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Amine bis phenolate tetradentate ligand IV subgroup metal complex with large special resistance substituent and application thereof

A technology of metal complexes and tetradentate ligands, applied in the field of catalysis, to achieve the effects of long catalytic life, easy availability of raw materials, and high stability

Inactive Publication Date: 2015-09-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other similar structures, methyl groups, tert-butyl groups, and halogen atoms, which are less hindered by the ortho-position of the phenolic hydroxyl group on the aromatic ring, only show high activity for catalyzing the polymerization of hexene, but have not been reported for catalyzing the polymerization of ethylene.

Method used

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  • Amine bis phenolate tetradentate ligand IV subgroup metal complex with large special resistance substituent and application thereof
  • Amine bis phenolate tetradentate ligand IV subgroup metal complex with large special resistance substituent and application thereof
  • Amine bis phenolate tetradentate ligand IV subgroup metal complex with large special resistance substituent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]

[0025] At -78°C, first add 216mg (0.33mmol) of bis(2-hydroxy-3-cumyl-5-tert-butyl)benzyl-(N,N-dimethylethylene) to 20ml of toluene Diamine, then add 0.4ml of 0.825M titanium tetrachloride toluene solution, naturally rise to room temperature, stir overnight, drain the solvent, and vacuum at 140°C for 3 hours to obtain 244.9mg of brick-red metal The titanium complex, yield 96.2%, is recorded as complex C1.

Embodiment 2

[0027]

[0028] At -78°C, first add 258mg (0.33mmol) of bis[2-hydroxy-(2,2-diphenylethyl)-5-tert-butyl]benzyl-(N,N-di Methylethylene) diamine, then add 0.4ml of toluene solution of titanium tetrachloride with a concentration of 0.825M, naturally rise to room temperature, stir overnight, drain the solvent, and vacuum at 140°C for 3h. 283.7 mg of brick-red metal titanium complex can be obtained, with a yield of 95.6%, which is designated as complex C2.

Embodiment 3

[0030]

[0031] At -78°C, first add 299mg (0.33mmol) of bis(2-hydroxy-3-trityl-5-tert-butyl)benzyl-(N,N-dimethylethylene to 20ml of toluene base) diamine, then add 0.4ml of toluene solution of titanium tetrachloride with a concentration of 0.825M, naturally rise to room temperature, stir overnight, drain the solvent, and vacuum at 140°C for 3 hours to obtain 294.3mg brick red The complex of metal titanium, the yield is 87.2%, is recorded as complex C3.

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Abstract

The invention provides an amine bis phenolate tetradentate ligand IV subgroup metal complex with large special resistance substituent and application thereof, and belongs to the technical field of catalysis. The structure expression of the complex is as below. The complex as a main catalyst, and a cocatalyst of a mixture of alkyl aluminum and a boron agent, or alkylaluminoxane constitute a catalytic system for catalysis of polymerization of ethylene. The synthesis method of the complex is simple, and has raw materials and low cost. The complex has easily modifiable structure, and has high catalytic activity, long catalyst life and high stability when it is used as the catalyst for the catalytic polymerization of ethylene.

Description

technical field [0001] The invention belongs to the technical field of catalysis, in particular to an amine bisphenol tetradentate fourth subgroup metal catalyst with large steric hindrance and its application in catalyzing ethylene polymerization. Background technique [0002] At present, polyolefin products are widely used in coatings, packaging, construction, electrical, automotive and electronic industries due to their low price, abundant raw materials, easy mechanical processing, good insulation, corrosion resistance, and excellent comprehensive performance. application, thereby greatly improving the quality of life and living environment of human beings. The industrial development of polyolefins has become an important pillar of a country's national economic development. With the rapid development of my country's economy, the demand for polyolefins is also increasing. The design and synthesis of olefin polymerization catalysts are the key to the development of the enti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/643C08F4/642C08F110/02C07F7/28C07F7/00
Inventor 母瀛何江浩李丰许博宋婷婷
Owner JILIN UNIV
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