Load type catalyst, load type non-metallocene catalyst and preparations thereof

A supported catalyst, non-metallocene technology, applied in the field of supported catalysts for olefin polymerization, can solve the problems of short polymerization activity life, low olefin polymerization activity, low polymer bulk density, etc., and achieve the effect of simple preparation method

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

In this method, due to the inhomogeneity of magnesium chloride solution deposited on the silica carrier during the subsequent evaporation process, it is still difficult to avoid the existence of free magnesium chloride, which will eventually affect the particle shape and bulk density of the polymer.
[0018] Even so, the ubiquitous problems of the supported catalysts in the prior art are that the olefin polymerization activity is low and the adjustment range is narrow. In addition, when the supported catalysts of the prior art are used for catalyzed polymerization of olefins, the obtained polyethylene etc. The material has low polymer bulk density and non-uniform particle distribution. Moreover, the supported catalysts in the prior art also have the problems of short polymerization activity life and relatively unstable polymerization kinetic curves

Method used

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  • Load type catalyst, load type non-metallocene catalyst and preparations thereof
  • Load type catalyst, load type non-metallocene catalyst and preparations thereof
  • Load type catalyst, load type non-metallocene catalyst and preparations thereof

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preparation example Construction

[0122] First of all, the present invention relates to a method for preparing a supported catalyst, including: dissolving a magnesium compound in a mixed solvent composed of tetrahydrofuran and alcohol to obtain a magnesium compound solution; mixing a porous carrier with the magnesium compound solution to obtain a mixed solvent The step of slurrying; the step of drying the mixed slurry to obtain a composite support; and the step of contacting a chemical treatment agent selected from group IVB metal halides with the composite support to obtain the supported catalyst.

[0123] The procedure for obtaining the magnesium compound solution will be described below first.

[0124] According to an embodiment of the present invention, the magnesium compound may be selected from, for example, magnesium halides, alkoxy magnesium halides, alkoxy magnesium, alkyl magnesium, alkyl magnesium halides, alkyl alkoxy magnesium or any one thereof Or a mixture of multiple.

[0125] Specifically, the mag...

Embodiment 1

[0306] Example 1 (Preparation example of supported catalyst)

[0307] The porous carrier uses silica gel, the magnesium compound uses anhydrous magnesium chloride, the alcohol uses ethanol, and the chemical treatment agent uses titanium tetrachloride.

[0308] The silica gel was continuously calcined at 600° C. under a nitrogen atmosphere for 4 hours to be thermally activated.

[0309] Weigh 5g of anhydrous magnesium chloride, add 15ml of tetrahydrofuran and 12.5ml of absolute ethanol, heat to 60℃ to completely dissolve, add 10g of heat-activated silica gel while it is hot, stir evenly, let it stand for 12 hours, and heat it to 90℃ evenly After vacuum drying, 18.5 g of composite carrier was obtained.

[0310] Weigh 8g of composite carrier, add 76ml of hexane, add 4.0ml of titanium tetrachloride dropwise over 30 minutes under stirring conditions, stir for 4 hours at 60℃, filter, wash with hexane twice, and use 60ml of hexane each time , 25 ℃ vacuum drying to obtain the supported ca...

Embodiment 1-1

[0313] It is basically the same as embodiment 1, but has the following changes:

[0314] The porous carrier uses aluminum oxide. The aluminum oxide was fired continuously at 700°C under nitrogen atmosphere for 6 hours.

[0315] Magnesium compound changed to magnesium bromide (MgBr 2 ), butanol is used for alcohol, and titanium tetrabromide (TiBr 4 ).

[0316] The ratio is that the molar ratio of magnesium bromide to tetrahydrofuran is 1:5; the molar ratio of magnesium bromide to butanol is 1:3.5; the mass ratio of magnesium bromide to porous carrier is 1:1.4; titanium tetrabromide and composite The carrier ratio is 7.64 mmol: 1 g.

[0317] The solvent for the preparation of the supported catalyst was changed to decane.

[0318] The supported catalyst is denoted as CAT-1-1.

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Abstract

The invention relates to a method for preparing a supported catalyst by supporting a chemical treatment agent on a composite carrier formed by a magnesium compound and a porous carrier, and a method for preparing the supported non-metallocene catalyst by further supporting a supported non-metallocene complex on the supported catalyst. The invention also relates to the supported catalyst and the supported non-metallocene catalyst which are prepared through the methods respectively. The range of polymerization activities of the catalysts is flexible and adjustable. When the catalysts are adopted for catalytic polymerization of ethylene and so on, an ethylene homopolymer / copolymer with high bulk density and evenly-distributed polymer particles can be prepared. Moreover, the catalysts have longer life of the polymerization activities and relatively stable polymerization kinetics curves.

Description

Technical field [0001] The present invention relates to a supported catalyst for olefin polymerization. Specifically, the present invention first relates to a method for preparing a supported catalyst by supporting a chemical treatment agent on a composite carrier formed of a magnesium compound and a porous carrier, and further adding A method for preparing a supported non-metallocene catalyst by supporting a non-metallocene complex on the catalyst. The present invention also relates to supported catalysts and supported non-metallocene catalysts prepared by these methods respectively. By combining the supported catalyst or supported non-metallocene catalyst of the present invention with a cocatalyst such as aluminoxane or aluminum alkyl, it can be used to catalyze the homopolymerization / copolymerization of ethylene. Background technique [0002] The modern olefin polymerization industry (such as gas phase process and slurry process) requires supported or supported olefin polymeri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/654C08F4/02C08F10/00
Inventor 顾越峰李传峰马忠林黎地王亚明王兴仁陈韶辉李晓强
Owner SINOPEC YANGZI PETROCHEM
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