone oil, 30g of magnesium chloride, and 50ml of ethanol, raise the temperature to 125°C with stirring, and stir at 125°C for 3 hours. The metal mesh (each layer thickness 0.1mm) is directly placed in 3L hexane pre-cooled to -30°C, the liquid is filtered off, the solid is washed three times with hexane, and dried in vacuum to obtain 50 grams of spherical magnesium chloride alcoholate solid particles S1, the alcohol / magnesium molar ratio is 2.6, and the characterization results are shown in Table 1.
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