Loaded type polyolefin catalyst, preparation method and application

A polyolefin catalyst and supported technology, which is applied in the field of preparation and application of supported polyolefin catalysts and catalysts, can solve the problems of unfavorable industrial production and high content of polymer fine powder in the product, and achieve good shape, low subdivision content, The effect of high bulk density

Inactive Publication Date: 2013-06-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalyst preparation method has good particle shape and high catalytic activity, the catalyzed product has a high content of fine polymer powder, which is not conducive to industrial production.

Method used

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  • Loaded type polyolefin catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 1g of magnesium dichloride, 20ml of n-decane, 3ml of ethanol, and 6.5ml of isooctyl alcohol into the reactor that has been fully replaced by nitrogen, stir and heat up to 120°C, and react at constant temperature for 2 hours. The solids are completely dissolved to form a uniform solution. Cool down to 50°C, add 0.05ml of ethylene glycol monomethyl ether, and react for 2h. Cool down to -20°C and add 10ml of silicon tetrachloride dropwise. After the dropwise addition, raise the temperature to 60°C to react for 2 hours to obtain a milky white turbid solution. Lower the system to -10°C, add 15ml of titanium tetrachloride dropwise, react for 1 hour, then raise the temperature to 70°C for 2 hours. Stop stirring, let stand, separate layers, filter, wash with hexane four times (30 milliliters each), and dry to obtain a spherical powdery solid catalyst with good fluidity and uniform particle size distribution.

Embodiment 2

[0027] Add 1g of magnesium dichloride, 20ml of n-decane, 1.5ml of ethanol, and 7ml of isooctyl alcohol into the reactor fully replaced by nitrogen, stir and heat up to 120°C, and react at constant temperature for 2h, and the solids are completely dissolved to form a uniform solution. Cool down to 50°C, add 0.2ml of ethylene glycol monomethyl ether, and react for 2h. Cool down to -20°C, add 20ml of silicon tetrachloride dropwise, and then raise the temperature to 60°C to react for 2 hours to obtain a milky white turbid solution. Lower the system to -10°C, add 20ml of titanium tetrachloride dropwise, react for 1h, then raise the temperature to 90°C for 2h. Stop stirring, let stand, separate layers, filter, wash with hexane four times (30 milliliters each), and dry to obtain a spherical powdery solid catalyst with good fluidity and uniform particle size distribution.

Embodiment 3

[0029] Add 1g of magnesium dichloride, 20ml of n-decane, 2.5ml of ethanol, and 8.5ml of isooctyl alcohol into the reactor that has been fully replaced by nitrogen, stir and heat up to 90°C, and react at constant temperature for 2 hours. The solids are completely dissolved to form a uniform solution. Cool down to 50°C, add 0.02ml of ethylene glycol monomethyl ether, and react for 2h. Cool down to -15°C and add 15ml of silicon tetrachloride dropwise. After the dropwise addition, raise the temperature to 70°C for 2 hours to obtain a milky white turbid solution. Lower the system to -20°C, add 25ml of titanium tetrachloride dropwise, react for 1h, then raise the temperature to 90°C for 2h. Stop stirring, let stand, separate layers, filter, wash with hexane four times (30 milliliters each), and dry to obtain a spherical powdery solid catalyst with good fluidity and uniform particle size distribution.

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Abstract

The invention relates to a loaded type polyolefin catalyst, a preparation method and an application, a main catalyst is composed of a carrier and a transition metal halide, a carrier is composed of a magnesium halide compound, a silicon halide compound, alcohol with carbon atoms number less than or equal to C5, and alcohol with carbon atoms number of C6-C20, wherein the mol ratio is 1: (0.1-20): (0.1-5): (0.01-10); the mol ratio of magnesium halide compound to transition metal halide is 1: (0.1-30); an organic alcohol ether compound is added during a preparation process of the main catalyst, wherein the mass ratio of the magnesium halide compound to the organic alcohol ether compound is 100: (0.1-20); and the mol ratio of the transition metal halide to cocatalyst in the main catalyst is 1:30-500. The catalyst has good particle form and uniform particle size distribution, the segmentation content of the obtained polymer through catalysis is low, the bulk density is high, and the loaded type polyolefin catalyst is suitable for an alkene slurry polymerization technology, gas phase polymerization technology or a combination polymerization technology.

Description

technical field [0001] The invention belongs to the fields of olefin polymerization catalysts and olefin polymerization, and in particular relates to a supported polyolefin catalyst for olefin homopolymerization or copolymerization and the preparation and application of the catalyst. Background technique [0002] It has been nearly 60 years since Ziegler-Natta catalyst came out. Although polyolefin catalysts such as metallocene and non-metallocene have appeared during this period, there are many problems in its industrialization, such as expensive co-catalysts and difficulties in supporting the main catalyst. Therefore, in terms of current industrial production and market share, the traditional Z-N catalyst will still be the leader in the field of olefin polymerization in the future. In recent years, Z-N catalyst products at home and abroad have emerged in an endless stream, and the catalyst stability and polymerization catalytic activity have also been continuously improved...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F210/16C08F4/70C08F4/649C08F4/646C08F4/656
CPCC08F210/16C08F110/02C08F4/651C08F4/6565C08F210/14C08F2500/18C08F4/646C08F4/649C08F4/656C08F4/70C08F10/00C08F4/022C08F4/16C08F4/52
Inventor 义建军卢建春黄启谷刘智胡徐腾刘宏吉张明革李红明高克京朱百春
Owner PETROCHINA CO LTD
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