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Dialkoxyl magnesium supported solid catalyst as well as preparation method and application thereof

Active Publication Date: 2013-07-24
RENQIU LIHE TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

USP4,298,718 and USP4,495,338 proposed the use of active magnesium halide as the carrier of Ziegler-Natta catalyst for the first time, and the catalyst formed by the action of the carrier and titanium tetrachloride showed high activity in propylene polymerization, but poor stereospecificity

Method used

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  • Dialkoxyl magnesium supported solid catalyst as well as preparation method and application thereof
  • Dialkoxyl magnesium supported solid catalyst as well as preparation method and application thereof
  • Dialkoxyl magnesium supported solid catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0112] The catalyst preparation method is basically the same as that of Comparative Example 1, except that 3.5g of 9,9-bis(methoxymethyl)fluorene is used instead of dibutyl phthalate to obtain 9.5g of solid powder, which is the solid catalyst component, and the titanium content is analyzed It is 3.02 (wt)%.

[0113] The solid catalyst adopts the polymerization evaluation substantially the same as Comparative Example 1, and the difference is that methylcyclohexyldimethoxysilane (CHMDMS) hexane solution is not added, and the catalyst activity is 62,000 g polypropylene / g catalyst, and the polymer bulk density 0.42g / cm 3 .

Embodiment 2

[0115] The solid catalyst prepared in Example 1 was used to carry out polymerization evaluation, the polymerization conditions were the same as in Comparative Example 1, the catalyst activity was 60,000 g polypropylene / g catalyst, and the polymer bulk density was 0.43g / cm 3 .

Embodiment 3

[0117] The solid catalyst prepared in Example 1 was used to evaluate the polymerization. The polymerization conditions were basically the same as in Comparative Example 1, except that diisopropyldimethoxysilane (DIPDMS) was used to replace methylcyclohexyldimethoxysilane (CHMDMS). ) hexane solution, the catalyst activity is 71,000 g polypropylene / g catalyst, and the polymer bulk density is 0.42 g / cm 3 .

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Abstract

The invention provides a dialkoxyl magnesium supported solid catalyst. The catalyst is prepared by complexing 1, 3-di-ethers into an internal electron donor or complexing 1, 3-di-ethers and esters into internal electron donors by taking a dialkoxyl magnesium compound as the carrier. The invention further provides a method for preparing the solid catalyst and an olefin polymerization catalyst containing the solid catalyst. The dialkoxyl magnesium supported solid catalyst shows high activity through the catalyst obtained by using different 1, 3-di-ethers as well as the complex formulation of 1, 3-di-ethers and esters.

Description

technical field [0001] The invention relates to a solid catalyst system for olefin polymerization, its preparation method and its application in catalyzing olefin polymerization. Specifically, it relates to a method of preparing a dialkoxymagnesium supported solid catalyst by using an ether compound or its complex with a diester as an internal electron donor, thereby obtaining a high-performance polyolefin catalyst. Background technique [0002] The development of high-performance polyolefin resins depends on the continuous improvement of the performance of olefin polymerization catalysts. USP4,298,718 and USP4,495,338 proposed for the first time the use of active magnesium halide as the carrier of Ziegler-Natta catalyst. The catalyst formed by the action of the carrier and titanium tetrachloride showed high activity in propylene polymerization, but poor stereospecificity. Subsequently, researchers have continuously worked hard to improve the performance of the catalyst. ...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/02
Inventor 王志武代金松马庆利
Owner RENQIU LIHE TECH LTD
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