Nitrogen-doped mesoporous carbon supported alloy nano-catalyst and application thereof

A nitrogen-doped mesoporous carbon, nano-alloy technology, applied in physical/chemical process catalysts, heterocyclic compound preparation, organic chemistry, etc., can solve the problems of reducing product selectivity, reducing life, etc. Highly selective, highly selective effects

Pending Publication Date: 2022-08-05
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the acidity of the catalyst is too strong, it will catalyze the condensation of furfuryl alcohol at high temperature to form a polymer, which will be attached to the surface of the catalyst, greatly reducing product selectivity, and causing catalyst poisoning to shorten the service life.
Therefore, the direct conversion of furfural to cyclopentanone is very challenging in terms of reaction control and process technology realization.

Method used

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  • Nitrogen-doped mesoporous carbon supported alloy nano-catalyst and application thereof
  • Nitrogen-doped mesoporous carbon supported alloy nano-catalyst and application thereof
  • Nitrogen-doped mesoporous carbon supported alloy nano-catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The present embodiment provides a method for preparing a 2Ni-Co@NMPC catalyst by an impregnation method, and its performance of catalyzing furfural to prepare cyclopentanone is tested, as follows:

[0055] (1) Preparation of catalyst:

[0056] 2.2g of resorcinol, 0.46g of urotropine and 30ml of deionized water were stirred at 40°C for 1 hour, and another 0.42g of melamine, 0.23g of urotropine and 20ml of deionized water were taken and stirred at 80°C until the solution was After clarification, F1270.306g was added until dissolved. After mixing the above two solutions, after reacting at 80 °C for 24 hours, a precipitate formed. After stopping the reaction, the reaction mixture was filtered, and the separated solid was fully washed with ethanol and water, vacuum dried at 80 °C, and the solid was ground and sieved. , to obtain a NMPC precursor with uniform particle size, and the precursor was NMPC in a tube furnace. 2 The NMPC carrier was prepared by annealing at 550 °C ...

Embodiment 2

[0068] The present embodiment provides a method for preparing a 2Ni-Co@NMPC catalyst by an impregnation method, and its performance of catalyzing furfural to prepare cyclopentanone is tested, as follows:

[0069] (1) Preparation of catalyst:

[0070] Follow the steps and conditions of Example 1.

[0071] (2) Catalytic furfural to prepare cyclopentanone

[0072] 0.8g of catalyst prepared above, 5.0g of furfural and 25ml of deionized water were weighed into the autoclave, and N 2 After replacing the autoclave air for 5 times, H 2 Replace the reactor for 2 times, and finally feed 4.5MPa H 2 , seal the reactor. Turn on the autoclave to stir, heat the autoclave until the autoclave temperature reaches 200 °C, stop heating and stirring after 4 hours of reaction, until the autoclave temperature drops to room temperature, open the autoclave valve, and safely discharge the remaining H 2. Add 25 ml of absolute ethanol to the reaction mixture in the autoclave, and after mixing evenl...

Embodiment 3

[0075] The present embodiment provides a method for preparing a 2Ni-Co@NMPC catalyst by an impregnation method, and its performance of catalyzing furfural to prepare cyclopentanone is tested, as follows:

[0076] (1) Preparation of catalyst:

[0077] Follow the steps and conditions of Example 1.

[0078] (2) Catalytic furfural to prepare cyclopentanone

[0079] After experimenting according to the steps and conditions of Example 1, the catalyst and the reaction solution were separated by centrifugation. The catalyst obtained by centrifugation was washed with ethanol for 5 times and then placed in an oven for drying. No other treatment was required. The furfural hydrogenation experiment was carried out at the bottom of the experiment, and the cycle was repeated 5 times. After detection by gas chromatography internal standard method, the conversion rates of furfural were all higher than 90%, and the selectivity of cyclopentanone reached 80%.

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Abstract

The invention belongs to the technical field of catalyst synthesis, and particularly relates to a nitrogen-doped mesoporous carbon supported alloy nano-catalyst and application of the nitrogen-doped mesoporous carbon supported alloy nano-catalyst to preparation of cyclopentanone by catalyzing furfural high-efficiency water-phase hydrogenation. The catalyst is composed of a carrier nitrogen-doped mesoporous carbon and metals M1 and M2 loaded on the nitrogen-doped mesoporous carbon, both the metals M1 and M2 are any one of Cu, Co, Fe, Ni, Al and Zn, the loading capacity in the catalyst is 5-30%, the catalyst is prepared by an impregnation method or an in-situ one-pot method, and the catalyst has a mesoporous structure, a relatively high specific surface area and a good pore structure, and can be used for preparing the catalyst. The catalyst can be recycled for multiple times, the catalytic efficiency is not obviously reduced, the cycle performance is relatively good, and the industrial production requirements are met. The catalyst is safe, non-toxic, green, efficient, environment-friendly and harmless to human bodies, meets industrial green production requirements and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalyst synthesis, and in particular relates to a nitrogen-doped mesoporous carbon-supported alloy nano-catalyst and its application of catalyzing furfural high-efficiency aqueous phase hydrogenation to prepare cyclopentanone. Background technique [0002] Cyclopentanone is an important fine chemical intermediate, which is the raw material for the preparation of new fragrances, such as methyl dihydrojasmonate, brandone, and anxiolytic buspirone. Due to its good solubility in various resins, it is widely used as a solvent in the electronics industry. [0003] The earliest synthetic method of cyclopentanone was discovered by Thorpe and Kon. Using adipic acid as raw material and barium hydroxide as catalyst, cyclopentanone was synthesized by intramolecular decarboxylation ring-closure reaction under high temperature conditions. In the 1970s, the Japanese company Zeon put C 5 A large amount of cyclopentadi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C45/59C07C49/395
CPCB01J27/24C07C45/59C07C2601/08C07C49/395Y02P20/584Y02E60/50
Inventor 冯乙巳舒豪俊蔡智全王紫薇郑成龙
Owner HEFEI UNIV OF TECH
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