Catalyst component for olefin polymerization, preparation method of catalyst component, catalyst, method for preparing ultra-high molecular weight polyolefin and application of catalyst component
An olefin polymerization and catalyst technology, applied in the field of olefin polymerization catalysts, can solve the problems of inability to prepare ultra-high molecular weight polyethylene powder and the like
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[0087] According to the second aspect of the present invention, the present invention provides the above-mentioned preparation method for the catalyst component of olefin polymerization, and this preparation method comprises the following steps:
[0088] S1, dissolving magnesium halide in a solvent system containing an organic epoxy compound and an organic phosphorus compound to form a uniform solution;
[0089] S2, reacting the solution obtained in step S1 with an organic acid anhydride compound and an acetate compound, then contacting with a titanium compound, and then raising the temperature to precipitate solid particles containing magnesium / titanium;
[0090] S3, adding electron donor a and electron donor b to the system obtained in step S2, and then treating at a constant temperature to obtain a mixture;
[0091] S4, removing unreacted substances and solvents from the mixture obtained in step S3, and washing to obtain a solid catalyst component.
[0092] Preferably, in ...
Embodiment 1
[0115] (1) Preparation of catalyst components
[0116] Add 4.8 grams of magnesium chloride, 90 mL of toluene, 5.0 mL of epichlorohydrin, and 15.0 mL of tri-n-butyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 450 rpm and a temperature of 60 ° C. Add 1.1 g of o-phthalic acid Diformic anhydride and 0.7 mL of ethyl acetate were kept at constant temperature for 1 hour, then cooled to -40°C, 70 mL of titanium tetrachloride was added dropwise, the temperature was gradually raised to 90°C, and the temperature was kept at constant temperature for 1 hour. 1 mL of 2,2-dimethyl-1,3-diethoxy-propane and 0.2 g of compound A were added, and the temperature was maintained for 1 hour. The mother liquor was filtered off, washed several times with inert diluent toluene and organic solvent hexane, and then dried to obtain a solid catalyst component with good fluidity.
[0117] (2) Polymerization reaction
[0118] A stainless steel reaction kettle with a volu...
Embodiment 2
[0121] (1) Preparation of catalyst components
[0122] Add 4.8 grams of magnesium chloride, 90 mL of toluene, 5.0 mL of epichlorohydrin, and 15.0 mL of tri-n-butyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 450 rpm and a temperature of 60 ° C. Add 1.1 g of o-phthalic acid Diformic anhydride and 0.7 mL of ethyl acetate were kept at constant temperature for 1 hour, then cooled to -40°C, 70 mL of titanium tetrachloride was added dropwise, the temperature was gradually raised to 90°C, and the temperature was kept at constant temperature for 1 hour. 1 mL of 1-ethoxy-3-methoxy-propane and 0.15 g of compound B were added and the temperature was continued for 1 hour. The mother liquor was filtered off, washed several times with inert diluent toluene and organic solvent hexane, and then dried to obtain a solid catalyst component with good fluidity.
[0123] (2) Polymerization reaction: with embodiment 1, polymerization result is shown in Table 1. ...
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