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Magnesium compound load type non-metallocene catalyst and preparation thereof

A magnesium compound, non-metallocene technology, applied in the field of magnesium compound supported non-metallocene catalysts, can solve the problems of low olefin polymerization activity, high vacuum, unsuitable for industrial production and the like

Active Publication Date: 2009-04-22
SINOPEC YANGZI PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Patent EP708116 discloses that gasified zirconium tetrachloride is first contacted and loaded with a carrier at a temperature of 160-450 ° C, and then the supported zirconium tetrachloride is reacted with a lithium salt of a ligand to obtain a supported metallocene catalyst, and then passed It is used in the polymerization of olefins in combination with co-catalysts. The problem with this catalyst is that the loading process requires high temperature and high vacuum and is not suitable for industrial production.
[0017] Even so, the ubiquitous problem of the supported non-metallocene catalysts in the prior art is that the olefin polymerization activity is low, and in order to improve its activity, it is necessary to assist a higher cocatalyst dosage
Moreover, in the prior art, due to the use of silica gel and the like as a load carrier, the polymer obtained by polymerization contains ash, thereby limiting the practical use of the polymer.
In addition, when using the supported non-metallocene catalyst of the prior art, polymers such as polyethylene obtained have lower polymer bulk density

Method used

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  • Magnesium compound load type non-metallocene catalyst and preparation thereof
  • Magnesium compound load type non-metallocene catalyst and preparation thereof
  • Magnesium compound load type non-metallocene catalyst and preparation thereof

Examples

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preparation example Construction

[0110] First, the present invention relates to a preparation method of a magnesium compound-supported non-metallocene catalyst, comprising the following steps: contacting a magnesium compound with a chemical treatment agent selected from group IVB metal compounds to obtain a contact product, and using a non-metallocene The step of ligand processing the contact product to obtain the supported non-metallocene catalyst.

[0111] The magnesium compound is the carrier of the supported non-metallocene catalyst, such as magnesium halide, alkoxymagnesium halide, alkoxymagnesium, alkylmagnesium, alkylmagnesium halide, alkylalkoxymagnesium or Any one or a mixture of more.

[0112] Specifically, magnesium halide such as can be selected from magnesium chloride (MgCl 2 ), magnesium bromide (MgBr 2 ), magnesium iodide (MgI 2 ) and magnesium fluoride (MgF 2), etc., wherein magnesium chloride is preferred.

[0113] Alkoxymagnesium halides such as can be selected from methoxymagnesium chl...

Embodiment 1

[0281] Magnesium compound is anhydrous magnesium chloride (MgCl 2 ), the chemical treatment agent is titanium tetrachloride (TiCl 4 ).

[0282] Weigh 5g of anhydrous magnesium chloride, add 25ml of hexane as a solvent for the preparation of the contact product to disperse it, then add titanium tetrachloride dropwise for 30 minutes under stirring, react at 60°C for 4 hours, filter, wash with hexane for 3 times, 25ml each time, vacuum-dried to obtain the contact product. The molar ratio of titanium tetrachloride and magnesium compound was 1:2.

[0283] the structural formula The non-metallocene ligand is dissolved in hexane (ligand mass concentration is 100 g / liter), then add the contact product under stirring, filter after reacting for 4 hours, wash 2 times with hexane, each hexane consumption is 25ml, Then it was dried at 25 °C for 6 h to obtain the magnesium compound-supported non-metallocene catalyst.

[0284] The mass ratio of ligand to contact product is 0.11:1.

[0...

Embodiment 1-1

[0287] Basically the same as Example 1, but with the following changes:

[0288] The magnesium compound is changed to magnesium bromide (MgBr 2 ), the chemical treatment agent is titanium tetrabromide (TiBr 4 ), its molar ratio with the magnesium compound is 1:4.5.

[0289] The solvent used for the preparation of the contact product was changed to decane.

[0290] The non-metallocene ligand is changed to Dissolved in decane, the mass concentration of the ligand is 50 g / L, and the mass ratio of the ligand to the contact product is 0.22:1.

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Abstract

The invention relates to a magnesium compound supported non-metallocene catalyst, which is obtained by directly contacting a non-metallocene ligand and a magnesium compound containing transition metal through an in-situ supporting method. The preparation method for the magnesium compound supported non-metallocene catalyst has simple and feasible process, and the supporting capacity and the polymerization activity of the catalyst have wide adjustable range. When the magnesium compound supported non-metallocene catalyst is combined with a catalyst promoter to catalyze the homopolymerization / copolymerization of olefins, high polymerization activities of the olefins can be obtained only by using small amount of the catalyst promoter.

Description

technical field [0001] The invention relates to a supported non-metallocene catalyst for olefin polymerization. Specifically, the present invention relates to a magnesium compound-supported non-metallocene catalyst, which is obtained by directly contacting a non-metallocene ligand with a magnesium compound containing a catalytically active metal through an in-situ loading method. By combining the magnesium compound-supported non-metallocene catalyst of the present invention with cocatalysts such as aluminoxane or alkylaluminum, it can be used to catalyze the homopolymerization or copolymerization of olefins. Background technique [0002] The non-metallocene catalysts that appeared in the mid-to-late 1990s, also known as post-metallocene catalysts, the central atom of the main catalyst includes almost all transition metal elements, which is the fourth generation after Ziegler, Ziegler-Natta and metallocene catalysts Olefin polymerization catalysts, which have reached or even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/654C08F10/00
Inventor 顾越峰姚小利李传峰马忠林王亚明陈韶辉李晓强
Owner SINOPEC YANGZI PETROCHEM
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