Preparation method of catalyst component for ethylene polymerization or copolymerization and catalyst thereof

An ethylene polymerization and catalyst technology, applied in the field of catalysts, can solve problems such as not being able to fully meet industrial production, and achieve the effects of less fine powder content and high catalytic activity

Inactive Publication Date: 2013-01-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 in Chinese patent CN1229092A, it still cannot fully meet the needs of industrial production

Method used

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  • Preparation method of catalyst component for ethylene polymerization or copolymerization and catalyst thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of catalyst components: in the reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride, toluene 90ml, epichlorohydrin 2.0ml, tributyl phosphate 6.0ml, ethanol 3.4ml successively, The temperature was raised to 65°C under stirring, and the reaction was carried out at 65°C for 2 hours after the solid was completely dissolved to form a uniform solution. The system was cooled to -8°C, 60ml of titanium tetrachloride was slowly added dropwise, and then 4.7ml of tetrabutoxytitanium was added to react for 0.5 hours. Slowly heat up to 85°C and react for 2 hours. Cool down to 0°C and slowly add 12.5ml of 0.9M dichloroethylaluminum heptane solution dropwise, react for 0.5 hour, then raise the temperature to 35°C for 1 hour. Blow dry with high-purity nitrogen to obtain a solid catalyst component with good fluidity.

[0034] (2) Ethylene polymerization

[0035] A stainless steel reaction kettle with a capacity of 2L is fully replaced by high-p...

Embodiment 2

[0037] (1) The synthesis of catalyst is the same as in Example 1. Just change ethylaluminum dichloride to isobutylaluminum dichloride.

[0038] (2) Ethylene polymerization is with embodiment 1. The aggregation results are shown in Table 1.

Embodiment 3

[0040] (1) The synthesis of catalyst is the same as in Example 1. Just change ethylaluminum dichloride to diethylaluminum chloride.

[0041] (2) Ethylene polymerization is with embodiment 1. The aggregation results are shown in Table 1.

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Abstract

The invention relates to a preparation method of a catalyst component for ethylene polymerization or copolymerization and a catalyst thereof. The method comprises the following steps: (1) at a temperature of 50-90DEG, dissolving magnesium halide in a solvent system containing an organic epoxy compound and an organic phosphorus compound to form a uniform solution; adding an organic alcohol compound during or after the solution formation and leaving them to react for certain time so as to obtain a reaction solution; (2) in the presence of an organic titanium compound and at a temperature of -30DEG C-0DEG C, subjecting the solution and a titanium compound to a contact reaction, or adding the organic titanium compound after the contact reaction of the solution obtained in step (1) and the titanium compound, and raising the temperature of the mixture slowly to 50-120DEG C, leaving solids to precipitate gradually and form particles, after certain period of reaction, removing the unreacted material and the solvent, and conducting washing with an inert diluent so as to obtain a solid component; and (3) suspending the solid component in certain amount of the inert diluent, performing a contact reaction with an organic aluminium compound under a temperature of 0DEG C-50DEG C, and after certain reaction time, removing the inert diluent, thus obtaining the catalyst component. The catalyst provided in the invention has high catalytic activity and good hydrogen response.

Description

technical field [0001] The present invention relates to a method for preparing a catalyst component for ethylene polymerization or copolymerization and a catalyst for the catalyst component. 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 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 olefin polymerization, especially the slurry polymerization of ethylene, it is easy to produce finer polymer particles. This kind of fine powder i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/658C08F4/651C08F4/649C08F4/645
Inventor 杨红旭郭子芳周俊领苟清强李颖王丽莎刘昆
Owner CHINA PETROLEUM & CHEM CORP
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