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Solid catalyst component for olefin polymerization and catalyst

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization, can solve the problems of insufficient wide molecular weight distribution and poor processability of polypropylene

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 for olefin polymerization and catalyst
  • Solid catalyst component for olefin polymerization and catalyst
  • Solid catalyst component for olefin polymerization and catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0048] 2, the preparation of 3-diisopropyl-2-dicyanodiethyl succinate (referred to as "JS" in Table 1): according to the disclosed embodiment 1 method of International Patent Application No. PCT / CN2010 / 000202 , expand the consumption of reactant and solvent in Example 1 by 10 times, and separate and purify 2,3-diisopropyl-2-dicyanodiethyl diethyl ester crude product with a chromatographic column filled with silica gel, Change to vacuum distillation for separation and purification, and collect 124-127°C fractions under the pressure of 110-120Pa. 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.

[0049] IR (cm -1 ): 2979, 2881, 2246, 1733, 1469, 1394, 1371, 1299.6, 1141.

Embodiment 2

[0051] (1) Preparation of catalyst components

[0052] Choose magnesium alkoxide (d (0.5) is 26.4 μm, Span value is 0.85) 10g and toluene 50ml, the 2,3-diisopropyl-2-dicyano-diethyl succinate prepared by the method of embodiment 1 (abbreviated as "JS" in Table 1) 3.0ml is prepared into a suspension; in a 300ml reaction kettle repeatedly replaced by high-purity nitrogen, add 10ml of toluene and 90ml of titanium tetrachloride, heat up to 80°C, and then prepare Add the suspension into the kettle, keep the temperature constant for 1 hour, continue to heat up to 110°C, keep the temperature constant for 2 hours, and then filter the liquid clean. Then add a mixture of 120ml of toluene and 30ml of titanium tetrachloride and raise the temperature to 110°C and stir it for 1 hour, treat it like this 3 times, filter off the liquid, wash the obtained solid 4 times with 150ml of hexane, filter off the liquid and dry to obtain solid catalyst components.

[0053] (2) Olefin polymerization ...

Embodiment 3

[0057] Except in the preparation (1) of catalyst component, the diethyl 2,3-diisopropyl-2-dicyano succinate (abbreviated as " JS " in Table 1) prepared by the method of Example 1 Except that add-on is changed into 4.5ml, other is with embodiment 2.

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Abstract

The invention relates to a solid catalyst component for olefin polymerization and a catalyst. The solid catalyst component is prepared by the following steps of: contacting magnesium dialkoxyl serving as a carrier and toluene serving as a dispersant with a 2,3-di-non-straight chain alkyl-2-cyanodiethyldiester compound which is taken as an electron donor, has a special structure and is shown as a general formula (I), controlling at a certain temperature for reacting with titanium halide, and performing the titanium halide treatment to obtain the solid catalyst. During polymerization, an organic aluminum compound is taken as a catalyst accelerator, and a compound of organic silicon is taken as a steric directing agent. When the catalyst is applied to propylene polymerization, an obtained polymer has the advantages of wide molecular weight distribution, high stereospecificity, good particle form and low fine powder content, and is suitable for products having high requirements on the processing performance of polymers.

Description

technical field [0001] The invention relates to a solid catalyst component and catalyst for olefin polymerization, belonging to the field of olefin polymerization. Background technique [0002] In the field of olefin polymerization, a Ziegler-Natta catalyst composed of a titanium compound and an organoaluminum compound is generally used to polymerize an olefin polymer. For example, in patents such as CN85100997A and CN1453298A, in the preparation of polypropylene, a solid catalyst component mainly composed of titanium, magnesium, chlorine and an internal electron donor compound and an organoaluminum compound as a cocatalyst component and as a solid catalyst component are used. The catalyst of the organosilicon external electron donor compound of the constitutive directional enhancer is used to obtain the propylene polymer. At present, the research on catalysts mainly focuses on the following aspects: improving the polymerization activity of catalysts, improving the stereosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649C08F4/646
Inventor 徐秀东谢伦嘉谭忠田宇周奇龙冯再兴严立安赵思源于金华孙竹芳李凤奎尹珊珊宋维玮
Owner CHINA PETROLEUM & CHEM CORP
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