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Polyolefin catalyst adopting carbon nanotubes as carriers and preparation method thereof

A technology of carbon nanotubes and catalysts, which is applied in the field of polyolefin catalysts and its preparation, and can solve the problems of high price and technical difficulty

Inactive Publication Date: 2014-09-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But for now, due to technical and operational difficulties, most researchers are only engaged in basic theoretical research, and the research focus is limited to using expensive catalysts and co-catalysts ( CN1640923A), but fail to utilize the lower Ziegler-Natta catalyst of cost to directly prepare polyolefin nanocomposite material on a large scale
In addition, there is no report about the preparation of carbon nanotubes into a morphological carrier and loading polyolefin in the literature on the problem of the morphology of the catalyst carrier particles mentioned in the article.

Method used

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  • Polyolefin catalyst adopting carbon nanotubes as carriers and preparation method thereof
  • Polyolefin catalyst adopting carbon nanotubes as carriers and preparation method thereof
  • Polyolefin catalyst adopting carbon nanotubes as carriers and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0064] 1) Disperse 1.0 gram (0.083mol) of carbon nanotube catalyst support in 50ml of ether under a nitrogen atmosphere, and then add 0.83molC 4 h 9 50ml of ether solution of MgBr was added dropwise to the suspension of carbon nanotubes, refluxed at 40°C for 10.0 hours, after the reaction was completed, washed with ether for 5 times, and dried to obtain 0.90g of magnesium composites supported by carbon nanotube catalysts . Wherein, the mass percent content of magnesium element is 3.28wt%.

[0065] 2) Take 0.5 grams (0.042mol) of the magnesium composite of the carbon nanotube catalyst carrier prepared in step 1) at -20°C and disperse it in 10ml of transition metal compound Ziegler-Natta catalyst titanium tetrachloride and react for 2.0 hours, and slowly heat up to At 80°C, add 0.10 g (0.35 mmol) of dibutyl phthalate as an auxiliary agent, continue to heat up to 120°C and react for 2.0 hours. After the reaction is completed, filter, wash with hexane for 3 to 6 times, and dry t...

Embodiment 2

[0072] 1) Disperse 10.0 g (0.83 mol) of carbon nanotube catalyst carrier in 50 ml of tetrahydrofuran under nitrogen atmosphere, then add 8.3 mol of C 4 h 9 The 50ml tetrahydrofuran solution of MgCl was added dropwise in the suspension of carbon nanotubes, refluxed at a constant temperature at 70°C for 20.0 hours, after the reaction was completed, washed 5 times with tetrahydrofuran, and dried to obtain the magnesium composite (-OMgCl ). Wherein, the mass percentage content of magnesium element is 5.0wt%.

[0073] 2) Take 5.0 grams (0.42mol) of the magnesium composite of the carbon nanotube catalyst carrier prepared in step 1) at -20°C and disperse it in 100ml of transition metal compound Ziegler-Natta catalyst titanium tetrachloride and react for 1.0 hour, and slowly heat up to Add 0.24 g (1.0 mmol) of auxiliary agent fluorene diether at 60°C, continue to heat up to 120°C and react for 1.0 hour. After the reaction is completed, filter, wash with hexane for 3 to 6 times, and ...

Embodiment 3

[0079] 1) Disperse 1.0 g (0.083 mol) of carbon nanotube catalyst carrier in 50 ml of tetrahydrofuran under a nitrogen atmosphere, and then add 0.05 mol of C 4 h 9 The 50ml tetrahydrofuran solution of MgBr is added dropwise in the suspension of carbon nanotubes, 10.0 hours of constant temperature reflux reaction at 130 ℃, after reaction is finished, use tetrahydrofuran to wash 5 times, obtain the magnesium complex (OMgBr of carbon nanotube catalyst carrier after drying) ). Wherein, the mass percentage content of magnesium element is 1.5wt%.

[0080] 2) Take 0.5 g (0.042 mol) of the magnesium composite of the carbon nanotube catalyst carrier prepared in step 1) at -20°C and disperse it in 10 ml of transition metal compound Ziegler-Natta catalyst titanium tetrachloride for 2.0 hours, and heat up to 120 react at ℃ for 1.0 hour, and after the reaction is completed, filter, wash with hexane for 3 to 6 times, and dry to obtain a transition metal titanium catalyst supported by carbo...

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Abstract

The invention discloses a polyolefin catalyst adopting carbon nanotubes as carriers and a preparation method thereof. The polyolefin catalyst adopting carbon nanotubes as carriers comprises carbon nanotube catalyst carriers and catalytic activity components, wherein the polyolefin catalyst contains 80.0 to 99.0% by mass of carbon nanotubes and 1.0 to 20.0% by mass of the catalytic activity components. The preparation method of the polyolefin catalyst adopting carbon nanotubes as carriers comprises the following steps of compounding reaction substances and the carbon nanotube catalyst carriers, and carrying out loading of at least one transition metal compound. The polyolefin catalyst adopting carbon nanotubes as carriers has a spherical particle surface appearance, and contains the catalytic activity components which are uniformly distributed on the surface and in the interior of the spherical polyolefin catalyst adopting carbon nanotubes

Description

technical field [0001] The invention relates to a carrier-loaded polyolefin catalyst and a preparation method thereof, in particular to a polyolefin catalyst with carbon nanotubes as a carrier and a preparation method thereof. Background technique [0002] The development of human history is closely related to materials, and polyolefin, as one of the most widely used general materials, is naturally closely related to the production process of human beings. In the polyolefin industry, the support of polyolefin catalysts plays a pivotal role. The reasons are: 1) the active center can be released smoothly during the polymerization process through the support of the catalyst, and the polymerization process is easy to control; The control of the particle shape of the polymer can be further controlled. Among various carrier shapes, the spherical shape is undoubtedly the best choice. Compared with other forms, the spherical carrier can increase the fluidity of the polymerization ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/02C08F4/64C08F4/6592C08F4/643C08F4/642C08F4/645C08F10/02C08F10/06C08F210/16
Inventor 董金勇王宁秦亚伟黄英娟
Owner INST OF CHEM CHINESE ACAD OF SCI
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