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Catalyst components and catalysts for ethylene polymerization

An ethylene polymerization and catalyst technology, applied in the field of catalyst components, can solve the problems of unsatisfactory hydrogen adjustment sensitivity and the like

Active Publication Date: 2011-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen tuning sensitivity of the catalyst systems mentioned above is not satisfactory.

Method used

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  • Catalyst components and catalysts for ethylene polymerization
  • Catalyst components and catalysts for ethylene polymerization
  • Catalyst components and catalysts for ethylene polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Preparation of catalyst components: in the reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride, toluene 50ml, epichlorohydrin 6.0ml, tributyl phosphate 4.0ml, ethanol 5.6ml successively, The temperature was raised to 70° C. under stirring, and the reaction was carried out at 70° C. for 1 hour when the solid was completely dissolved to form a uniform solution. Cool down to 30°C, add 4.8ml of diethylaluminum chloride with a concentration of 2.2M dropwise, and maintain the reaction at 30°C for 1 hour. The system was cooled to -5°C, 40ml of titanium tetrachloride was slowly added dropwise, and then 3.6ml of triethyl borate 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 ...

Embodiment 2

[0053] (1) The synthesis of catalyst is the same as in Example 1. The amount of ethanol was changed from 5.6ml to 6.9ml.

[0054] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0056] (1) The synthesis of catalyst is the same as in Example 2. Only the dosage of diethylaluminum chloride was changed to 3.8ml.

[0057] (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 relates to a catalyst component for ethylene polymerization and the catalyst thereof, wherein the catalyst component comprises a magnesium complex, a titanium compound, an organic alcohol compound and a boron compound. The organoboron compound is selected from at least one of the following structural formula 1, structural formula 2 and structural formula 3. The catalyst of the invention is very suitable for the slurry polymerization process of ethylene, and the catalyst has better hydrogen adjustment sensitivity and higher catalytic activity.

Description

technical field [0001] The invention relates to a catalyst component for ethylene polymerization, a preparation method of the catalyst component and a catalyst thereof. More specifically, it relates to a catalyst component containing an organic boron compound, a preparation method of the catalyst component and a catalyst. 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 core of its research is nothing more than the polymerization activity of the catalyst, the particle shape and particle size distribution of the catalyst, the hydrogen adjustment sensitivity and Copolymerization performance and so on. In the slurry polymerization process of ethylene, in addition to requiring the catalyst to have high catalytic activity, it is very important to control the particle size and particle size distribution of the produced ethylene polymer. In the process of ethyle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/645C08F10/02
Inventor 张韬毅郭子方周俊领杨红旭李瑞霞徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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