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Amphoteric cross-linked polymer supported noble metal catalyst and preparation and alcohol oxidation method

A precious metal catalyst, cross-linked polymer technology, applied in chemical instruments and methods, preparation of organic compounds, organic compound/hydride/coordination complex catalysts, etc., can solve few problems, achieve easy recovery, catalytic The effect of high efficiency and broad development space

Active Publication Date: 2020-06-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still little research on the preparation and catalytic application of organic polymer-supported nano-noble metal catalysts.

Method used

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  • Amphoteric cross-linked polymer supported noble metal catalyst and preparation and alcohol oxidation method
  • Amphoteric cross-linked polymer supported noble metal catalyst and preparation and alcohol oxidation method
  • Amphoteric cross-linked polymer supported noble metal catalyst and preparation and alcohol oxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of Acid-base Amphoteric Crosslinked Polymer Supported Nano Precious Metal Catalyst

[0037] In a three-necked flask, add divinylbenzene (DVB) (2.0g, 15mmol), vinylimidazole (VI) (0.483g, 5mmol), acrylic acid (AA) (0.360g, 5mmol), azobisisobutyronitrile (0.07g) and ethyl acetate (30ml), nitrogen protection. React at 100°C for 24 hours without stirring, and dry the solvent after the reaction to obtain 2.5 g of white powder, which is a copolymer of divinylbenzene, vinylimidazole and acrylic acid (PDVB-VI-AA).

[0038] Dip 200 mg of the above white powder into AuCl 3 (20mg) in methanol solution (10mL), vigorously stirred for 16h, centrifuged, washed with methanol, put into a methanol solution (10mL) of sodium borohydride (20mg), stirred vigorously for 6h, centrifuged, washed with methanol to obtain nitrogenous acid and base A nano-gold catalyst supported by a sexually cross-linked polymer, with a gold loading of 2.6%, and a particle size of 3.5±1.0nm...

Embodiment 2～7

[0040] Adopt the method of embodiment 1 to prepare acid-base amphoteric cross-linked polymer loaded nano-precious metal catalyst, the difference is to change the molar ratio of DVB and VI and AA and the consumption of gold trichloride when synthesizing PDVB-VI, see Table 1:

Embodiment 8～9

[0042] The method of Example 1 was used to prepare the acid-base amphoteric cross-linked polymer loaded nano-precious metal catalyst, the difference was to change the type of nitrogen-containing vinyl heterocyclic monomer in the synthesized cross-linked polymer, see Table 2:

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Abstract

The invention discloses an acid-base amphoteric cross-linked polymer-loaded noble metal nanoparticle catalyst, which is a complex obtained by reducing the acid-base amphoteric cross-linked polymer with a noble metal salt methanol solution and reducing it with sodium borohydride; the acid-base The amphoteric cross-linked polymer is a cross-linked copolymer of divinylbenzene, vinyl heterocyclic monomers and acrylic monomers. The catalyst of the present invention has high catalytic efficiency, does not need any oxidizing agent or inorganic base other than oxygen, and the reaction conversion rate and selectivity can be adjusted. After the reaction, the catalyst can be separated and recycled by centrifugation or filtration, which is green and environmentally friendly. It is more in line with the requirements of sustainable development.

Description

technical field [0001] The invention relates to the technical field of catalyst design, in particular to an acid-base amphoteric cross-linked polymer-supported noble metal nanoparticle catalyst and a preparation method thereof, and an acid-base amphoteric cross-linked polymer-supported noble metal nanoparticle catalyst in the selective oxidation reaction of alcohol Applications. Background technique [0002] The catalytic oxidation of alcohols is an important functional group conversion reaction in organic synthesis. It is widely used in the manufacture of various intermediates and fine chemicals, and is of great significance in both scientific research and chemical production. However, traditional alcohol oxidation reactions require the use of stoichiometric inorganic oxidants while using a large amount of organic solvents. These reagents can effectively oxidize alcohols to target products, but also generate a large number of harmful by-products. Oxygen exists widely in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C07C27/22C07C45/29C07C47/54C07C47/02C07C51/255C07C63/06C07C51/235C07C53/126C07C67/08C07C69/78C07C69/24
Inventor 黄家辉王奂史元元
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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