Preparation method of supported cigarette butt porous carbon material catalyst and application of supported cigarette butt porous carbon material catalyst in nitrocyclohexane hydrogenation reaction

A technology of porous carbon material and nitrocyclohexane, which is applied to the preparation of a supported cigarette butt porous carbon material catalyst, and the application field in the hydrogenation reaction of nitrocyclohexane, can solve the problems of high cost, environmental pollution, flammability and easy flammability. Explosive storage environment and other problems, to achieve the effect of improving conversion rate and reducing cost

Active Publication Date: 2020-08-14
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses an amine borane compound as a reducing agent, which is expensive, inflammable and explosive, and has high requirements on the storage environment, and at the same time causes pollution to the environment
To sum up, the current nitrocyclohexane hydrogenation process has problems such as high catalytic cost and serious environmental pollution, and when non-precious metals are used to directly replace noble metals to reduce costs, the yield will be too low

Method used

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  • Preparation method of supported cigarette butt porous carbon material catalyst and application of supported cigarette butt porous carbon material catalyst in nitrocyclohexane hydrogenation reaction
  • Preparation method of supported cigarette butt porous carbon material catalyst and application of supported cigarette butt porous carbon material catalyst in nitrocyclohexane hydrogenation reaction

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Experimental program
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Effect test

Embodiment 1

[0036]Weigh 10g of used cigarette butts, put them in a beaker, add concentrated nitric acid according to the solid-liquid mass ratio of 1:5, stir and soak at room temperature for 2 hours, remove the ash on the surface of the cigarette butts, and add deionized Water, stirred and soaked at room temperature for 24 hours, and moved into a crystallization kettle, carbonized with high-temperature and high-pressure water at 300°C for 2 hours, after natural cooling, suction-filtered the suspension, washed with distilled water until neutral, and dried at 110°C for 12 hours to obtain Cigarette butt porous carbon material precursors have been used. Weigh 3 g of the porous carbon material precursor of the used cigarette butt and 15 g of potassium hydroxide, place it in a quartz boat, and activate it by roasting in a nitrogen atmosphere. ℃, roasted at 900°C for 3 hours under the protection of nitrogen in the second stage, and then naturally cooled to room temperature under the protection o...

Embodiment 2

[0038] Weigh 0.12g of the 1%Cu-20%Ni / SFC-Alk catalyst obtained in Example 1 and place it in a 50mL lining of a high-temperature reactor, add 0.5g of nitrocyclohexane, 5.2g of ethylenediamine, and put , seal the autoclave, replace the air in the autoclave with hydrogen for 4 times, evacuate the autoclave to a vacuum with a vacuum pump, and then place the autoclave in a heating jacket. After rising to the set reaction temperature of 100°C, hydrogen gas was introduced to pressurize to 0.3MPa, magnetic stirring was started, and the reaction timing started. After reacting for 8 hours, the reaction mixture was filtered, and the content of each substance in the filtrate was analyzed by gas chromatography. The conversion rate of nitrocyclohexane was 99.36%, the selectivity of cyclohexanone oxime was 90.66%, and the selectivity of cyclohexylamine was 9.22%.

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Abstract

The invention discloses a preparation method of a supported cigarette butt porous carbon material catalyst and application of the supported cigarette butt porous carbon material catalyst in nitrocyclohexane hydrogenation reaction. The method comprises the following steps: carrying out water carbonization treatment on polluted waste cigarette butts, activating with sylvite to prepare a porous carbon material, carrying out active metal loading by using the porous carbon material as a carrier, and applying the obtained supported cigarette butt porous carbon material catalyst to nitrocyclohexane hydrogenation reaction. The porous carbon material is prepared by taking the harmful waste cigarette butts as a raw material and is used as the catalyst carrier, so that reasonable conversion and application of low-economic-value polluted wastes are realized, and metal with hydrogenation catalytic activity is used as an active component to prepare the supported cigarette butt porous carbon materialcatalyst. The obtained catalyst is used in nitrocyclohexane hydrogenation reaction, the conversion rate of nitrocyclohexane and the selectivity of cyclohexanone-oxime can be improved under the relatively mild reaction condition, and therefore high-quality cyclohexanone-oxime can be produced through the waste resource recycling type catalyst.

Description

technical field [0001] The invention relates to the preparation of a porous carbon material of cigarette butts, in particular to a preparation method of a supported porous carbon material catalyst of cigarette butts and its application in hydrogenation reaction of nitrocyclohexane. Background technique [0002] The hydrogenation of nitrocyclohexane mainly produces cyclohexanone oxime, and cyclohexanone oxime synthesizes caprolactam. Caprolactam is one of the important organic chemical raw materials, and is mainly used to synthesize nylon-6 fiber and nylon-6 engineering plastics. Due to its excellent thermal stability, high mechanical strength, chemical corrosion resistance and processability, caprolactam has a wide range of applications, mainly in the fields of automobiles, medical equipment, ships, electronic appliances, and daily necessities. From a global perspective, the consumption fields of caprolactam mainly include three categories: fibers (civilian silk, industrial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/10B01J37/08B01J37/02B01J37/18C07C249/10C07C251/44C07C209/34C07C211/35
CPCB01J23/755B01J37/10B01J37/08B01J37/084B01J37/0201B01J37/18C07C249/10C07C209/34C07C2601/14C07C251/44C07C211/35Y02P20/584
Inventor 刘平乐姚方勃吕扬郝芳熊伟相福壮罗和安
Owner XIANGTAN UNIV
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