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Loaded non-metallocene catalyst and preparation method and application thereof

A non-metallocene, supported technology, applied in the field of non-metallocene catalysts, can solve the problems of low catalytic ethylene polymerization activity, limited polymer particle shape, and difficult control of catalyst particle shape, and achieves the effect of simple preparation method

Inactive Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods use a magnesium compound support, and the particle morphology of the catalyst is difficult to control, which limits the particle morphology of the polymer obtained from the polymerization.
[0008] Patents CN200910180100.6 and CN200910180607.1 disclose that in the absence of alcohol, the non-metallocene complex is dissolved in the magnesium compound solution, and then the porous carrier is added, dried directly or filtered, washed and dried, and then treated with IVB chemical treatment agents, thereby The preparation method and polymerization application of the supported non-metallocene catalyst, the non-metallocene complexes are uniformly present in the carrier, but the activity of catalytic ethylene polymerization is low in the examples

Method used

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  • Loaded non-metallocene catalyst and preparation method and application thereof

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preparation example Construction

[0098] The invention relates to a preparation method of a supported non-metallocene catalyst, comprising the following steps: dissolving a magnesium compound in a first solvent in the presence of alcohol to obtain a magnesium compound solution; making a porous carrier and the magnesium compound solution mixing to obtain a first mixed slurry; adding a precipitant to the first mixed slurry or drying the first mixed slurry to obtain a composite carrier; combining the composite carrier with the silicon compound of formula (X) and A step of contacting a chemical treatment agent selected from Group IVB metal compounds to obtain a modified composite carrier; and contacting the non-metallocene complex with the modified composite carrier in the presence of a second solvent to obtain the supported non-metallocene catalyst A step of.

[0099] The magnesium compound will be specifically described below.

[0100] According to the present invention, the term "magnesium compound" refers to ...

Embodiment 1

[0452] Anhydrous magnesium chloride is used as the magnesium compound, tetrahydrofuran is used as the first solvent, ethanol is used as the alcohol, and silica gel is used as the porous carrier, the model is ES757 from Ineos Company. . The silicon compound adopts tetraethoxy silicon, and the IVB chemical treatment agent adopts titanium tetrachloride (TiCl 4 ), the second solvent is dichloromethane, and the non-metallocene complex is compound of.

[0453] Weigh 5 grams of magnesium compound, add it to the first solvent, then add alcohol, completely dissolve at room temperature to obtain a magnesium compound solution, then add a porous carrier, stir for 2 hours to obtain the first mixed slurry, and then evenly heat to 90°C , directly vacuum-dried to obtain a composite carrier.

[0454] Add the prepared composite carrier into the hexane solvent, add the silicon compound dropwise within 10 minutes at room temperature and add the IVB group chemical treatment agent dropwise wit...

Embodiment 2

[0459] Basically the same as Example 1, but with the following changes:

[0460] Before the modified composite carrier is in contact with the non-metallocene complex, it is treated with triethylaluminum as an auxiliary chemical treatment agent to obtain a pretreated composite carrier.

[0461] That is, add the modified composite carrier to the hexane solvent, then slowly add the auxiliary chemical treatment agent triethylaluminum (concentration: 0.88mol / L, hexane solution), stir at 60°C for 2 hours, filter, wash with hexane 3 times, the amount of each time is the same as that of the previously added solvent, and finally vacuum-dried at 60° C. to obtain a pretreated composite carrier. The molar ratio of the composite support in terms of Mg element to the auxiliary chemical treatment agent in terms of Al element is 1:0.2.

[0462] Supported non-metallocene catalysts are designated CAT-2.

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Abstract

The invention relates to a loaded non-metallocene catalyst and a preparation method thereof. The loaded non-metallocene catalyst has the characteristics of high catalytic activity, remarkable copolymerization effect and the like. The invention also relates to an application of the loaded non-metallocene catalyst in olefin homopolymerization / copolymerization; and a prepared olefin homopolymer / copolymer has the characteristics of good particle morphology, narrow molecular weight distribution, reduced contents of oligomers and fine powder and the like.

Description

[0001] This application is based on the ongoing research project of "National Eleventh Five-Year Support Program Topics". The project has been highly valued and strongly supported by the Ministry of Science and Technology of the People's Republic of China. Its goal is to form a new generation of polyolefin catalyst technology with independent intellectual property rights, improve the homogeneity of domestic related products, improve the grade of polyolefin varieties in my country, and promote its development. Development in the direction of diversification, serialization, specialization and high performance. technical field [0002] The present invention relates to a non-metallocene catalyst. Specifically, the present invention relates to a supported non-metallocene catalyst, its preparation method and its application in olefin homopolymerization / copolymerization. Background technique [0003] The non-metallocene catalysts that appeared in the mid-to-late 1990s are also call...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/658C08F4/654C08F4/656C08F4/02
Inventor 李传峰任鸿平易玉明汪文睿郭峰杨爱武
Owner CHINA PETROLEUM & CHEM CORP
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