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Homopolymerization and combined polymerization catalyst of ethylene and preparation method thereof

A technology for ethylene polymerization and copolymerization, which is applied in the field of solid titanium catalysts and can solve the problems of difficult polymer melting process and low catalytic activity of catalysts.

Inactive Publication Date: 2008-08-20
科莱恩催化剂(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods require additional equipment such as air drying equipment, and the prepared catalyst has low catalytic activity, and the obtained polymer contains very large particles, which makes the melting process of the polymer difficult.

Method used

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  • Homopolymerization and combined polymerization catalyst of ethylene and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1 4.76 grams (50 mmol) of anhydrous magnesium chloride, 75 milliliters of decane and 16.3 grams (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solution. To this solution was added 15 mmol of tributyl borate and stirred at 50° C. for 2 hours to dissolve tributyl borate in the solution. All the homogeneous solution obtained above was cooled to room temperature, and then added dropwise to 150 mL of titanium tetrachloride maintained at 0° C. within 1 hour while stirring. After completion of the dropwise addition, the temperature of the mixture was maintained at 0°C for 1 hour, then raised to 120°C over 2 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with hexane and decane respectively until no precipitated titanium compound can be detected in the cleaning liquid, and...

Embodiment 2

[0014] Example 2 4.76 grams (50 mmol) of anhydrous magnesium chloride, 75 milliliters of decane and 16.3 grams (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solution. To this solution was added 15 mmol of diethyl phenyl borate and stirred at 50° C. for 2 hours to dissolve diethyl phenyl borate in the solution. All the homogeneous solution obtained above was cooled to room temperature, and then added dropwise to 150 mL of titanium tetrachloride maintained at 0° C. within 1 hour while stirring. After completion of the dropwise addition, the temperature of the mixture was maintained at 0°C for 1 hour, then raised to 120°C over 2 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with hexane and decane respectively until no precipitated titanium compound can be detected in the cleaning...

Embodiment 3

[0017] Embodiment 3 is the same as embodiment 1, except that the addition of tributyl borate is 20mmol. The aggregation results are shown in Table 1.

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Abstract

The invention pertains to a ball-shaped solid titanium complex catalyst used for vinyl polymerization or copolymerization. The catalyst is prepared by the following method: (1) homogeneous magnesium solution is prepared by dissolving magnesium halide into alcoholic compound; (2) at least one organoboron compound without inactive hydrogen is added into the homogeneous magnesium solution; (3) the ball-shaped solid titanium complex catalyst is prepared by reaction of the said magnesium combination solution and titanium compound through recrystallization. The ball-shaped solid titanium complex catalyst demonstrates high catalytic activity of solid titanium complex catalyst used for vinyl polymerization or copolymerization, can be used for polymerization and copolymerization of ethylene to produce polymers with high bulk density, narrow particle size distribution and low fines content.

Description

technical field [0001] The present invention relates to a solid titanium catalyst for ethylene polymerization and copolymerization. The solid titanium catalyst exhibits high catalytic activity when used in ethylene polymerization and copolymerization, and can produce polymers with high bulk density, narrow particle size distribution and less fine powder content. technical background [0002] In recent years, the research on olefin polymerization catalysts has always been a hot topic in the field of polyolefin research. It is the goal pursued by researchers to develop polyolefin catalysts with high catalytic activity, good hydrogen adjustment sensitivity, uniform particle size distribution and less fine powder. The literature reports many processes using magnesium-containing titanium-based catalysts as catalysts for olefin polymerization and copolymerization. These catalysts provide high catalytic activity and yield polymers with high bulk density and are suitable for both ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/654
Inventor 郭琦姜勇
Owner 科莱恩催化剂(上海)有限公司
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