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Compound carrier for olefin polymerization catalyst, catalyst components and the catalyst

A technology for olefin polymerization and composite carrier, which is applied in the field of composite carrier for olefin polymerization catalysts and its catalyst components and catalysts, and can solve problems such as unfavorable industrial production, unfavorable for stable control of composition, corrosion of spray drying equipment, etc.

Inactive Publication Date: 2005-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for propylene polymerization, in order to obtain high-isotactic propylene polymers, it is very necessary to add an internal electron donor, and the above-mentioned preparation method will not be conducive to stably controlling the composition of each component on the carrier.
At the same time, due to the large amount of titanium tetrachloride contained in the sprayed slurry, it is easy to cause corrosion to the spray drying equipment, which is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Preparation of magnesium chloride solution:

[0045] In use N 2 34.5 ml of ethanol, 18.5 ml of n-butanol, and 32.4 ml of tetrahydrofuran were sequentially added into a fully replaced glass reactor with stirring of 350 ml. Under the condition that the temperature in the glass reactor does not rise sharply, slowly add 9.5g of anhydrous magnesium chloride while stirring, then slowly raise the temperature, control the temperature in the reactor at about 60°C, and fully dissolve the anhydrous magnesium chloride in the solution while stirring . After the system was basically dissolved, it was maintained for another 2.5 hours to obtain a magnesium chloride solution.

[0046] 2. Preparation of composite carrier:

[0047] Add 6 g of fumed silica gel to the above solution, and stir thoroughly for 1 hour to form a slurry. Then carry out spray drying in a spray dryer, controlling the inlet temperature to 200°C and the outlet temperature to 130°C to obtain a spherical composi...

Embodiment 2

[0054] 1. Preparation of magnesium chloride solution:

[0055] In use N 2 34.5ml of ethanol and 45.5ml of isopropanol were sequentially added to the fully replaced 350ml stirred glass reactor. Under the condition that the temperature in the glass reactor does not rise sharply, slowly add 9.5g of anhydrous magnesium chloride while stirring, and then slowly raise the temperature, control the temperature in the reactor at about 75°C, and fully dissolve the anhydrous magnesium chloride in the solution while stirring . After the system was basically dissolved, it was maintained for another 2.5 hours to obtain a magnesium chloride solution.

[0056] 2. Preparation of composite carrier:

[0057] Add 5 g of fumed silica gel to the above solution, and stir thoroughly for 1 hour to form a slurry. Then control the inlet temperature at 190° C. and the outlet temperature at 110° C. for spray drying to obtain a spherical composite carrier with an average particle size of about 19 μm. T...

Embodiment 3

[0064] 1. Preparation of magnesium chloride solution:

[0065] In use N 2 23ml of ethanol and 36ml of n-butanol were sequentially added to the fully replaced 350ml stirred glass reactor. Under the condition that the temperature in the glass reactor is controlled not to rise sharply, slowly add 9.5 g of anhydrous magnesium chloride while stirring, and then slowly raise the temperature, control the temperature in the reactor at about 70°C, and fully dissolve the anhydrous magnesium chloride in the solution under stirring . After the system was basically dissolved, it was maintained for another 2.5 hours to obtain a magnesium chloride solution.

[0066] 2. Preparation of composite carrier:

[0067] Spray drying was carried out according to the conditions of Example 1 to obtain a spherical composite carrier with an average particle diameter of about 17 μm. The composition of analysis gained carrier is (parts by weight):

[0068] MgCl 2 : 47.5%; SO 2 : 23.2%; ethanol: 5.9%; ...

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Abstract

The invention discloses a composite carrier and catalyst constituents by using the composite carrier, wherein the composite carrier is a solution formed by contacting magnesium halide with one or multiple electron donor compounds, by mixing the solution with silica sols whose average particle diameter is less than 30 um and spray drying, spherical particles can be obtained. When being used for olefin polymerization along with the catalyst promoter constituents in particular for propone polymerization, the catalyst constituents have shown high polymerization activity and stereospecificity.

Description

technical field [0001] The present invention relates to a composite support for olefin polymerization, especially propylene polymerization or copolymerization catalyst, and catalyst components and catalysts using the composite support. technical background [0002] It is well known that high-efficiency supported Ziegler-Natta catalysts have been widely used in the polymerization of ethylene and propylene and their copolymerization with other α-olefins. In the published patented technology, the high-efficiency carrier-type catalyst usually uses magnesium chloride as a single carrier. In order to improve the catalytic activity, different physical or chemical methods are first used to prepare the magnesium chloride carrier, and then the transition metal compound and electron donor compound are loaded to form the catalyst activity. center. In terms of particle morphology, this type of catalyst can be divided into particle (non-spherical) shape and spherical shape. US4784983 an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02C08F10/00
Inventor 陈伟张天一张彤瑄李季禹王仪森杜宏斌闫力欣夏先知高平尹茂平
Owner CHINA PETROLEUM & CHEM CORP
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