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An amphoteric crosslinked polymer catalyst loaded with a noble metal, a preparing method thereof and an alcohol oxidation method

A technology of noble metal catalysts and cross-linked polymers, applied in chemical instruments and methods, preparation of organic compounds, organic compound/hydride/coordination complex catalysts, etc., can solve few problems and achieve broad development space, Adjustable reaction conversion rate and selectivity, the effect of large market application value

Active Publication Date: 2018-01-05
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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  • An amphoteric crosslinked polymer catalyst loaded with a noble metal, a preparing method thereof and an alcohol oxidation method
  • An amphoteric crosslinked polymer catalyst loaded with a noble metal, a preparing method thereof and an alcohol oxidation method
  • An amphoteric crosslinked polymer catalyst loaded with a noble metal, a preparing method thereof and an alcohol oxidation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of Acid-base Amphoteric Crosslinked Polymer Supported Nano Precious Metal Catalyst

[0036] 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).

[0037] 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

[0039] 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 8～11

[0041] 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

An amphoteric crosslinked polymer catalyst loaded with noble metal nanoparticles is disclosed. The catalyst is a composition obtained by subjecting an amphoteric crosslinked polymer and a methanol solution of a noble metal salt to a coordination reaction and then performing reduction utilizing sodium borohydride. The amphoteric crosslinked polymer is a crosslinked copolymer of divinyl benzene, a vinyl heterocyclic type monomer and an acrylic acid type monomer. The catalytic efficiency of the catalyst is high. Any oxidant except oxygen, an inorganic alkali, and other reaction auxiliary agents are not needed. The reaction conversion ratio and selectivity are adjustable. After the reaction is finished, the catalyst can be separated through centrifugation or filtration and reutilized, and therefore the catalyst is environmentally friendly and meets requirements on 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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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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