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Supported metallocene catalyst component and preparation method thereof and use

A metallocene catalyst and carrier technology, applied in the field of metallocene catalyst components, can solve the problems of affecting the distribution of polymer particles, unsatisfactory control of catalyst particle shape, and inability to adapt to industrial devices, etc.

Active Publication Date: 2009-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shape control of the obtained catalyst particles is not ideal, which eventually affects the distribution of polymer particles and increases the fine powder, which cannot be adapted to existing industrial devices.

Method used

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  • Supported metallocene catalyst component and preparation method thereof and use
  • Supported metallocene catalyst component and preparation method thereof and use
  • Supported metallocene catalyst component and preparation method thereof and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 1) Preparation of magnesium chloride / silica gel carrier

[0064] Under nitrogen protection, in a glass reactor, add 0.52 grams of anhydrous magnesium chloride at room temperature, then add 350 milliliters of dried tetrahydrofuran, after starting to stir, 13.9 grams of silica gel (GRACE 955, under nitrogen, roast at 150 ° C for 2.5 hours, heat up to 300°C for 2 hours, then at 600°C for 5 hours) into the reactor, heated to 65°C, stirred and dissolved for 2 hours, then evaporated at 80°C to remove the solvent to obtain a white solid powder. The white solid powder was vacuum-dried at 100° C. for 2 hours, and then vacuum-dried at 300° C. for 10 hours to obtain 10.8 g of a solid powder with good fluidity. Through gas chromatography analysis, no tetrahydrofuran was detected.

[0065] 2), preparation of alkylaluminoxane / magnesium chloride / silica gel carrier

[0066] Under the protection of nitrogen, take 4.64 grams of the magnesium chloride / silica gel carrier obtained above an...

Embodiment 2

[0075] Improve the magnesium chloride consumption, all the other are with embodiment 1.

[0076] 1), preparation of alkylaluminoxane / silica gel carrier

[0077] Under nitrogen protection, in a glass reactor, add 0.8 gram of anhydrous magnesium chloride at room temperature, then add 250 milliliters of dried tetrahydrofuran, after starting to stir, mix 7.0 grams of silica gel (GRACE 955, average particle diameter 45 microns, under nitrogen, 150 ℃ for 2.5 hours, heated to 300℃ for 2 hours, then baked at 600℃ for 5 hours) into the reactor, heated to 65℃, stirred and dissolved for 2 hours, then evaporated at 80℃ to remove the solvent to obtain a white solid powder . The white solid powder was vacuum-dried at 100°C for 2 hours, and then vacuum-dried at 300°C for 10 hours to obtain a solid powder with good fluidity. According to gas chromatography analysis, no tetrahydrofuran was detected.

[0078] 2), preparation of alkylaluminoxane / magnesium chloride / silica gel carrier

[0079] ...

Embodiment 3

[0083] Improve magnesium chloride consumption again, all the other are with embodiment 1.

[0084] 1), preparation of alkylaluminoxane / silica gel carrier

[0085]Under nitrogen protection, in a glass reactor, add 0.81 g of anhydrous magnesium chloride at room temperature, then add 300 ml of dried tetrahydrofuran, start stirring, and 5.94 g of silica gel (GRACE 955, under nitrogen, roast at 150 ° C for 2.5 hours, heat up to 300°C for 2 hours, then at 600°C for 5 hours) into the reactor, heated to 65°C, stirred and dissolved for 2 hours, then evaporated at 80°C to remove the solvent to obtain a white solid powder. The white solid powder was vacuum-dried at 100°C for 2 hours, and then vacuum-dried at 300°C for 10 hours to obtain a solid powder with good fluidity. According to gas chromatography analysis, no tetrahydrofuran was detected.

[0086] 2), preparation of alkylaluminoxane / magnesium chloride / silica gel carrier

[0087] Under the protection of nitrogen, take 2.67 grams o...

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Abstract

The invention discloses a loading metallocene catalyst composition which is obtained through adopting an alkyl aluminoxane / magnesium chloride / silica gel carrier as a carrier and loading a metallocene catalyst precursor, and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. Compared with a common loading metallocene catalyst with an alkyl aluminoxane / silica gel carrier, the activity can be doubled or more. The carrier is simple to prepare; the prepared loading catalyst granule has good shape and adjustable size; and the obtained polythene powdery material has high stacking density.

Description

technical field [0001] The present invention relates to a component of a supported metallocene catalyst, its preparation method, and its application in olefin polymerization. Background technique [0002] The development and application of metallocene catalysts is another major breakthrough in the field of olefin polymerization catalysts after the traditional Ziegler-Natta catalysts, especially in the 1980s, Kaminsky and Sinn et al. (Angew.Chem., 1980,19,390; Adv. Organoment.Chem., 1980, 18, 99.) developed a high-efficiency cocatalyst methylaluminoxane (MAO), making the research on metallocene catalysts enter a stage of rapid development. Because the homogeneous metallocene catalyst requires a large amount of MAO to achieve high activity, the production cost is high, and the obtained polymer is amorphous, which cannot be used in the widely used slurry method or gas phase polymerization process. An effective way is to support the soluble metallocene catalyst. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/02C08F4/42
Inventor 刘东兵邢文辉廖浩瀚王洪涛徐世媛傅捷程晓静
Owner CHINA PETROLEUM & CHEM CORP
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