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Catalyst for ethylene homo- and co-polymerization

A technology for ethylene homopolymerization and catalyst, which is applied in the field of high-activity titanium solid composite catalysts

Inactive Publication Date: 2002-10-09
HANWHA TOTAL PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned effect is obtained by using an external electron donor in addition to a solid catalyst, and it is limited to the polymerization and copolymerization of propylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 prepares catalyst

[0038] Prepare a solid composite titanium catalyst through the following three-step process:

[0039] (i) step: preparation of magnesium solution

[0040] A 1.0L reactor equipped with mechanical stirring was replaced with nitrogen, and 9.5g (0.1mol) of magnesium chloride and 400ml of toluene were added thereto. After stirring at 300 rpm, 62 ml (0.4 mol) 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 70°C.

[0041] (ii) step: contact reaction of magnesium solution, ester containing one hydroxyl group and alkoxysilane compound

[0042] To the above-mentioned magnesium solution cooled to 70° C., 1.2 ml (10 mmol) of (2-hydroxyethyl) methacrylate and 10.0 ml (45 mmol) of tetraethoxysilicon were added, and then the reaction was continued for 1 hour.

[0043] (iii) step: treatment of titanium compound and silico...

Embodiment 2

[0048] The catalyst was prepared in the same manner as in Example 1, except that in step (ii) of Example 1, the temperature of the magnesium solution was adjusted to room temperature (25° C.). The titanium content of the catalyst thus prepared was 3.2%. Polymerization was carried out as in Example 1, and the results are listed in Table 1.

Embodiment 3

[0050] A catalyst was prepared in the same manner as in Example 2, except that in step (ii) of Example 2, 2.4 ml of (2-hydroxyethyl) methacrylate and 10.0 ml of tetraethoxysilicon were used. The titanium content of the catalyst thus prepared was 2.9%. 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 ethylene homopolymerization or copolymerization, or more specifically, to a solid composite titanium catalyst for ethylene homopolymerization or copolymerization. The preparation of the catalyst is accomplished by the following steps: making a halogenated magnesium compound A magnesium solution is prepared by contact reaction with an alcohol, the solution is reacted with an ester compound having at least one hydroxyl group and a silicon compound having an alkoxy group, and then the solution is reacted with a mixture of a titanium compound and a silicon compound. The catalyst of the invention has high activity and excellent hydrogen regulation sensitivity.

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, said catalysts exhibiting high catalytic activity, high bulk density, and high hydrogen sensitivity. Background of the invention [0002] Magnesium-containing catalysts are known for the polymerization or copolymerization of ethylene with very high catalytic activity and with high bulk density, which are suitable for liquid-phase or gas-phase polymerizations, respectively. 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 considering the applicability, it includes the following: high activity , bulk density, the amount of low molecular weight molecules dissolv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/642C08F4/64C08F4/656C08F4/658C08F10/00C08F10/02C08F110/02
CPCC08F10/02C08F110/02Y02P20/52C08F4/651C08F4/6365C08F2500/12C08F2500/18C08F4/64
Inventor 杨春炳
Owner HANWHA TOTAL PETROCHEMICAL CO LTD
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