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A kind of dinuclear (α-diimide) nickel/palladium olefin catalyst, preparation and application

A technology of olefin catalyst and diimine, which is applied in the field of dual-nuclear nickel/palladium olefin catalyst and its preparation, can solve the problems of single catalyst and single molecular structure, and achieve the effect of diversification of molecular structure.

Active Publication Date: 2021-01-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the molecular structure of the catalyst is single, and the chain structure (such as molecular weight and degree of branching) of polyethylene prepared by catalyzing ethylene polymerization is also relatively single.

Method used

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  • A kind of dinuclear (α-diimide) nickel/palladium olefin catalyst, preparation and application
  • A kind of dinuclear (α-diimide) nickel/palladium olefin catalyst, preparation and application
  • A kind of dinuclear (α-diimide) nickel/palladium olefin catalyst, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Synthesis of Ligand L1

[0046] The chemical structural formula of ligand L1 is as follows:

[0047]

[0048] Under nitrogen atmosphere and 85°C, add 2mmol of acenaphthoquinone into a three-necked flask containing 80mL of acetonitrile, add 15mL of acetic acid after half an hour, stir and dissolve for two hours, then add 2mmol of 4-nitro-2,6-di Cumyl aniline (dissolved in 20 mL of acetonitrile in advance) was added dropwise into the three-necked flask. After 24 hours, stop the reaction, let it stand, cool naturally, and the product precipitates out. The precipitate was washed with 5×50 mL of n-heptane, and then dried under vacuum at 70° C. for 48 hours. The product C1-10.515g was obtained with a yield of 75%.

[0049] Under nitrogen atmosphere and 85°C, add 2mmol of acenaphthylquinone into a three-necked flask containing 80mL of acetonitrile, half an hour later, add 15mL of acetic acid, stir and dissolve for two hours, then add 2mmol of 4-(N,N-dimethyl ) Amino-2,6...

Embodiment 2

[0054] Synthesis of Ligand L2

[0055] The chemical structural formula of ligand L2 is as follows:

[0056]

[0057] Under nitrogen atmosphere and 85°C, add 2mmol 2,3-butanedione into a three-necked flask containing 80mL acetonitrile, add 15mL acetic acid after half an hour, stir and dissolve for two hours, then add 2mmol 4-trifluoroform Base-2,6-diisopropylaniline (dissolved in 20 mL of acetonitrile in advance) was added dropwise into the three-necked flask. After 24 hours, stop the reaction, let it stand, cool naturally, and the product precipitates out. The precipitate was washed with 5×50 mL of n-heptane, and then dried under vacuum at 70° C. for 48 hours. 0.353 g of the product C1-2 was obtained with a yield of 72%.

[0058] Under nitrogen atmosphere and 85°C, 2mmol 2,3-butanedione was added to a three-necked flask filled with 80mL acetonitrile. Half an hour later, 15mL acetic acid was added, stirred and dissolved for two hours, and 2mmol 4-(N, N-dimethyl)amino-2,6...

Embodiment 3

[0063] Synthesis of Ligand L3

[0064] The chemical structural formula of ligand L3 is as follows:

[0065]

[0066] Under nitrogen atmosphere and 85°C, add 2mmol glyoxal into a three-neck flask containing 80mL acetonitrile, add 15mL acetic acid after half an hour, stir and dissolve for two hours, then add 2mmol 4-bromo-2,6-di Cumyl aniline (dissolved in 20 mL of acetonitrile in advance) was added dropwise into the three-necked flask. After 24 hours, stop the reaction, let it stand, cool naturally, and the product precipitates out. The precipitate was washed with 5×50 mL of n-heptane, and then dried under vacuum at 70° C. for 48 hours. The product C1-30.326g was obtained with a yield of 75%.

[0067] Under nitrogen atmosphere and 85°C, add 2mmol glyoxal into a three-necked flask filled with 80mL acetonitrile. After half an hour, add 15mL acetic acid, stir and dissolve for two hours, then add 2mmol 4-(N,N-dimethyl Base) amino-2,6-diisopropylaniline (dissolved in 20 mL of...

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Abstract

The invention relates to the technical field of catalytic polymerization of olefins, and aims at providing a dinuclear (alpha-diimine) nickel / palladium olefin catalyst as well as preparation and application thereof. The chemical structural formula of the catalyst is described in a formula I or a formula II. The molecular structure of the catalyst provided by the invention is more diversified, so that the chain structure of a polymerization product can be adjusted in a wider range; especially for the catalyst with an asymmetric molecular structure, two active centers with different properties exist, and the molecular weights and / or branching degrees of polymers produced by the two active centers are significantly different; therefore, the dinuclear (alpha-diimine) nickel / palladium olefin catalyst can be used for preparing bimodal distribution type polyolefins and other polyolefin materials with novel structures. The formula I and the formula II are described in the description.

Description

technical field [0001] The invention belongs to the technical field of olefin catalytic polymerization, and in particular relates to a binuclear (alpha-diimine) nickel / palladium olefin catalyst and a preparation method and application thereof. Background technique [0002] Polyolefin is a basic material related to the national economy and people's livelihood, and because of its excellent performance, various varieties, easy availability and low price of raw materials, it is widely used in various fields such as industry, agriculture and national defense. The development and application of new catalysts is one of the core driving forces to promote the progress and development of the polyolefin industry, and is the key to controlling the structure and performance of polyolefins. [0003] The (α-diimine) nickel / palladium catalyst can catalyze the polymerization of ethylene to obtain branched polyethylene. Researchers have done a lot of research and improvement on this type of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/02C08F110/14C08F210/16C08F4/70C08F2/34C08F2/38C08F293/00C07F15/00C07C249/02C07C251/20C07C251/08C07C251/04
CPCC07C249/02C07C251/04C07C251/08C07C251/20C07F15/006C08F110/02C08F110/14C08F210/16C08F293/00C08F2410/03C08F4/7006C08F2/34C08F2/38C08F2500/05C08F2500/24
Inventor 傅智盛朱邦傅丹君范志强
Owner ZHEJIANG UNIV
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