Solid catalyst component for olefin polymerization, and catalyst thereof

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization, can solve the problems of complex operation and high fine powder content

Active Publication Date: 2012-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the third and fourth methods, in addition to Mg and ROH, other raw materials are required, and the operation is also very complicated. The above methods all have their own shortcomings.
By controlling the bulk density of alkoxymagnesium, the average particle size and other indicators, and controlling the rate from the temperature

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] (1) Preparation of dialkoxymagnesium carrier

[0068] In a 1 L reactor with a stirrer, a reflux condenser, a thermometer and a burette were installed. After sufficiently replacing with nitrogen, 550 ml of ethanol and 10 ml of isopropanol were added to the reactor, and 0.68 g of iodine and 0.42 g of magnesium chloride were added to dissolve them. After stirring, the temperature was raised until reaching the reflux temperature of the reaction system. Then add magnesium powder 32g successively, and introduce toluene 90ml. The reaction was carried out to completion, ie no more hydrogen evolution. It is then washed, separated and dried. The bulk density of the obtained dialkoxymagnesium is 0.40g / cm 3 , the average particle diameter (D50) is 43.0 μm, SPAN=(D90-D10) / D50=(60.8-29.5) / 43.0=0.73.

[0069] (2) Preparation of catalyst components

[0070] Take 10g of the above magnesium alkoxide, 50ml of toluene, 2.0ml of 4-ethyl-3,5-heptanediol dibenzoate and prepare a suspens...

Embodiment 2

[0075] Except that in the preparation of the catalyst component, 4-ethyl-3,5-heptanediol dibenzoate was replaced by 3,5-heptanediol dibenzoate, the others were the same as in Example 1.

Embodiment 3

[0077] Except that in the preparation of the catalyst component, 4-ethyl-3,5-heptanediol dibenzoate was replaced by 2,4-pentanediol dibenzoate, the others were the same as in Example 1.

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Abstract

The present invention relates to a solid catalyst component for olefin polymerization, and a catalyst thereof. According to the solid catalyst component, amorphous spherical dialkoxy magnesium is adopted as a carrier, toluene is adopted as a dispersing agent, the amorphous spherical dialkoxy magnesium contacts titanium halide at a certain temperature, and then reacts with a polyol ester compound with a special structure, wherein the polyol ester compound is adopted as an electron donor; then the resulting material is treated by the titanium halide to obtain the solid catalyst component, during the polymerization process, an organic aluminum compound is adopted as an assistant catalyst, and an silicone compound is adopted as a stereo structure directing agent. According to the present invention, the catalyst has high activity during the polymerization process, and the prepared polymer has characteristics of wide molecular weight distribution, good stereoregularity, good particle morphology and low powder content.

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 obtain an olefin polymer. For example, in patents such as CN85100997A and CN 1453298A, in the preparation of polypropylene, a solid catalyst component mainly composed of titanium, magnesium, chlorine and an electron donor compound and an organoaluminum compound as a co-catalyst component and as a stand-alone catalyst component are used. A catalyst for organosilicon compounds as a stereoregularity-enhancing agent to obtain propylene polymers. At present, the research on catalysts mainly focuses on the following aspects: improving the polymerization activity of catalysts, improving the stereoregularity of polyolefins, improving the hydrogen...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/02C08F10/06
Inventor 谭忠徐秀东严立安周奇龙于金华李凤奎尹珊珊宋维玮王迎任春红
Owner CHINA PETROLEUM & CHEM CORP
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