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Supported metallocene catalyst carrier and metallocene catalyst

A metallocene catalyst and a supported technology are applied in the field of supported metallocene catalysts and carriers for supported metallocene catalysts, and can solve the problems of uneven particle size distribution of the carrier, many fine powders, complicated processes, etc., and achieve a simple preparation method, The effect of improving catalytic activity and broad application prospects

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

to SiO 2 There are many studies on the carrier, and some MgCl-containing 2 SiO 2 As a carrier report (Chinese patent application 200610137777.8 and 200710176589.0), this method of grinding or chemical loading has its limitations. The particle size distribution of the carrier prepared by the chemical grinding method is not uniform, and there are many fine powders. The chemical loading method is used. Relatively complex, need to operate under anhydrous and anaerobic conditions

Method used

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  • Supported metallocene catalyst carrier and metallocene catalyst
  • Supported metallocene catalyst carrier and metallocene catalyst
  • Supported metallocene catalyst carrier and metallocene catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of silica gel support

[0039] Add 50 grams of commercially available 955 silica gel to a 500ml glass bottle replaced with nitrogen, add 200ml of distilled water, add 100ml containing 0.76gNaAlO 2 Add 3% dilute sulfuric acid solution dropwise, adjust the polarity of the solution to neutral, raise the temperature of the system to 70°C, react for 10 hours under stirring, filter, wash with distilled water, and then dry in an oven to obtain a white solid. The Al content is 0.5%. The white solid was calcined under nitrogen at a temperature of 600° C. for 4 hours to obtain the carrier. See Table 1 for the data.

[0040] Co-catalyst loading

[0041] Add 20 grams of the above-mentioned carrier to a 250ml glass bottle replaced with nitrogen, add 30ml of toluene, raise the temperature of the system to 50°C, add the toluene solution of MAO (11g MAO) dropwise, react for 4 hours, filter, and wash 3 times with 30ml of toluene, Then, it was washed twice with hexane and...

Embodiment 2~4

[0045] With embodiment 1, difference is that NaAlO 2 The dosages are 1.52g, 3g and 6g respectively. data see

[0046] Table 1

[0047] slurry polymerization

[0048] In a 2-liter stainless steel autoclave, after blowing with nitrogen and replacing ethylene several times, add 1 liter of hexane, 10 ml of comonomer 1-hexene, 2 mmoles of triethylaluminum and the above-mentioned supported metallocene Catalyst, feed ethylene, and react at 1.0Mpa, 80°C for a certain period of time. After cooling down, filter and dry to obtain polymer powder. See Table 2 for the data.

Embodiment 5~8

[0050] With embodiment 2, difference is to use Na 2 SiO 3 instead of NaAlO 2 , Na 2 SiO 3 The added amounts were 1.01 g, 2 g, 4 g and 8 g, respectively. See Table 1 and Table 2 for the data.

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Abstract

The present invention discloses a supported metallocene catalyst carrier, which is prepared according to the following method, wherein the method comprises: a) adopting an aqueous solution of an inorganic salt to treat an inorganic carrier, adding an acid to adjust to achieve a neutral state, carrying out a reaction for 0.5-24 h at a temperature of 25-80 DEG C, filtering, and drying to obtain a solid; and b) baking the solid obtained in the step a) at a temperature of 200-800 DEG C in an inert atmosphere to obtain the carrier. According to the present invention, the preparation method of the supported metallocene catalyst carrier is simple and is easy to perform, and the catalysis activity of the catalyst can be significantly increased after the supported metallocene catalyst carrier is used for the supported metallocene catalyst.

Description

technical field [0001] The invention relates to a catalyst carrier, in particular to a carrier for a supported metallocene catalyst. The present invention also relates to a supported metallocene catalyst comprising the support described above. Background technique [0002] In the field of olefin polymerization, metallocene catalysts catalyze olefin polymerization to obtain polymers with narrow molecular weight distribution and narrow branch chain distribution. Due to the wide selection of catalyst ligands and the strong ability to regulate polymers, the "customization" of polymers can be realized, so the scope of application in olefin polymerization is becoming more and more extensive. For example, metallocene catalysts can be used to catalyze the homopolymerization or copolymerization of monomers such as ethylene and propylene, and can be applied to solution polymerization processes, and can be used in gas phase, slurry and other polymerization processes after loading. ...

Claims

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Application Information

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IPC IPC(8): C08F4/02C08F4/6592C08F10/00C08F10/02
Inventor 郑刚王洪涛王伟范国强刘长城胡青
Owner CHINA PETROLEUM & CHEM CORP