A kind of catalyst component and catalyst for ethylene polymerization

A technology of ethylene polymerization and catalyst, which is applied in the field of olefin polymerization, can solve the problems that cannot fully meet the needs of industrial production, and achieve the effects of reducing the amount of addition, improving the sensitivity of hydrogen adjustment, and increasing the bulk density

Inactive Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the prepared catalyst component is used for ethylene polymerization, the catalytic activity of the catalyst is relatively high, and although its hydrogenation sensitivity is much higher than that of the catalyst component in Chinese patent CN1229092A, it still cannot fully meet the needs of industrial production

Method used

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  • A kind of catalyst component and catalyst for ethylene polymerization
  • A kind of catalyst component and catalyst for ethylene polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of catalyst components: In a reactor fully replaced by high-purity nitrogen, 6.0 g of magnesium dichloride, 90 ml of toluene, 5.0 ml of epichlorohydrin, 9.0 ml of tributyl phosphate, 4-chloro- 3.0ml of 1-butanol and 3.0ml of ethanol were heated to 70°C under stirring, and reacted at 70°C for 1 hour after the solid was completely dissolved to form a uniform solution. Then the system was cooled to -10°C, 60ml of titanium tetrachloride was slowly added dropwise, and then 5.0ml of ethyl orthosilicate was added to react for 1 hour. Slowly heat up to 80°C and react for 2 hours. Stop stirring, let it stand, the suspension will quickly separate into layers, remove the upper clear layer, wash twice with toluene, wash four times with hexane, and blow dry with high-purity nitrogen to obtain a solid catalyst component with good fluidity and narrow particle size distribution. The catalyst composition is shown in Table 1.

[0030] (2) Ethylene polymerization

[003...

Embodiment 2

[0033] (1) The synthesis of the catalyst was the same as in Example 1. The amount of 4-chloro-1-butanol was changed to 2.0ml, and the amount of ethanol was changed from 3.0ml to 4.0ml.

[0034] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0036] (1) The synthesis of the catalyst was the same as in Example 1. The amount of 4-chloro-1-butanol was changed to 4.0ml.

[0037] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

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Abstract

The present invention is a catalyst component for ethylene polymerization, which is formed by dissolving magnesium halide in organic epoxy compounds and organic phosphorus compounds to form a uniform solution, adding halogenated alcohols and alcohols, and in the presence of organosilicon compounds without active hydrogen in the precipitation aid Under the role of titanium compounds obtained. Due to the addition of halohydrin compounds, the catalyst exhibits higher polymerization activity, better hydrogen adjustment sensitivity and better bulk density when used in ethylene polymerization. And adopt the organosilicon compound without active hydrogen as precipitation aid, help to improve the activity of catalyst and the improvement of the particle form of catalyst, the catalyst particle form of preparation is better; Do not need to use a large amount of titanium tetrachloride to promote precipitation Precipitation and repeated use of titanium tetrachloride to deal with the precipitate resulted in a significant reduction in the amount of titanium tetrachloride added.

Description

technical field [0001] The invention relates to a catalyst component for ethylene polymerization, a preparation method, a catalyst composed of the catalyst component and its application in ethylene polymerization, belonging to the field of olefin polymerization. technical background [0002] As we all know, the catalyst system containing Ti / Mg composite plays a dominant role in the industrial production of polyethylene, and the research focus is on the catalyst's polymerization activity, hydrogen sensitivity, copolymerization performance, catalyst particle shape and particle size distribution, etc. In the slurry polymerization process of ethylene, in addition to requiring the catalyst to have high catalytic activity, the hydrogenation sensitivity of the catalyst is very important. It can be said that in the slurry polymerization process of ethylene, the level of hydrogen modulation sensitivity directly determines the performance of the catalyst, which has a direct impact on ...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/645C08F2/14
Inventor 苟清强郭子方周俊领王洪涛张韬毅杨红旭徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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