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

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Problems solved by technology

There is a major problem with the supported metallocene catalysts prepared with the above vari

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

Example Embodiment

[0023] Example 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 titanium dioxide 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 then filtered to remove the liquid. Then add 50 ml of toluene and Cp with a ratio of 50 to aluminum zirconium 2 ZrCl 2 Stir at 50° C. for 5 hours, wash with 25 ml of toluene for 5 times after filtration, and then filter to remove the liquid to obtain a solid supported catalyst. All operations are performed under the protection of nitrogen.

[0027] Ethylene polymerization: ethylene polymerization pressure is 0.13MPa, polymerization temperature is 60℃, polymerization solvent is 100mL toluene, supported catalyst concentration is 2.5μmolZr / L, co-catalyst is methylaluminoxane (MAO), under different Al / Zr ratio conditions After 0.5 hours of polymerization, the rea...

Example Embodiment

[0030] Example 2

[0031] The main catalyst Cp in Example 1 2 ZrCl 2 Change to (CH 3 ) 2 C[Cp,Ind]ZrCl 2 , The rest is the same as in Example 1.

[0032] The polymerization activity of ethylene and the physical properties of the polymer are as follows: See Figure 2 for the form of polyethylene

[0033]

Example Embodiment

[0034] Example 3

[0035] The ethylene in Example 1 was changed to ethylene and octene-1 copolymerization, in which the octene content was 15%, and the rest was the same as in Example 1.

[0036] The polymerization activity of ethylene and the physical properties of the polymer are as follows: See Figure 3 for the form of polyethylene

[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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