Supported metallocene catalyst and its preparation method
A metallocene catalyst and metallocene compound technology, applied in the field of supported metallocene catalyst and its preparation, can solve the problems of low mechanical strength, high cost and low catalytic activity of mesoporous materials, and achieve stable structure, high catalytic activity, High catalytic activity
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preparation example 1
[0078] This preparation example is used to illustrate the supported metallocene catalyst and its preparation method according to the present invention.
[0079] 1.5 gram of cetyltrimethylammonium bromide (CTAB) and 1.5ml density are 1.07g / ml, the polyethylene glycol octyl phenyl ether (triton X-100) of concentration weight 5% joins in In the hydrochloric acid solution that is the concentrated hydrochloric acid of 37% by weight and 75 grams of water by 29.6 gram concentration, stir until CTAB and Triton X-100 dissolve completely at 40 ℃; Add 4.6 grams of industrial sodium silicate to the above solution Stirring at 40°C for 15 minutes, the sodium silicate was completely dissolved, and then crystallized at 40°C for 24 hours, and the original powder mesoporous material was obtained after filtration, washing and drying; the original powder mesoporous material was heated in a muffle furnace at 600°C After calcination for 24 hours, the template agent was removed to obtain a spherical...
experiment Embodiment 1
[0093] This experimental example is used to illustrate the catalytic activity of the supported metallocene catalyst according to the present invention.
[0094] 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 The concentration is 1 mol / liter triethylaluminum (TEA) hexane solution, then add 62.3 milligrams of supported metallocene catalysts JKQ-YIN that above-mentioned embodiment 1 makes, feed ethylene and pressure is raised to 1.0MPa and maintain 1.0 MPa, react at 70°C for 1 hour. Obtain 100 grams of polyethylene particle powder, the bulk density (BD) of this polyethylene particle powder is 0.300g / ml, melt index MI 2.16 = 0.005 g / 10 min. It is determined by calculation that the efficiency of the catalyst is 1605g PE / (gcat h) (ie, 4.2×10 7 gPE / (mol Zr h)).
experiment Embodiment 2
[0096] This experimental example is used to illustrate the catalytic activity of the supported metallocene catalyst according to the present invention.
[0097] 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 70 ° C, then add 800 ml of hexane, and add 2 ml of hexane with the addition of hexane The concentration of 1 mol / liter of triethylaluminum (TEA) hexane solution and 10 milliliters of hexene, then add the supported metallocene catalyst JKQ-YIN that 64.4 milligrams above-mentioned embodiment 1 makes, feed ethylene to reduce the pressure Raise to 1.0MPa and maintain at 1.0MPa, react at 70°C for 1 hour. Obtain 47 grams of polymkeric substance, the bulk density (BD) of this polymkeric substance is 0.290g / ml, melt index MI 2.16 = 0.200 g / 10 min. It was determined by calculation that the efficiency of the catalyst was 730g PE / (gcat h) (ie, 1.9×10 7 g PE / (molZr h)).
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