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Preparation and application of supported nitrogen-rich carbon-based solid base catalyst

A solid base catalyst, nitrogen-rich carbon-based technology, applied in physical/chemical process catalysts, preparation of sugar derivatives, organic chemistry, etc., can solve the problem of low accessibility of catalytic reaction sites, etc. and fructose yields, increased accessibility, and improved adsorption

Pending Publication Date: 2020-05-08
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention, it is necessary to provide a kind of preparation method of loaded type nitrogen-rich carbon-based solid base catalyst, the catalyst prepared by this method can overcome catalytic activity group in catalytic glucose isomerization process and can reach catalytic reaction site low rate problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh polyacrylonitrile, chitosan and nano-magnesia and mix them in a mass ratio of 1:1:0.02, put the mixture into a vertical QM-1SP4 planetary ball mill, add stainless steel balls, and the ball mill speed is 200r / min, The mass ratio of balls to materials is 20:1, the volume of the ball milling tank is 500mL, and the ball milling time is 6h. After the ball milling, the mixed powder is obtained, and the mixed powder is stored in a desiccator at room temperature for later use;

[0023] Take 5g of the mixed powder prepared above, put it into a box-type atmosphere furnace, and then exhaust it under nitrogen atmosphere for 10min, then calcinate at 200°C for 1h under nitrogen protection, and then keep the nitrogen atmosphere at a rate of 10°C / min to raise the temperature to 400°C, continue heating at this temperature for 6h, then cool to room temperature and store the product-supported nitrogen-rich carbon-based solid base catalyst in a desiccator.

[0024] Add 50 mg of gluco...

Embodiment 2

[0026] Weigh polyacrylonitrile, chitosan and nano-magnesia and mix them in a mass ratio of 1:0.5:0.05, put the mixture into a vertical QM-1SP4 planetary ball mill, add stainless steel balls, and the ball mill speed is 300r / min, The mass ratio of balls to materials is 20:1, the volume of the ball milling tank is 500mL, and the ball milling time is 6h. After the ball milling, the mixed powder is obtained, and the mixed powder is stored in a desiccator at room temperature for later use;

[0027] Take 5g of the mixed powder prepared above, put it into a box-type atmosphere furnace, and then exhaust it under nitrogen atmosphere for 10min, then calcinate at 200°C for 1h under nitrogen protection, and then keep the nitrogen atmosphere at a rate of 10°C / min to raise the temperature to 500°C, continue heating at this temperature for 6h, then cool to room temperature and store the product-supported nitrogen-rich carbon-based solid base catalyst in a desiccator.

[0028] Add 50 mg of glu...

Embodiment 3

[0030] Weigh polyacrylonitrile, chitosan and nano-magnesium oxide and mix them in a mass ratio of 1:0.1:0.05, put the mixture into a vertical QM-1SP4 planetary ball mill, add stainless steel balls, and the ball mill speed is 400r / min, The mass ratio of balls to materials is 20:1, the volume of the ball milling tank is 500mL, and the ball milling time is 6h. After the ball milling, the mixed powder is obtained, and the mixed powder is stored in a desiccator at room temperature for later use;

[0031] Take 5g of the mixed powder prepared above, put it into a box-type atmosphere furnace, and then exhaust it under nitrogen atmosphere for 10min, then calcinate at 200°C for 1h under nitrogen protection, and then keep the nitrogen atmosphere at a rate of 10°C / min to raise the temperature to 450°C, continue heating at this temperature for 6h, then cool to room temperature and store the product-supported nitrogen-rich carbon-based solid base catalyst in a desiccator.

[0032] Add 50 mg...

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Abstract

The invention discloses a preparation method and application of a supported nitrogen-rich carbon-based solid base catalyst. The method comprises the following steps: (1) mixing polyacrylonitrile, chitosan and nano magnesium oxide; putting the mixture into a QM-1SP4 type planetary high-energy ball mill; adding stainless steel grinding balls, carrying out ball milling for 6 h, and after ball millingis finished, obtaining mixed powder; storing the mixed powder in a dryer at room temperature for later use; (2) taking the mixed powder prepared in the step (1), putting into a box-type atmosphere furnace, calcining for 1 h at the temperature of 200 DEG C under the protection of nitrogen, keeping the nitrogen atmosphere and heating at the speed of 10 DEG C / min, raising the temperature to 400 to 500 DEG C, keeping the temperature at 400-500 DEG C and continuously heating for 6 h, cooling to room temperature and storing the product supported nitrogen-rich carbon-based solid base catalyst in thedryer. The preparation method disclosed by the invention is simple, and the obtained solid base catalyst is high in activity, high in catalytic conversion rate, high in selectivity, easy to recover and free of corrosion to equipment, and is an environment-friendly solid base catalyst.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to the preparation and application of a supported nitrogen-rich carbon-based solid base catalyst. Background technique [0002] The reaction of glucose isomerization to fructose is an important reaction in the process of biomass utilization. Both glucose and fructose as isomers can be converted into important platform compounds 5-hydroxymethylfurfural and levulinic acid. Compared with glucose , fructose can be converted into the above-mentioned platform chemicals without the presence of a catalyst, while the conversion process of glucose requires a large amount of catalyst to occur under high temperature conditions, and the final conversion rate, yield and selectivity are not ideal. The source of glucose Widely, it is the basic structural unit of a large amount of biomass, and it is a cheaper and easier-to-obtain raw material than fructose. Therefore, the efficient isomerization o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07H3/02C07H1/00
CPCB01J27/24C07H3/02C07H1/00
Inventor 胡双岚黄俊生孟飞黄东婷黎鹏汤静洁
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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