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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 inapplicability to industrial production, high vacuum, and low activity of olefin polymerization

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

The problem with this catalyst is that the loading process requires high temperature and high vacuum, which 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

[0112] 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 non-metallocene ligand to obtain a contact product, and A step of treating the contact product with a chemical treatment agent to obtain the magnesium compound supported non-metallocene catalyst.

[0113]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.

[0114] 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 ), among which magnesium chloride is preferred.

[0115] Alkoxymagnesium halides such as can be selected from methoxymagnesium chloride (Mg(OCH 3 )Cl), ethox...

Embodiment 1

[0258] Magnesium compound is anhydrous magnesium chloride (MgCl 2 ), the chemical treatment agent uses titanium tetrachloride (TiCl 4 ).

[0259] The non-metallocene ligand adopts the structural formula compound of.

[0260] Weigh a certain amount of non-metallocene ligand, add 25ml of dichloromethane to dissolve, then add 5g of anhydrous magnesium chloride, react at 30°C for 4 hours, filter, wash with hexane twice, each 25ml, and then vacuum dry Get the contact product.

[0261] Measure 25ml of hexane solvent, add it to the contact product, add the chemical treatment agent dropwise for 15 minutes under the condition of stirring, react at 30°C for 4 hours, filter, wash with hexane 3 times, 25ml each time, and finally vacuumize Dry to obtain the supported non-metallocene catalyst.

[0262] The molar ratio of chemical treatment agent to non-metallocene ligand is 1:0.5. The molar ratio of the non-metallocene ligand to the magnesium compound is 1:5.

[0263] The catalyst i...

Embodiment 1-1

[0265] Basically the same as Example 1, but with the following changes:

[0266] The magnesium compound is changed to magnesium bromide (MgBr 2 ), the chemical treatment agent was changed to zirconium tetrachloride (ZrCl 4 ). The non-metallocene ligand adopts the structural formula as compound of.

[0267] The non-metallocene ligands were dissolved in toluene solvent, washed with toluene, and dried in vacuum.

[0268] The molar ratio of chemical treatment agent to non-metallocene ligand is 1:0.3.

[0269] The molar ratio of the non-metallocene ligand to the magnesium compound is 1:3.

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Abstract

The invention relates to a magnesium compound supported non-metallocene catalyst, which is obtained by directly contacting a compound of catalytic active metal and a magnesium compound containing a non-metallocene ligand through an in-situ supporting method. The preparation method for the magnesium compound supported non-metallocene catalyst has simple, feasible and flexible process, and has more adjustable parameters to the polymerization activity of the catalyst. When the supported non-metallocene catalyst and a catalyst promoter are adopted to form a catalytic system for the homopolymerization / copolymerization of olefins, the obtained polymer has high bulk density and low ash, and the molecular weight distribution of the polymer has wide adjustable range.

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 catalytically active metal compound with a magnesium compound containing a non-metallocene ligand through an in-situ loading method. By combining the magnesium compound-supported non-metallocene catalyst of the present invention with cocatalysts such as aluminoxane and alkylaluminum, it can be used to catalyze homopolymerization / 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 e...

Claims

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Application Information

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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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