Catalyst components for olefin polymerization and preparation method thereof

An olefin polymerization and catalyst technology, which is applied in the field of catalyst components and their preparation, can solve the problems of large differences in microstructure, different distribution of active centers and active centers, and large differences in catalyst performance.

Active Publication Date: 2013-02-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In some researches, the performance of the catalyst is improved by improving the catalyst preparation process. The microstructure of the solid catalyst components obtained by different preparation processes may be quite different, which will cause the number of active centers and the distribution of various active centers to be different. Therefore, Catalyst performance varies greatly

Method used

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  • Catalyst components for olefin polymerization and preparation method thereof
  • Catalyst components for olefin polymerization and preparation method thereof
  • Catalyst components for olefin polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Preparation of Spherical Catalyst Components

[0070] (A) In a 300ml stirred glass reaction bottle fully replaced by high-purity nitrogen, add 90ml of titanium tetrachloride and 10ml of hexane, cool to -20°C, add spherical magnesium chloride alcoholate carrier 8g (preparation method See Chinese patent CN1330086A),

[0071] (B) Under stirring, slowly raise the temperature step by step. When the temperature reaches 40°C, add 1.5ml of 2,4-pentanediol dibenzoate and 2-isopropyl-2-isoamyl-1,3 - Dimethoxypropane 1.5ml,

[0072] (C) Continue to heat up to 110°C, and after reaching the temperature, keep the temperature for 0.5h, remove the liquid by suction filtration,

[0073] (D) Add 100ml of titanium tetrachloride, raise the temperature to 110°C, keep the temperature for 1h after reaching the temperature, and remove the liquid by suction filtration. A total of three titanium treatments were added,

[0074] (E) Then wash five times with hexane, and obtain a spherical cata...

Embodiment 2

[0078] The preparation of spherical catalyst component: except 1.0ml of 2,4-pentanediol dibenzoate and 1.3ml of 2-isopropyl-2-isoamyl-1,3-dimethoxypropane are the same as the examples 1.

[0079] Propylene polymerization is with embodiment 1.

Embodiment 3

[0081] The preparation of spherical catalyst component: except 1.5ml of 2,4-pentanediol dibenzoate and 1.3ml of 2-isopropyl-2-isoamyl-1,3-dimethoxypropane are the same as in the example 1.

[0082] Propylene polymerization is with embodiment 1.

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Abstract

The invention provides a preparation method of catalyst components for olefin polymerization and catalyst components obtained thereby. In the preparation method, a spherical catalyst is prepared by using a spherical magnesium halide adduct as the carrier and employing a complex of diol ester compounds and 1,3-diether compounds as the internal electron donor; and the reaction temperature of the internal electron donor and the washing degree of the catalyst are controlled, so that the obtained catalyst presents surprisingly high polymerization activity and high stereoregular directivity when used for olefin polymerization (especially propylene polymerization) and still maintains a high activity even if the concentration of alkyl aluminum is very low; and the obtained polymer has wide molecular weight distribution and relatively low ash content.

Description

technical field [0001] The present invention relates to a catalyst component for olefin polymerization and its preparation method, more specifically, relates to a catalyst component with spherical magnesium halide adduct as carrier, glycol ester compound and diether compound as inner Electron donor spherical catalyst components and catalysts thereof. technical background [0002] It is well known that solid titanium-based catalyst components based on magnesium, titanium, halogen and electron donors are used for olefin polymerization, especially in the polymerization of propylene, which has high polymerization activity and stereospecificity. The electron donor compound is one of the essential components in the catalyst component, and with the development of the internal electron donor compound, the polyolefin catalyst is constantly updated. Catalysts using different internal electron donors have different characteristics, for example, some catalysts have higher polymerizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/654C08F4/651C08F4/02C08F10/06
Inventor 赵瑾夏先知刘月祥谭扬乔素珍彭人琪李威莅张纪贵高平张天一
Owner CHINA PETROLEUM & CHEM CORP
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