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Process for high selective catalytic oxidizing of ethylbenzene to produce acetophenone

A catalytic oxidation, high selectivity technology, applied in the direction of oxidative preparation of carbonyl compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., to achieve good catalytic activity, environmental friendliness and high selectivity Effect

Inactive Publication Date: 2018-04-06
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no public documents and patent applications about this process at home and abroad.

Method used

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  • Process for high selective catalytic oxidizing of ethylbenzene to produce acetophenone
  • Process for high selective catalytic oxidizing of ethylbenzene to produce acetophenone
  • Process for high selective catalytic oxidizing of ethylbenzene to produce acetophenone

Examples

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Effect test

Embodiment 1

[0022] Disperse 160 mg of cobalt porphyrin in 50 mL of ethanol, ultrasonicate for 30 min, then add 200 mg of carbon black previously treated with 1 mol / L HCl for 5 h, then reflux and stir at 90 ° C for 5 h, cool to room temperature, and transfer to a rotary evaporator In addition to the ethanol solvent, the obtained solid was dried in a vacuum oven at 80°C for 12 hours, then ground into powder, and then placed in a tube furnace and roasted at 600°C, 700°C, and 800°C for 2 hours in a nitrogen atmosphere. The final sample is abbreviated as Co-N / C-600, Co-N / C-700, Co-N / C-800.

Embodiment 2

[0024] Disperse 160 mg of porphyrin in 50 mL of ethanol, sonicate for 30 min, add 200 mg of carbon black previously treated with 1 mol / L HCl for 5 h, then reflux and stir at 90°C for 5 h, cool to room temperature, and remove ethanol with a rotary evaporator Solvent, the obtained solid was dried in a vacuum oven at 80°C for 12h, then ground into powder, and then placed in a tube furnace and roasted at 700°C for 2h in a nitrogen atmosphere. The final sample was abbreviated as N / C.

Embodiment 3

[0026] Disperse 160 mg of cobalt acetate in 50 mL of ethanol, sonicate for 30 min, add 200 mg of carbon black previously treated with 1 mol / L HCl for 5 h, then reflux and stir at 90 ° C for 5 h, cool to room temperature, and remove with a rotary evaporator Ethanol solvent, the resulting solid was dried in a vacuum oven at 80°C for 12 hours, then ground into powder, and then placed in a tube furnace and roasted at 700°C for 2 hours in a nitrogen atmosphere. The final sample was abbreviated as Co / C.

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Abstract

The invention belongs to the field of fine chemical engineering, and relates to a process for high selective catalytic oxidizing of ethylbenzene to produce acetophenone and provides a process and a concept of catalytically oxidizing ethylbenzene to prepare acetophenone by taking a peroxide as an oxidizing agent and a cobalt metal carbon nitride compound as a catalyst. The process comprises the following steps: roasting carbon black loaded metal cobalt porphyrin in a nitrogen atmosphere to prepare a metal cobalt nitrogen and carbon catalyst; and carrying out highly selective catalytic oxidization on ethylbenzene to prepare acetophenone by taking tert-butyl hydroperoxide as the oxidizing agent and water as a solvent through reaction at a certain temperature. The process has relatively high catalytic activity and good selectivity in catalytically oxidizing ethylbenzene to prepare acetophenone under an organic solvent-free condition. The process is mild in reaction condition, environment-friendly, easy for product quality control and suitable for the fields of selective alkane oxidization reactions and synthesis of medical intermediates and the like.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and in particular relates to the preparation of metal carbon nitrogen catalyst and the process of preparing acetophenone through highly selective catalytic oxidation of ethylbenzene. Background technique [0002] With the rapid development of our country's social economy, more and more attention has been paid to the sustainable development issues involving the environment, energy and resources. In the chemical industry, the activation of carbon-hydrogen bonds is one of the current challenges, among which, the selective oxidation of ethylbenzene to acetophenone is an important carbon-hydrogen bond activation reaction. Acetophenone is a very important chemical raw material and pharmaceutical intermediate. At present, the main producers of acetophenone in the world include Japan, Germany, Italy and Brazil. Although some enterprises in our country are producing acetophenone, the output is limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/28C07C49/78B01J27/24B01J23/75
CPCB01J23/75B01J27/24C07C45/28C07C49/78
Inventor 刘志刚陈远揭山山
Owner HUNAN UNIV
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