Catalyst component for olefin polymerization and catalyst thereof

An olefin polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of limited polymer application, narrow molecular weight distribution, unsatisfactory polypropylene stereoregularity, etc.

Active Publication Date: 2011-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the present inventors found that when the spherical catalyst prepared by using diol ester compound as the internal electron donor and the magnesium chloride alcoholate as the carrier is used for propylene polymerization, the stereoregularity of the obtained polypropylene is still unsatisfactory.
When the diether compound is used as the internal electron donor, the activity of the catalyst and the isotacticity of the polymer are very high, and even a high-yield, high-isotactic polymer can be obtained without an external electron donor, but , the molecular weight distribution of the polymer obtained by this type of catalyst is narrow, which limits the application of the polymer

Method used

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  • Catalyst component for olefin polymerization and catalyst thereof
  • Catalyst component for olefin polymerization and catalyst thereof
  • Catalyst component for olefin polymerization and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation of Spherical Magnesium Chloride Alcoholate Carrier

[0052] Mix anhydrous magnesium chloride and ethanol with a molar ratio of 1:2.6, heat up and react to form a magnesium chloride alcoholate melt, the reaction temperature is 90-140°C, stir at a high speed in the dispersion medium white oil and silicone oil, and then put it into a cooled In hexane, spherical magnesium chloride alcoholate particles are formed, and the spherical carrier is obtained after washing and drying.

[0053] Preparation of Spherical Catalyst Components

[0054] Add 100ml of titanium tetrachloride to a 300ml stirred glass reaction bottle fully replaced by high-purity nitrogen, cool to -20°C, add spherical magnesium chloride alkoxide, and slowly raise the temperature to 110°C in stages. Add 0.48g of 9,9-dimethoxymethylfluorene and 1.5ml of 2,4-pentanediol dibenzoate, keep the temperature at 110°C for 0.5h, filter off the liquid, and add titanium tetrachloride to treat twice , and then ...

Embodiment 2

[0058] Preparation of spherical catalyst component: same as Example 1 except 0.48 g of 9,9-dimethoxymethyl fluorene and 1.0 ml of 2,4-pentanediol dibenzoate.

[0059] Propylene polymerization: with embodiment 1.

Embodiment 3

[0061] Preparation of the spherical catalyst component: except that 2,4-pentanediol dibenzoate is replaced with 4-ethyl-3,5-heptanediol dibenzoate, the same as in Example 1.

[0062] Propylene polymerization: with embodiment 1

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Abstract

The invention provides a catalyst component for olefin polymerization, the catalyst component comprises an adduct shown as the general formula (I) of MgX2.m(R'OH).nE.qH2O, at least one titanium compound shown as the general formula (II) of Ti(OR)4-kXk, and at least two electron donor compounds of a and b, wherein the electron donor compound a is a diol ester compound, b is a diether compound, andthe molar ratio of a to b is 0.5-50. A catalyst shows ultra-high polymerization activity when the catalyst is used for olefin polymerization, in particular to propylene polymerization, and the obtained polymer simultaneously has wider molecular weight distribution and higher isotacticity.

Description

technical field [0001] The present invention relates to a catalyst component and catalyst for olefin polymerization, more specifically, to a spherical catalyst component containing at least two electron donor compounds, namely glycol ester compounds and diether compounds and its application. 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. At present, a large number of electron donor compounds suitable for preparing Ziegler-Natta catalysts have been disclosed, mainly including: phthalates (European patent EP0045977), 1,3-diethers (E...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/654C08F4/651C08F10/00
Inventor 赵瑾刘月祥夏先知王新生高平乔素珍尹茂平李威莅张继贵彭人琪
Owner CHINA PETROLEUM & CHEM CORP
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