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Activated carbon loaded compound metal catalyst, preparation method and application thereof.

A composite metal and catalyst technology, which is applied in the field of activated carbon-supported composite metal catalyst and its preparation, can solve problems in the field of catalytic hydrogenation, and achieve the effects of many application times, shortened reaction time, and high conversion rate

Inactive Publication Date: 2016-12-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the published literature, there are more about nitro reduction catalysts and their catalytic performance, but for the catalytic hydrogenation reduction reaction of nitro containing electron-donating groups on the benzene ring, there is no systematic research report. It has not been possible to achieve rapid, high conversion, and high stability catalytic hydrogenation reduction to synthesize the corresponding amino compound, which has become one of the common technical problems that plague the field of catalytic hydrogenation

Method used

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  • Activated carbon loaded compound metal catalyst, preparation method and application thereof.
  • Activated carbon loaded compound metal catalyst, preparation method and application thereof.
  • Activated carbon loaded compound metal catalyst, preparation method and application thereof.

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] The physical parameters of the carrier activated carbon: the ash content is 3.0wt%, and the specific surface area is 1500m 2 / g, the proportion of micropore specific surface area is not less than 75%, and the particle size of activated carbon is D 10 :2.5μm, D 50 : 12 μm, D 90 : 30 μm; the material of the activated carbon is coconut shell.

[0049] Weigh the palladium chloride corresponding to 0.5g palladium, the platinum dichloride corresponding to 0.3g platinum and 2.5g sodium citrate, add ethylene glycol and stir until completely dissolved; mix 10g gac with 50ml ethylene glycol to prepare Make a slurry, heat up to 50°C and stir for 2 hours, then drop into the ethylene glycol solution of the active component, and stir at a constant temperature for 5 hours; add ferric chloride corresponding to 0.1g of iron and chloride corresponding to 0.2g of zinc For zinc, continue to stir at constant temperature for 5 hours; add dropwise an ethylene glycol solution of sodium hydr...

Embodiment 2

[0051] The physical parameters of the carrier activated carbon: the ash content is 4.0wt%, and the specific surface area is 1200m 2 / g, the proportion of micropore specific surface area is not less than 70%, and the particle size of activated carbon is D 10 : 4.5 μm, D 50 : 15μm, D 90 : 32 μm; the material of the activated carbon is coconut shell.

[0052] Weigh the palladium chloride corresponding to 0.5g palladium, the platinum dichloride corresponding to 0.3g platinum and 3.5g sodium citrate, add ethylene glycol and stir until completely dissolved; mix 10g gac with 40ml ethylene glycol to prepare Form a slurry, heat up to 80°C and stir for 2 hours, then drop into the ethylene glycol solution of the active component, and stir at a constant temperature for 3 hours; add ferric chloride corresponding to 0.1g of iron and chloride corresponding to 0.2g of zinc For zinc, continue to stir at constant temperature for 5 hours; add dropwise an ethylene glycol solution of sodium hyd...

Embodiment 3

[0054] The physical parameters of the carrier activated carbon: the ash content is 3.0wt%, and the specific surface area is 1500m 2 / g, the proportion of micropore specific surface area is not less than 75%, and the particle size of activated carbon is D 10 :2.5μm, D 50 : 12 μm, D 90 : 30 μm; the material of the activated carbon is coconut shell.

[0055] Weigh the palladium chloride corresponding to 0.6g palladium, the platinum dichloride corresponding to 0.2g platinum and 2.5g sodium citrate, add ethylene glycol and stir until completely dissolved; mix 10g gac with 50ml ethylene glycol to prepare Make a slurry, heat up to 50°C and stir for 2 hours, then drop into the ethylene glycol solution of the active component, and stir at a constant temperature for 5 hours; add ferric chloride corresponding to 0.2g of iron and chloride corresponding to 0.3g of zinc Zinc, continue stirring at constant temperature for 5 hours; add dropwise an ethylene glycol solution of sodium hydroxi...

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Abstract

The invention provides an activated carbon loaded compound metal catalyst, a preparation method and application thereof. The catalyst is prepared from a carrier, an active ingredient and an auxiliary, wherein the carrier is activated carbon, the active ingredient is at least one of platinum, palladium and rhodium, and the auxiliary is at least one of iron, zinc, cobalt and copper. The catalyst can be applied to a reaction for synthesizing a corresponding amine compound by catalytic hydrogenation, and has high catalytic activity and high hydrogenation speed, the reduction process is effectively promoted by the using method, and a nitro group influenced by power supply group can be quickly reduced into amino by 100 percent. The catalyst is mild in conditions, good in stability and more in using times in the circular using process.

Description

(1) Technical field [0001] The invention relates to an activated carbon-supported composite metal catalyst and its preparation method and application. The catalyst can be used for catalytic hydrogenation reduction reactions of nitro groups containing electron-donating groups on benzene rings and pyridine rings. (2) Technical background [0002] The reduction of nitro group to amino group is an important basic organic synthesis reaction, which is widely used in the synthesis of fine chemicals such as pigments, dyes, pharmaceuticals, pesticides and rubber additives, resins, and photosensitive materials. The traditional synthetic route usually adopts the chemical reduction method, which uses alkali sulfide, iron powder, etc. to undergo a redox reaction with a nitro group in an acidic medium to form an amino group. The process is easy to operate, the reaction process is stable with little fluctuation, and the reactants are completely converted. However, the reduction products a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/60C07C209/36C07C211/51C07C213/02C07C217/84C07D213/73
CPCB01J23/60B01J23/8913B01J23/8926B01J23/8953C07C209/36C07C213/02C07D213/73C07C211/51C07C217/84Y02P20/584
Inventor 卢春山王梦君张群峰马磊丰枫李小年
Owner ZHEJIANG UNIV OF TECH
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