Catalyst system for ethylene polymerization

A catalyst and system technology, applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve the inconvenience of production and operation, the inability to produce high molecular weight polymers, Can not produce ethylene oligomers and other problems, to achieve the effect of simple synthesis
CN101649012AInactive Publication Date: 2010-02-17ZHEJIANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2010-02-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a catalyst system for ethylene polymerization, comprising three components a, b and c. The component a is a pyridine diimine ligand with a structural formula (I) or a structural formula (II); the component b is an acetylacetone salt compound; the component c is an aid catalyst; a mol ratio of the component b to the component a is (0.01-100):1; and a mol ratio of the component c to the component b is (10-10,000):1. The invention also discloses the applications of the catalyst system in the preparation of single-peak distributed polyethylene, double-peak distributed polyethylene, polyethylene with super high molecular weight and an ethylene oligomer by the ethylene polymerization.
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Description

technical field

[0001] The invention relates to the field of olefin polymerization catalysts, in particular to a catalyst system for ethylene polymerization and its application in the preparation of unimodal polyethylene, bimodal polyethylene, ethylene oligomers and ultra-high molecular weight polyethylene. Background technique

[0002] Polyethylene is a very important synthetic plastic. At present, most of the industrial production of polyethylene is a heterogeneous Zieglar-Natta catalyst. It is Zieglar et al. who are studying AlEt 3 Found when catalyzing the oligomerization of ethylene, the main catalyst is an early transition metal complex such as titanium, zirconium, chromium and vanadium, and the co-catalyst is AlEt 3 、Al(iBu) 3 , ZnEt 2 and other alkyl compounds, the carrier is mostly magnesium compounds, such as MgCl 2 , Mg(OH) 2 , Mg(OH)Cl, MgO and other carriers.

[0003] The catalytic system composed of metallocene and methylaluminoxane (MAO) can complete the...

Claims

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