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Olefin polymerization catalyst

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalysts, can solve the problems of low activity and low catalyst orientation ability, and achieve the effects of high catalytic activity, wide molecular weight distribution range and simple preparation method

Inactive Publication Date: 2015-12-23
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1954, Natta invented TICl3 / AIR3 polypropylene Ziegler-Natta (Z-N) catalyst, but at that time the catalyst had low orientation ability and low activity

Method used

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  • Olefin polymerization catalyst
  • Olefin polymerization catalyst
  • Olefin polymerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of olefin polymerization catalyst of the present invention, wherein general formula is the amount of the internal electron donor compound of I and MgCl 2 The molar ratio is 0.01, Ti(OR 1 ) The content of nXy is 5wt%, and the general formula is AlR 2 n x 3-n The content of organoaluminum compounds is MgCl 2 10 times.

[0017] Preferably, the structure of the internal electron-donating compound is:

[0018]

[0019] Preferably, the structure of the organoaluminum compound can be one or more of trimethylaluminum, triethylaluminum, tripropylaluminum, monochlorodiethylaluminum, dichloroethylaluminum or triisobutylaluminum .

[0020] Preferably, the silane-type external electron-donating compound may be one or more of tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilylmethyltriethoxysilane.

[0021] Preferably, Ti(OR 1 )nXy is TiCl 4 .

Embodiment 2

[0023] A kind of olefin polymerization catalyst of the present invention, wherein general formula is the amount of the internal electron donor compound of I and MgCl 2 The molar ratio is 0.05, Ti(OR 1 ) The content of nXy is 10wt%, and the general formula is AlR 2 n x 3-n The content of organoaluminum compounds is MgCl 2 50 times.

[0024] Preferably, the structure of the internal electron-donating compound is:

[0025]

[0026] Preferably, the structure of the organoaluminum compound can be one or more of trimethylaluminum, triethylaluminum, tripropylaluminum, monochlorodiethylaluminum, dichloroethylaluminum or triisobutylaluminum .

[0027] Preferably, the silane-type external electron-donating compound may be one or more of tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilylmethyltriethoxysilane.

[0028] Preferably, Ti(OR 1 )nXy is TiCl 4 .

Embodiment 3

[0030] A kind of olefin polymerization catalyst of the present invention, wherein general formula is the amount of the internal electron donor compound of I and MgCl 2 The molar ratio is 0.05, Ti(OR 1 ) The content of nXy is 10wt%, and the general formula is AlR 2 n x 3-n The content of organoaluminum compounds is MgCl 2 50 times.

[0031] Preferably, the structure of the internal electron-donating compound is:

[0032]

[0033] Preferably, the structure of the organoaluminum compound can be one or more of trimethylaluminum, triethylaluminum, tripropylaluminum, monochlorodiethylaluminum, dichloroethylaluminum or triisobutylaluminum .

[0034] Preferably, the silane-type external electron-donating compound may be one or more of tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilylmethyltriethoxysilane.

[0035] Preferably, Ti(OR 1 )nXy is TiCl 4 .

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Abstract

The invention provides an olefin polymerization catalyst which comprises magnesium halide, titanium halide, active organic aluminum compounds and electron donor compounds disclosed as general formula I. The catalyst has the advantages of high activity and wider molecular weight distribution range of the olefin polymerization products due to the unique molecular structure and electron distribution, and thus, has favorable practical production meanings.

Description

technical field [0001] The invention belongs to the technical field of olefin polymerization, and in particular relates to an olefin polymerization catalyst. Background technique [0002] Polypropylene is the fastest-growing variety among various polyolefin materials, and its output is second only to polyethylene in the world. In 1954, Natta invented TICl3 / AIR3 polypropylene Ziegler-Natta (Z-N) catalyst, but at that time the catalyst had low orientation ability and low activity. By the middle and late 1960s, certain Lewis bases (called internal electron donors) were mixed into titanium trichloride crystals by mechanical grinding or chemical methods, so that the surface area of ​​the catalyst was greatly increased, and the obtained polypropylene isotacticity reached 90-96%. People have gradually found that the electron donor introduced in the catalyst plays a key role in improving the performance of the catalyst. The electron donor can not only improve the activity and orie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/646C08F4/649C08F10/00
Inventor 刘姝王晓宁
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY