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Catalyst component for ethylene polymerization, catalyst for ethylene polymerization, and preparation method of catalyst component

A technology of ethylene polymerization and catalyst, applied in the field of catalyst components for ethylene polymerization, to achieve the effects of reduced dosage, increased bulk density, and good hydrogen adjustment sensitivity

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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. Although its hydrogenation sensitivity and copolymerization performance are significantly improved compared with the catalyst in the Chinese patent CN1229092A, it is still difficult to fully meet the requirements of some special materials for industrial production. grade requirements

Method used

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  • Catalyst component for ethylene polymerization, catalyst for ethylene polymerization, and preparation method of catalyst component
  • Catalyst component for ethylene polymerization, catalyst for ethylene polymerization, and preparation method of catalyst component
  • Catalyst component for ethylene polymerization, catalyst for ethylene polymerization, and preparation method of catalyst component

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of catalyst components: In a reactor fully replaced by high-purity nitrogen, 6.0 g of magnesium dichloride, 90 ml of toluene, 9.0 ml of ethanol, and 6.0 ml of epichlorohydrin were sequentially added, and the temperature was raised to 70° C. under stirring. After the solid was completely dissolved to form a homogeneous solution, the reaction was carried out at 70°C for 1 hour. Then the system was cooled to -10°C, 5.0ml of S-butyl chlorothioformate was added, and then 80ml of titanium tetrachloride was slowly added dropwise to react for 1-2 hours. Slowly heat up to 80°C and react for 2 hours. Stop stirring, let stand, wash with toluene twice, wash with hexane four times, 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.

[0029] (2) Ethylene polymerization

[0030] A stainless steel reactor with a volume of 2L, after being fu...

Embodiment 2

[0032] (1) The synthesis of catalyst is the same as in Example 1. The amount of S-butyl thiochloroformate was changed to 4.0ml.

[0033] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0035] (1) The synthesis of the catalyst is the same as in Example 1, except that the amount of S-butyl thiochloroformate is changed to 2.0 ml, and it is added before titanium tetrachloride.

[0036] (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 provides a catalyst component for ethylene polymerization, wherein magnesium halide is dissolved in an alcohol compound and an organic epoxy compound to form a uniform solution, and the obtained uniform solution acts with a titanium compound in the presence of a thioester compound so as to obtain the catalyst component. According to the present invention, the catalyst provides characteristics of high polymerization activity, good hydrogen response, good copolymerization performance, and good bulk density when the catalyst is used for ethylene polymerization at a high temperature; the thioester compound is added so as to improve the particle morphology of the catalyst, and improve the hydrogen response and the copolymerization performance of the catalyst; and the use of a lot of titanium tetrachloride to promote precipitate precipitation and the multiple uses of titanium tetrachloride to treat the precipitate are not required, such that the addition amount of titanium tetrachloride is substantially reduced so as to improve the production efficiency and the production benefits of the catalyst.

Description

technical field [0001] The present invention relates to a catalyst for olefin polymerization, in particular to a catalyst component for ethylene polymerization, a catalyst and a preparation method of the catalyst. Background technique [0002] As we all know, catalyst systems containing Ti / Mg composites play a dominant role in the industrial production of polyethylene, and the research focuses on the catalyst's polymerization activity, hydrogen sensitivity, copolymerization performance, and catalyst particle morphology and particle size distribution. In the slurry polymerization process of ethylene, in addition to requiring the catalyst to have high catalytic activity, the hydrogen adjustment sensitivity and copolymerization performance of the catalyst are very important. It can be said that in the slurry polymerization process of ethylene, the above-mentioned properties directly determine the fate of a catalyst and have a direct impact on its industrial application. Especia...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/649C08F4/651C08F4/654
Inventor 苟清强俸艳芸郭子芳周俊领王洪涛杨红旭李颖朱孝恒曹昌文
Owner CHINA PETROLEUM & CHEM CORP
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