Supported metallocene catalyst and application thereof

A metallocene catalyst, supported technology, applied in the field of supported metallocene catalysts, can solve the problem of difficult control of polymer morphology, and achieve the effect of simple operation

Inactive Publication Date: 2011-08-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a major problem with the supported metallocene catalysts prepared with the above various supports: the polymer morphology is difficult to control when used in olefin polymerization

Method used

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  • Supported metallocene catalyst and application thereof
  • Supported metallocene catalyst and application thereof
  • Supported metallocene catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The main catalyst is: Cp 2 ZrCl 2 ;

[0025] The carrier is: titanium dioxide nanotubes;

[0026] Preparation of supported catalyst: 1 gram of titania nanotubes and 50 mL of methylaluminoxane (20 mmol) were stirred at 50° C. for 5 hours. After filtration, it was washed with 25 ml of toluene, and the liquid was removed by filtration. Then add 50 ml of toluene and Cp with AlZr ratio of 50 2 ZrCl 2 Stir at 50°C for 5 hours, filter and wash 5 times with 25 ml of toluene each time, and then filter to remove the liquid to obtain a solid supported catalyst. All operations are performed under nitrogen protection.

[0027] Ethylene polymerization: The ethylene polymerization pressure is 0.13MPa, the polymerization temperature is 60°C, the polymerization solvent is 100mL toluene, the supported catalyst concentration is 2.5μmolZr / L, and the cocatalyst is methylaluminoxane (MAO). After polymerization for 0.5 hours, the reaction was terminated with 10% ethanol solution of hydr...

Embodiment 2

[0031] With main catalyst Cp in embodiment 1 2 ZrCl 2 Change to (CH 3 ) 2 C[Cp,Ind]ZrCl 2 , all the other are with embodiment 1.

[0032] The ethylene polymerization activity and polymer properties are shown in the following table: Polyethylene morphology is shown in Figure 2

[0033]

Embodiment 3

[0035] Change ethylene in embodiment 1 into ethylene and octene-1 copolymerization, wherein octene content is 15%, all the other are the same as embodiment 1.

[0036] The ethylene polymerization activity and polymer properties are shown in the following table: Polyethylene morphology is shown in Figure 3

[0037]

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Abstract

The invention relates to a novel supported metallocene catalyst and application thereof. The supported metallocene catalyst is prepared by using titanium dioxide nano tubes as carriers and used for catalyzing olefin polymerization. The supported catalyst can be used for preparing polyolefin of different forms under different polymerization conditions.

Description

technical field [0001] The invention relates to a supported metallocene catalyst for olefin polymerization. Background technique [0002] The supported metallocene catalyst means that the metallocene compound and the cocatalyst are supported on the carrier and exist in a heterogeneous phase. At present, the selected inorganic carriers mainly include: silica, alumina, montmorillonite and so on. One major problem with the supported metallocene catalysts prepared with the above supports is that the polymer morphology is difficult to control when used in the polymerization of olefins. Polymer morphology directly affects the processing and thermodynamic properties of polymers. [0003] In order to obtain a supported metallocene catalyst that can effectively control the polymer morphology, the effective coordination and selection of the support, main catalyst and cocatalyst in the catalyst is still an important research topic in this field. Contents of the invention [0004] ...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/6592C08F4/02C08F110/02C08F210/16
Inventor 刘承斌胡璋罗胜联
Owner HUNAN UNIV
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