Magnesium single-carrier in-situ supported non-metallocene catalyst and preparation method and application thereof

A non-metallocene and non-metallocene ligand technology, applied in the field of non-metallocene catalysts, can solve the problems of affecting the final catalyst activity, restricting the use of polymers, and low olefin polymerization activity, so as to achieve the improvement of catalytic activity and polymer bulk density , significant copolymerization effect and low amount of co-catalyst

Pending Publication Date: 2020-04-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The common problem of the supported non-metallocene catalysts in the prior art is that the olefin polymerization activity is low, and in order to improve its activity, it is necessary to assist a higher amount of cocatalyst
Moreover, in the prior art, due to the use of silica gel and the like as a load carrier, the ash content in the polymer obtained by polymerization is relatively

Method used

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  • Magnesium single-carrier in-situ supported non-metallocene catalyst and preparation method and application thereof
  • Magnesium single-carrier in-situ supported non-metallocene catalyst and preparation method and application thereof
  • Magnesium single-carrier in-situ supported non-metallocene catalyst and preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0030] The invention relates to a preparation method of a magnesium single carrier in-situ supported non-metallocene catalyst, comprising the following steps:

[0031] Dissolving the magnesium compound and the non-metallocene ligand in tetrahydrofuran to obtain a magnesium compound solution; drying the magnesium compound solution, or adding a precipitating agent to the magnesium compound solution and drying the resulting solid product to obtain a modified carrier step, wherein the tetrahydrofuran content in the modified carrier is 0.10-0.50wt%; and the modified carrier is treated with a chemical treatment agent selected from group IV B metal compounds to obtain the magnesium single carrier in situ loaded amphocene Metal catalyst steps.

[0032] According to the invention, no alcohol is used in said step of obtaining the magnesium compound solution.

[0033] The steps for obtaining the magnesium compound solution are specifically described below.

[0034] According to this proc...

Example Embodiment

[0226] Example 1

[0227] Weigh 2.5g magnesium compound anhydrous magnesium chloride (MgCl 2 ), add a certain amount of tetrahydrofuran, heat to 60 ° C to dissolve, add a certain amount of non-metallocene ligands, continue stirring at 60 ° C to dissolve completely, and obtain a magnesium compound solution. After stirring for 2 hours, add a precipitant hexane to make it precipitate , filtered, and the solid product was collected, washed twice with hexane, and the amount of hexane added each time was the same as that added before, and the obtained solid product was dried at 45 °C and an absolute pressure of 10 mBar for 6 h, and then at 80 °C and Drying under a vacuum of 10 mBar for 8 hours obtained a modified carrier, wherein the tetrahydrofuran content was 0.17 wt%.

[0228] Measure 25ml of hexane solvent, join in the modified carrier, add titanium tetrachloride (TiCl) dropwise in 15 minutes under stirring condition 4 ) the hexane solution of the chemical treatment agent, aft...

Example Embodiment

[0232] Example 2

[0233] Basically the same as Example 1, but with the following changes:

[0234] Without using a precipitating agent, the magnesium compound solution was dried at 35° C. and an absolute pressure of 10 mBar under vacuum for 10 h, and then at 90° C. and an absolute pressure of 10 mBar under vacuum for 6 h to obtain a modified carrier, wherein the tetrahydrofuran content was 0.13 wt%.

[0235] This catalyst is designated CAT-2.

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Abstract

The invention relates to a magnesium single-carrier in-situ supported non-metallocene catalyst, and a preparation method and an application thereof. The preparation method of the magnesium single-carrier in-situ supported non-metallocene catalyst comprises the following steps: dissolving a magnesium compound and a non-metallocene ligand in tetrahydrofuran to obtain a magnesium compound solution; drying the magnesium compound solution, or adding a precipitant to the magnesium compound solution and drying the obtained solid product to obtain a modified carrier, wherein the content of tetrahydrofuran in the modified carrier is 0.10-0.50 wt%; and treating the modified carrier with a chemical treatment agent selected from group IVB metal compounds to obtain the magnesium single-carrier in-situsupported non-metallocene catalyst. The magnesium single-carrier in-situ supported non-metallocene catalyst has the characteristics of simple and feasible preparation method, flexible and adjustable polymerization activity and the like.

Description

technical field [0001] The present invention relates to a non-metallocene catalyst. Specifically, the present invention relates to a magnesium single support in-situ supported non-metallocene catalyst, its preparation method and its application in olefin homopolymerization / copolymerization. Background technique [0002] The non-metallocene catalysts that appeared in the middle and late 1990s are also called post-metallocene catalysts. The central atoms of the main catalyst include almost all transition metal elements, and the structure does not contain cyclopentadiene (cene) and its derivatives. (indene or fluorene, etc.), the coordination atoms are oxygen, nitrogen, sulfur, phosphorus, etc., which are characterized by the strong electrophilicity of the central ion, and the cis-alkyl or halogen metal center structure, which is easy for olefin insertion and The σ-bond is transferred, and the central metal is easily alkylated, which is beneficial to the generation of the cati...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F10/02C08F4/02C08F4/645
CPCC08F10/00C08F10/02C08F4/02C08F4/6455Y02P20/52
Inventor 李传峰任鸿平汪文睿汪开秀
Owner CHINA PETROLEUM & CHEM CORP
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