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

A technology of ethylene polymerization and catalyst, which is applied in the field of ethylene polymerization catalysts. It can solve the problems of unsatisfactory bulk density of the catalyst system, troublesome waste liquid treatment, difficult control of stability, etc., and achieve high bulk density, controllable particle size, The effect of high catalytic activity

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this traditional method is that the particle size and particle size distribution of the catalyst particles are completely controlled by the precipitation process, that is, the recrystallization process of the magnesium carrier component, and its stability is difficult to control
However, the bulk density of the catalyst system prepared by the above two methods is not satisfactory yet.
In addition, although the above-mentioned catalyst system has good performance for olefin polymerization, in order to obtain the catalyst solid product in the preparation process of the above-mentioned catalyst system, the method of adding a precipitation aid is adopted, and a large amount of titanium tetrachloride is used , in the post-processing stage will bring greater trouble to waste liquid treatment

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Preparation of catalyst components

[0050] In the reactor fully replaced by high-purity nitrogen, add 4.0g of magnesium dichloride, 120ml of toluene, 3.0ml of 1-chloro-2-methyl-2-propanol, 10.0ml of ethanol, and 3.0ml of tributyl phosphate, The temperature was raised to 70° C. under stirring, and reacted at 70° C. for 2 hours. After forming a uniform solution, 10.0 ml of epichlorohydrin was added to continue the reaction for 0.5 hours to form a solid precipitate. Cool the reaction system to -15°C, slowly add 25ml of titanium tetrachloride dropwise, keep the temperature constant for 0.5 hours, then add 2.0ml of 2-chloroethyl benzoate and 1.0ml of tetrabutyl titanate, slowly raise the temperature to 85°C, The reaction was carried out at this temperature for 2 hours. Then stop stirring, let it stand, the suspension is quickly separated into layers, the supernatant is extracted, washed four times with hexane, and dried with high-purity nitrogen to obtain a solid catal...

Embodiment 2

[0054] (1) The preparation process of the solid catalyst component is the same as in Example 1, the difference is that 1-chloro-2-methyl-2-propanol is changed to add 1-ethoxyl-2-propanol, and the consumption is 4.5 ml; the dosage of 2-chloroethyl benzoate is 2.5ml.

[0055] (2) Ethylene polymerization is the same as embodiment 1. The aggregation results are shown in Table 1.

Embodiment 3

[0057] (1) The preparation process of the solid catalyst component is the same as Example 1, and the difference is that the 1-chloro-2-methyl-2-propanol consumption is 2.8ml; benzoic acid-2-chloroethyl is changed to benzoic acid -4-Chlorobutyl ester, the dosage is 2.6ml.

[0058] (2) Ethylene polymerization is the same as embodiment 1. The aggregation results are shown in Table 1.

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Abstract

The present invention relates to the technical field of catalysts for ethylene polymerization, and provides a catalyst component for ethylene polymerization, and a preparation method thereof, and a catalyst for ethylene polymerization. The catalyst component comprises the reaction product of the following components: (1) a magnesium compound, (2) an organophosphorus compound, (3) an alcohol compound, (4) an organic epoxy compound, (5) an oxygen-containing organotitanium compound, and (6) a halogenated aromatic ester compound, wherein the halogenated aromatic ester compound has a general formula of R<1>C6H4COO(CH2)nCHmX3-m, R<1> is selected from hydrogen, halogen, C1-C20 alkyl, C1-C20 substituted alkyl, C3-C20 cycloalkyl and C6-C20 aromatic group, X is halogen, n and m are integers, n is more than or equal to 0 and is less than or equal to 10, and m is more than or equal to 0 and is less than 3. According to the present invention, the obtained catalyst component has characteristics of increased particle size and significantly-narrowed particle size distribution, and the obtained polymer has high bulk density and good hydrogen sensitivity.

Description

technical field [0001] The invention relates to the technical field of catalysts for ethylene polymerization, and more specifically, to a catalyst component for ethylene polymerization, a preparation method thereof and a catalyst for ethylene polymerization. Background technique [0002] As we all know, the catalyst system containing Ti / Mg composites plays a dominant role in the industrial production of polyolefins, 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 hydrogenation sensitivity and Copolymerization properties, etc. In the prior art, in order to obtain a catalyst with a uniform particle diameter and a good particle shape, people usually use different magnesium raw materials to prepare the catalyst. [0003] The first method is to dissolve magnesium chloride as a raw material in some solvent to obtain a uniform solution, and then mix the solution wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F4/651C08F4/653
CPCC08F110/02C08F4/651C08F4/653C08F2500/18C08F2500/12
Inventor 李颖郭子芳周俊领苟清强曹昌文杨红旭黄庭俸艳芸
Owner CHINA PETROLEUM & CHEM CORP
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