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Method for catalyzing transfer of hydrogen controllable reduction nitro-compound in formic acid or formate

A technology of nitro compounds and formate, applied in the field of fine chemicals, to achieve the effects of high reaction rate, good cycle, high catalytic conversion rate and selectivity

Inactive Publication Date: 2014-01-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a carbon nitride-supported nano-palladium or polymer semiconductor-supported nano-metal catalytic controllable reduction of unsaturated Organic Compound Method

Method used

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  • Method for catalyzing transfer of hydrogen controllable reduction nitro-compound in formic acid or formate
  • Method for catalyzing transfer of hydrogen controllable reduction nitro-compound in formic acid or formate

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Disperse the semiconductor carbon nitride into deionized water, add an appropriate amount of chloropalladium acid or sodium chloropalladate solution, and soak for a period of time. After adjusting the pH of the chloropalladic acid or sodium chloropalladate solution in which the semiconductor carbon nitride is dispersed with sodium hydroxide solution, adding a reducing agent for reduction, washing, and drying.

[0026] The chemical composition of the carbon nitride-loaded nano-palladium catalyst prepared by the above method in the present invention is: a palladium-carbon nitride catalyst with a palladium mass fraction of 0.1-40%. figure 1 It is the carbon nitride supported nano-palladium catalyst powder X-ray diffraction spectrogram of embodiment 1, illustrates that there are a large amount of metal palladium (111) and (200) crystal faces to exist; figure 2 It is a transmission electron microscope photo of the carbon nitride-supported nano-palladium catalyst catalyst in...

Embodiment 2

[0028] Disperse polymer semiconductors such as nitrogen-doped graphene, polyacetylene, polyacrylonitrile, poly-p-phenylene acetylene, poly-p-phenylene vinylene, and polythiophene into deionized water, and add appropriate amount of chloropalladium acid or sodium chloropalladate After soaking in the solution for a period of time. After adjusting the pH of the chloropalladic acid or sodium chloropalladate solution in which the polymer semiconductor is dispersed with a sodium hydroxide solution, adding a sodium borohydride solution for reduction, washing, and drying.

[0029] The chemical composition of the polymer semiconductor nano-palladium catalyst prepared by the above method in the present invention is: the polymer semiconductor nano-palladium catalyst with a palladium mass fraction of 0.001:99.999 to 40:60.

Embodiment 3

[0031]Disperse the polymer semiconductor described in Example 2 into deionized water, add an appropriate amount of solutions containing gold, silver, iridium, nickel, ruthenium, platinum, or rhodium, and then soak for a period of time. After adjusting the pH of the solution containing gold, silver, iridium, nickel, ruthenium, platinum or rhodium dispersed with semiconductor carbon nitride with sodium hydroxide solution, adding a reducing agent for reduction, washing and drying. The chemical composition of the polymer semiconductor-supported nano-metal catalyst prepared by the above method in the present invention is: polymer semiconductor-supported gold, silver, iridium, nickel, ruthenium, platinum, or rhodium with a mass fraction of 0.001:99.999 to 40:60 catalyst.

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Abstract

The invention relates to a method for catalyzing the transfer of a hydrogen controllable reduction nitro-compound in formic acid or formate. Carbon nitride supported nano palladium or polymer semiconductor supported nano metal is used as a catalyst, the formic acid or formate is used as a hydrogen source, the reaction temperature is 0-15 DEG C, and the transfer of hydrogen in the formic acid or formate to a substrate nitro is efficiently catalyzed so as to selectively generate corresponding amine. Compared with the prior art, the method disclosed by the invention has the advantages that the reaction conditions are mild, the substrate conversion rate and product selectivity are high, the catalyst is easy to recover with good circularity, the system is environment-friendly and low in energy consumption, and the method has a vitally important value in industrial application.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a method for the controllable reduction of unsaturated organic matter by carbon nitride-supported nano-palladium catalyzed transfer of hydrogen in formic acid or formate. Further, the carbon nitride supported nano-palladium catalyst catalyzes a method for selectively generating corresponding amines from compounds such as nitro groups. Background technique [0002] The selective catalytic hydrogenation of nitro compounds to amines is a very important catalytic reaction, which has a wide range of applications in the chemical and pharmaceutical industries. Amines are widely used in the synthesis of pharmaceuticals, dyes, polymers, pesticides, fragrances and surfactants, biomass fuels and other fine chemical products. The direct reduction of nitro compounds is the conventional preparation method. Liquid-phase and gas-phase hydrogenation are two production methods...

Claims

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Application Information

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IPC IPC(8): C07B43/04C07C209/36C07C211/46C07C211/47C07C211/52C07C211/58C07C211/51C07C215/76C07C213/02C07C217/84C07C225/22C07C221/00C07D215/38B01J27/24B01J31/06
CPCY02P20/584
Inventor 李新昊蔡翊宇龚灵红陈接胜
Owner SHANGHAI JIAO TONG UNIV
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