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A kind of catalyst component and catalyst for ethylene polymerization

An ethylene polymerization and catalyst technology, applied in the field of olefin polymerization, can solve the problems of troublesome waste liquid treatment, difficult stability control, unsatisfactory bulk density of catalyst system, etc. good effect

Active Publication Date: 2019-05-31
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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  • 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

[0030] (1) Preparation of catalyst components

[0031] In the reactor fully replaced by high-purity nitrogen, 4.5g of magnesium dichloride, 120ml of toluene, 10.0ml of epichlorohydrin, 10.0ml of 2-ethylhexanol, and 3.0ml of ethyl silicate were successively added, and the temperature was raised to 100°C, when the solid is completely dissolved to form a uniform solution, react at 100°C for 3 hours, then add 0.01 g of hydroxypropyl-α-cyclodextrin and continue the reaction for 1 hour. Cool the reaction system to -5°C, slowly add 25ml of titanium tetrachloride dropwise, keep the temperature constant for 0.5 hours, then slowly raise the temperature to 85°C, and react 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 catalyst component with good fluidity.

[0032] (2) Ethylene polymerization

[0033] A stainless steel react...

Embodiment 2

[0035] (1) The synthesis of the catalyst was the same as in Example 1, except that 12.5 ml of epichlorohydrin, 10.0 ml of 2-ethylhexanol, and 0.015 g of hydroxypropyl-α-cyclodextrin were used.

[0036] (2) Ethylene polymerization is with embodiment 1. The aggregation results are shown in Table 1.

Embodiment 3

[0038] (1) Except that the amount of epichlorohydrin is 10.0ml, the amount of 2-ethylhexanol is 5.0ml, the amount of hydroxypropyl-α-cyclodextrin is 0.010g, and the dissolution temperature is increased to 105°C, the synthesis of the catalyst is the same as the implementation example 1.

[0039] (2) Ethylene polymerization is with embodiment 1. The aggregation results are shown in Table 1.

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Abstract

The invention provides a catalyst component used for vinyl polymerization. The catalyst component is prepared by dissolving magnesium halide into a system containing an organic epoxy compound, an organic alcohol compound and an organosilicone compound in the presence of an inert diluent to form a solution, adding cyclodextrin and a derivative of the cyclodextrin to react, and then enabling the reaction product to react with titanic halide or a derivative of the titanic halide. The invention further provides a preparation method of the catalyst component, and a vinyl polymerization catalyst based on the catalyst component. The preparation process of the catalyst component is simple, the activity of the catalyst keeps a relatively high level, the use amount of titanium is small, and the simplifying of the subsequent processing work is facilitated.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization, a preparation method of the catalyst component, an ethylene polymerization catalyst containing the catalyst component, and the application of the catalyst in ethylene polymerization, belonging to olefin polymerization field. 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 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/649
Inventor 李颖郭子芳周俊领苟清强俸艳芸曹昌文杨红旭朱孝恒徐世媛黄廷杰
Owner CHINA PETROLEUM & CHEM CORP