Supported metallocene catalyst and preparation method and application thereof
A technology of metallocene catalyst and metallocene compound, which is applied in the field of supported metallocene catalyst and its preparation and application, and can solve the problems of low catalytic activity, low polymerization temperature, easy polymer sticking and energy consumption, etc.
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[0061] The present invention also provides a method for preparing the above-mentioned supported metallocene catalyst, the preparation method comprising: under the protection of an inert gas, ball milling anhydrous magnesium chloride and alkylaluminoxane at a temperature of 15-100°C for 0.1- 100 hours, then under the protection of an inert gas, the carrier is contacted with the first solution for the third time to obtain the carrier after the third contact, and the first solution contains the product obtained by ball milling and the first solvent; The first solvent on the carrier; carrying out the fourth contact between the carrier removed from the first solvent and the second solution to obtain the carrier after the fourth contact, the second solution containing the metallocene compound and the second solvent, wherein, The average particle diameter of the carrier is 20-80 microns, the specific surface area is 550-650 square meters per gram, the pore volume is 0.4-1.2 milliliter...
Embodiment 1
[0099] This example is used to illustrate the supported metallocene catalyst and its preparation method according to the present invention.
[0100] 2.0 grams of triblock copolymer polyethylene oxide-polyoxypropylene-polyoxyethylene (Aldrich Company, P123) and 15 grams of N,N-dimethylformamide (DMF) were added to 11.2 grams of 37% by weight In a solution (pH=4.4) of hydrochloric acid and 64ml of water, stir at 40°C until the polyoxyethylene-polyoxypropylene-polyoxyethylene is completely dissolved, then add 4.45g of tetraethyl orthosilicate to the above solution, 40 After stirring for 1 hour at ℃, add 1 gram of industrial 955 silica gel, stir at 40 ℃ for 0.3 hours, then transfer the solution to a polytetrafluoroethylene-lined reactor, crystallize in an oven at 150 ℃ for 24 hours and then filter , washed with distilled water, and dried to obtain spherical mesoporous silica raw powder.
[0101] The spherical mesoporous silica raw powder obtained in the previous step was calcined...
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