Catalyst for ethylene homo-and co-polymerization

An ethylene homopolymerization and catalyst technology, applied in the field of high-activity titanium solid composite catalysts, can solve problems such as low catalyst activity and problems

Inactive Publication Date: 2002-07-17
SAMSUNG GENERAL CHEMICALS CO. LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods require a lot of catalyst production equipment, such as spray drying equipment and other equipment, and the catalyst obtained has the disadvantage of low activity
Also, problems can arise during melt processing due to the presence of very large particles in the polymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 prepares catalyst

[0036] Prepare a solid composite titanium catalyst through the following three-step process:

[0037] (i) step: preparation of magnesium solution

[0038] A 1.0 L reactor equipped with mechanical stirring was replaced with nitrogen, and 9.5 g of magnesium chloride and 400 ml of decane were added thereto. After stirring at 300 rpm, 60 ml of 2-ethylhexanol was added. The temperature was raised to 120°C, and the reaction was continued for 3 hours. The homogeneous solution obtained after the reaction was cooled to room temperature (25°C).

[0039] (ii) step: contact reaction of magnesium solution, ester containing a hydroxyl group and alkoxy boron compound

[0040] To the above-mentioned magnesium solution cooled to room temperature, 1.2 ml of (2-hydroxyethyl) methacrylate and 5.1 ml of trimethyl borate were added, and then the reaction was continued for 1 hour.

[0041] (iii) step: treatment of titanium compound and silicon compound mi...

Embodiment 2

[0046] In step (ii) of Example 1, 1.2 ml of (2-hydroxyethyl) methacrylate and 7.7 ml of trimethyl borate were used to prepare the catalyst. The titanium content of the catalyst thus prepared was 3.4%. Polymerization was carried out as in Example 1, and the results are listed in Table 1. Example 3

Embodiment 3

[0047] In step (ii) of Example 1, 1.2 ml of (2-hydroxyethyl) methacrylate and 7.6 ml of triethyl borate were used to prepare the catalyst. The titanium content of the catalyst thus prepared was 3.5%. Polymerization was carried out as in Example 1, and the results are listed in Table 1.

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PUM

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Abstract

The present invention relates to a catalyst for homo-polymerization or co-polymerization of ethylene, or more particularly to a solid complex titanium catalyst for homo-polymerization or co-polymerisation of ethylene, said catalyst being produced by preparing a magnesium solution by contact-reacting a halogenated magnesium compound with alcohol, reacting said solution with an ester compound having at least one hydroxy group and a boron compound having an alkoxy group, and then reacting said solution with a mixture of a titanium compound and a silicon compound. The catalyst of the present invention has good activity, and the polymers produced by means of the catalyst herein has advantages in that the polymers have high bulk density with narrow particle distribution and a reduced amount of fines particles.

Description

field of invention [0001] The present invention relates to catalysts for the homopolymerization or copolymerization of ethylene, or more specifically, to highly active titanium solid composite catalysts supported on magnesium-containing supports, which can be prepared with a narrow particle distribution and low fines content of high bulk density polymers. Background of the invention [0002] Magnesium-containing catalysts for ethylene polymerization or copolymerization are known to have very good catalytic activity and have a high bulk density, which are suitable for liquid or gas phase polymerization. The liquid phase polymerization of ethylene refers to the polymerization process carried out in a medium such as ethylene bulk, isopentane, or hexane. As for the important characteristics of the catalyst used in this process, it includes the following: high activity, bulk density, solubility in The amount of low molecular weight molecules in a medium, the particle distributio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/642C08F4/64C08F4/658C08F10/00C08F10/02C08F110/02
CPCC08F110/02C08F10/02C08F4/651C08F4/6578C08F2500/12C08F2500/18C08F2500/24C08F4/64
Inventor 杨春炳金湘烈金浩连金恩遐
Owner SAMSUNG GENERAL CHEMICALS CO. LTD
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