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Metal ruthenium catalyst modified by ionic liquid, magnetic silicon dioxide and its synthesis method and application

A technology of ionic liquid and silicon dioxide, which is applied in the chemical field, can solve the problem of low catalytic activity of the substrate, and achieve the effects of saving ionic liquid solvent, increasing economic benefits, and reducing costs

Inactive Publication Date: 2016-01-13
NORTHWEST A & F UNIV
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Problems solved by technology

[0015] These ionic liquid-modified metal ruthenium catalysts not only need to use a large amount of expensive ionic liquids as solvents in the reaction, but also have low catalytic activity for substrates with large steric hindrance.

Method used

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  • Metal ruthenium catalyst modified by ionic liquid, magnetic silicon dioxide and its synthesis method and application
  • Metal ruthenium catalyst modified by ionic liquid, magnetic silicon dioxide and its synthesis method and application
  • Metal ruthenium catalyst modified by ionic liquid, magnetic silicon dioxide and its synthesis method and application

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preparation example Construction

[0053] The preparation process of this metal ruthenium catalyst is as follows:

[0054]

[0055] The preparation method specifically comprises the following steps:

[0056] 1. Using 2-propenylphenol as the starting material to synthesize catalyst ligands containing ionic liquid chains in the structure:

[0057] (1), add 3.3 grams of 2-propenylphenol and 3.3 grams of methyl 2-bromopropionate to 30 milliliters of anhydrous N,N-dimethylformamide, add 1.5 grams of cesium carbonate to the solution after stirring and dissolving and 4.6 grams of potassium carbonate, under room temperature conditions, continued to stir for 10 hours, then the reaction mixture was poured into 100 milliliters of water and extracted three times with 50 milliliters of ethyl acetate, after the extraction, the combined ethyl acetate layer was washed with sodium chloride solution and washed with After drying over sodium sulfate and concentrating in vacuo, 4.2 g of methyl 2-(2-propenylphenoxy)propionate we...

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Abstract

The invention discloses an ionic liquid modified and magnetic silicon dioxide supported metal ruthenium catalyst and a synthetic method and an application thereof. the synthetic method comprises the following steps: 1, a catalyst ligand containing an ionic liquid chain in the structure is synthesized; 2, the catalyst ligand is implanted to the surface of magnetic silicon dioxide; and 3, the magnetic silicon dioxide and a Grubbs metal ruthenium catalyst react to obtain the ionic liquid modified and magnetic silicon dioxide supported metal ruthenium catalyst. The invention has beneficial effects as follows: by immobilizing the ionic liquid modified Grubbs metal ruthenium catalyst to the surface of silicon dioxide with Fe3O4 magnetical nuclei, the prepared Grubbs metal ruthenium catalyst's catalytic activity is regulated by a two-dimension ionic liquid layer, activity of the catalyst is increased, and the catalyst also has very high activity to a substrate with high steric hindrance. In addition, the catalyst can be separated by magnetic adsorption. Thus, the problem that it is difficult to recycle and reuse a noble metal catalyst and it is hard to separate catalyst residues and products is solved effectively.

Description

technical field [0001] The invention relates to a catalyst and its synthesis method and application, in particular to a metal ruthenium catalyst modified by ionic liquid and supported by magnetic silica, its synthesis method and application, and belongs to the field of chemical technology. Background technique [0002] When ionic liquid-modified Grubbs metal ruthenium catalyst catalyzes olefin metathesis reaction, it has higher activity in ionic liquid than in traditional organic solvent, and the catalyst can be recycled and reused many times. However, this kind of catalyst modified by ionic liquid needs to use a large amount of expensive ionic liquid as a solvent in order to maintain high activity and realize recycling. [0003] Lee et al. linked monolayer-protected gold nanoclusters to ruthenium-carbene catalysts and obtained a catalyst with the following chemical structure: [0004] [0005] Barrett linked a metallic ruthenium-carbene catalyst to polystyrene, resultin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C07B37/00C07B37/10C07D207/48C07C67/333C07C67/343C07C69/74C07C69/618C07C69/78C07C67/293
Inventor 陈淑伟仲崇民章志成麻妙锋郝志明林娥邹继龙
Owner NORTHWEST A & F UNIV
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