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Solid catalyst component and catalyst for olefinic polymerization

A solid catalyst, a technology for olefin polymerization, which is applied in the field of olefin polymerization and can solve the problems of insufficient molecular weight distribution of polypropylene and poor processing performance.

Active Publication Date: 2012-07-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the phthalates mentioned in many patents, specifically, di-n-butyl phthalate, diisobutyl phthalate, etc., the solid catalyst components obtained from such compounds, and cocatalyst The catalyst formed by components and external electron donors has high polymerization activity when used for propylene polymerization, and the stereospecificity of the polymer is good, but the molecular weight distribution of the obtained polypropylene is not wide enough, and the processability is not good

Method used

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  • Solid catalyst component and catalyst for olefinic polymerization
  • Solid catalyst component and catalyst for olefinic polymerization
  • Solid catalyst component and catalyst for olefinic polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of diethyl 2,3-diisopropyl-2-dicyanosuccinate (abbreviated as "JS" in Table 1): According to the implementation disclosed in International Patent Application No. PCT / CN2010 / 000202 In the method of Example 1, the amount of reactants and solvents in Example 1 was increased by 10 times, and 2,3-diisopropyl-2-dicyanosuccinate was purified by a chromatography column filled with silica gel. The crude ester was changed to vacuum distillation for separation and purification, and the 124-127°C fraction was collected under the pressure of 110-120 Pa. The infrared analysis of the product is consistent with the diethyl 2,3-diisopropyl-2-dicyanosuccinate obtained in Example 1 disclosed in PCT / CN2010 / 000202.

[0052] IR(cm -1 ): 2979, 2881, 2246, 1733, 1469, 1394, 1371, 1299.6, 1141. (2) Preparation of 2-isopropyl-2-(3-methylbutyl)-1,3-dimethoxypropane (referred to as "2#ether" in Table 1): According to Chinese Patent No. ZL91108297. 2 Prepared by the disclosed method....

Embodiment 2

[0054] (1) Preparation of catalyst components

[0055] Select magnesium alkoxide (d(0.5) is 26.4μm, Span value is 0.85) 10g and toluene 50ml, 2,3-diisopropyl-2-dicyanosuccinate prepared by the method of Example 1 (Abbreviated as "JS" in Table 1) 1.25ml, 2-isopropyl-2-(3-methylbutyl)-1,3-dimethoxypropane (abbreviated as "2#ether" in Table 1 ) 1.25ml is prepared as a suspension; in a 300ml reaction kettle that has been repeatedly replaced by high-purity nitrogen, 10ml of toluene and 90ml of titanium tetrachloride are added, and the temperature is raised to 80°C, and then the prepared suspension is added to the kettle at a constant temperature of 1 After hours, continue to raise the temperature to 110°C, keep the temperature constant for 2 hours, and then filter the liquid clean. Then add a mixed solution of 120ml of toluene and 30ml of titanium tetrachloride and heat it up to 110°C and stir for 1 hour. After 3 times of treatment, the liquid is filtered off, and the solid obtained ...

Embodiment 3

[0060] Except in the preparation (1) of the catalyst component, the 2,3-diisopropyl-2-dicyanosuccinate obtained in Example 1 (abbreviated as "JS" in Table 1) and 2 -Isopropyl-2-(3-methylbutyl)-1,3-dimethoxypropane (referred to as "2#ether" in Table 1) was added in addition to 1.9ml and 0.6ml respectively , Others are the same as in Example 2.

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Abstract

The invention relates to a solid catalyst component and a catalyst for olefinic polymerization. The solid catalyst component uses dialkoxy magnesium as a carrier and toluene as a dispersant to be contacted with at least one 2,3-di-non-linear chain alkyl-2-cyanosuccinic acid dibasic acid ester type compound and a 2-isopropyl-2-(3-methyl-butyl)-1,3-dimethoxypropane compound to react with titanium halide, and then the reaction product is processed by the titanium halide to obtain the solid catalyst component. The polymerization activity of the catalyst is high, the molecule weight distribution of the obtained polymer is wide, the bulk density is high, the hydrogen response and the stereospecificity expression are good, the grain shape is good, the fine powder content is less and the catalyst is suitable for developing the polyolefine grade.

Description

Technical field [0001] The invention relates to a solid catalyst component and a catalyst for olefin polymerization, belonging to the field of olefin polymerization. Background technique [0002] In the field of olefin polymerization, Ziegler-Natta catalysts composed of titanium compounds and organoaluminum compounds are generally used to polymerize olefin polymers. For example, CN85100997A, CN1453298A and other patents described in the preparation of polypropylene use solid catalyst components mainly composed of titanium, magnesium, chlorine and internal electron donor compounds and organoaluminum compounds as co-catalyst components and as solid catalyst components. The structure orientation enhancer is a catalyst of the organosilicon external electron donor compound to obtain a propylene polymer. At present, the research of catalysts is mainly focused on the following aspects: improving the polymerization activity of the catalyst, improving the stereo-orientation of polyolefin...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/654C08F4/651C08F4/649C08F4/02
Inventor 徐秀东谢伦嘉谭忠田宇严立安冯再兴周奇龙赵思源李凤奎孙竹芳于金华尹珊珊宋维玮
Owner CHINA PETROLEUM & CHEM CORP
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