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A Ziegler-Natta catalyst with a dual-functional external electron donor and its application

A technology of an external electron donor and an internal electron donor, which is applied in the preparation and application of α-olefin polymerization catalysts, and achieves the effects of low price, sufficient market supply and simple processing technology.

Active Publication Date: 2020-07-17
YINGKOU XIANGYANG CATALYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a huge "risk" for continuous polymerization processes

Method used

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  • A Ziegler-Natta catalyst with a dual-functional external electron donor and its application
  • A Ziegler-Natta catalyst with a dual-functional external electron donor and its application
  • A Ziegler-Natta catalyst with a dual-functional external electron donor and its application

Examples

Experimental program
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Embodiment

[0051] Take 0.02g of catalyst A component, 1.5ml of cocatalyst triethylaluminum, the first external electron donor C, the second external electron donor D and polymerization temperature control agent B, and design different combinations. The experimental results are as follows Table 1.

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Abstract

Disclosed are an alpha-olefin polymerisation Z-N catalyst, and an application thereof, specifically an industrial production catalyst which consists of (A) a solid catalyst component, (B) a cocatalyst organoaluminium compound and (C) a dual-function external electron donor compound, and is used for alpha-olefin polymerisation or copolymerisation processes. The catalyst component comprises magnesium chloride as a carrier, a transition metal such as titanium and a composite aromatic diacid diester / 1,3-diether as an internal electron donor. One or more organoaluminiums act as a cocatalyst. The dual-function external electron donor is a composite of a composite external electron donor hydrocarbyl meth(eth)oxy silicon and a polymerisation temperature control agent organic acid ester. The Z-N catalyst is used for alpha-olefin polymerisation or copolymerisation reactions, self-controls the polymerisation reaction rate during high-temperature polymerisation, maintains a stable reactor operation, and stabilises polymer performance.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of α-olefin polymerization catalysts, and in particular relates to a bifunctional external electron donor of a Ziegler-Natta (Z-N) catalyst for α-olefin polymerization or copolymerization and its application. Background technique [0002] The Z-N catalyst system has been continuously developed since its inception, and has become the main body of the catalyst system for industrial olefin polymerization. Its development mainly goes through three stages: the progress of carrier preparation process, the development of internal electron donor and the improvement of external electron donor. As an internal electron donor to promote the development of Z-N catalysts, the monobasic esters of the third-generation Z-N catalysts, such as ethyl benzoate and ethyl p-ethoxybenzoate, have developed to dibasic esters, such as the fourth-generation Z-N The comprehensive performance of the cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/649C08F4/646
CPCC08F10/00C08F4/6494C08F4/6465C08F4/646C08F4/649
Inventor 王立才高占先闫磊于丽梅李阳王焕李伟郑国彤董庆新原哲
Owner YINGKOU XIANGYANG CATALYST