A kind of supported metallocene catalyst and preparation method thereof
A metallocene catalyst and metallocene compound technology, applied in the field of supported metallocene catalyst and its preparation, can solve the problem of low catalytic activity and achieve high catalytic activity and stable structure
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Embodiment approach
[0046] According to a preferred embodiment of the present invention, the carrier can be prepared by a method comprising the following steps:
[0047] (1) providing a mesoporous molecular sieve material with a one-dimensional straight-through channel structure or preparing a filter cake of a mesoporous molecular sieve material with a one-dimensional straight-through channel structure as component a1;
[0048] (2) providing a mesoporous molecular sieve material with a hexagonal pore structure or preparing a filter cake of a mesoporous molecular sieve material with a hexagonal pore structure as component a2;
[0049] (3) providing silica gel or preparing a filter cake of silica gel as component b;
[0050] (4) Mix and ball mill the component a1, the component a2, the component b and the montmorillonite, and slurry the solid powder obtained after ball milling with water, and then spray the obtained slurry dry;
[0051]Wherein, the component a1 and the component a2 make the spher...
Embodiment 1
[0094] This example is used to illustrate the supported metallocene catalyst provided by the present invention and its preparation method.
[0095] (1) Preparation of spherical montmorillonite composites
[0096] Add 1.0 g (0.0002 mol) of triblock copolymer polyethylene glycol-polyglycerol-polyethylene glycol (Aldrich, P123) and 1.69 g (0.037 mol) of ethanol to 28 mL of acetic acid with a pH value of 4 and In the buffer solution of sodium acetate, stir at 15°C until P123 is completely dissolved, then add 6g (0.053mol) of trimethylpentane to the above solution, and stir at 15°C for 8 hours, then add 2.13g ( 0.014mol) of tetramethoxysilane was added to the above solution, and then stirred for 20 hours under the condition of 15°C and pH value of 4.5, and the resulting solution was transferred to a polytetrafluoroethylene-lined reactor. Oven crystallization at 60°C for 24 hours, the obtained crystallized product was suction filtered and washed four times with distilled water to o...
experiment Embodiment 1
[0112] This experimental example is used to illustrate the catalytic activity of the supported metallocene catalyst according to the present invention.
[0113]In a 2-liter stainless steel autoclave, replace three times each with nitrogen and ethylene, then add 200 ml of hexane, raise the temperature of the kettle to 80 ° C, then add 800 ml of hexane, and add 2 ml of hexane with the addition of hexane 1 mol / liter of triethylaluminum (TEA, purchased from Zhejiang Furuide Chemical Co., Ltd.) hexane solution, then add 43.3 mg of Cat-1, feed ethylene to raise the pressure to 1.0MPa and maintain it at 1.0MPa , and reacted at 70°C for 1 hour to obtain 57.03 grams of polyethylene particle powder. It was determined through calculation that the efficiency of the catalyst was 1317g PE / gcat.h (that is, 0.3×10 8 g PE / mol Zr h).
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