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Method for preparing cyclohexanol and cyclohexanone through cyclohexane oxidation

A technology of cyclohexane and cyclohexanol, which is applied in the direction of oxidation reaction preparation, chemical instruments and methods, and carbon-based compound preparation. It can solve the problems of non-reusable use, high catalyst cost, and harsh use conditions, and achieve reusability. Good, simple catalytic system, easy to separate effect

Inactive Publication Date: 2010-06-23
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these catalytic systems have more or less low catalytic activity and poor selectivity; high catalyst cost, harsh use conditions, and cannot be reused; or use toxic solvents or additives, causing environmental pollution and other problems.

Method used

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  • Method for preparing cyclohexanol and cyclohexanone through cyclohexane oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add cyclohexane 4mL, CoFe 2 o 4 5mg, filled with 1.6MPa O 2 , 145 ° C under magnetic stirring reaction 6h. After the reaction is finished, the catalyst and the reaction solution are separated by simple filtration, so that the catalyst can be recycled. After the reaction solution was diluted with absolute ethanol, it was analyzed qualitatively by HP6890 / 5973 mass spectrometer and quantitatively by Agilent 6820 gas chromatograph. The results obtained: the conversion rate of cyclohexane was 16.2%, and the selectivity of cyclohexanol and cyclohexanone was 92.4%.

Embodiment 2

[0018] Except the catalyst is 5mg CuFe 2 o 4 Except, other conditions are with embodiment 1. The results obtained: the conversion rate of cyclohexane was 13.4%, and the selectivity of cyclohexanol and cyclohexanone was 90.2%.

Embodiment 3

[0020] Except the catalyst is 5mg NiFe 2 o 4 Except, other conditions are with embodiment 1. The results obtained: the conversion rate of cyclohexane was 10.6%, and the selectivity of cyclohexanol and cyclohexanone was 90.3%.

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Abstract

The invention discloses a method for preparing cyclohexanol and cyclohexanone through cyclohexane oxidation catalyzed by molecular oxygen. The invention uses the cyclohexane as a reactant, the oxygen as an oxidant and nanoferrite as a catalyst, and any organic solvent or additive are not added during the reaction process. After the reaction, the separation of the catalyst and the product can be realized through simple filtration, the catalyst can be recycled without any loss of the catalytic activity, the conversion rate is over 12%, and the selectivity of the cyclohexanol and cyclohexanone is over 92%.

Description

technical field [0001] The invention relates to a method for preparing cyclohexanol and cyclohexanone by oxidizing cyclohexane with catalytic molecular oxygen. Background technique [0002] The oxidation products of cyclohexane, cyclohexanol and cyclohexanone, are in great demand as raw materials for the production of adipic acid and caprolactam, which are the raw materials for the production of nylon-6 and nylon-66. At present, more than 95% of cyclohexanone in the world is produced by Dutch Mining Company (DSM) technology. This technology is the most mature industrial technology at present, but the conversion rate of cyclohexane is only 3.5-4.2%, the selectivity is only 76-81%, the production efficiency is low, and a lot of resources are wasted. Therefore, the research on the oxidation of cyclohexane has always been a very challenging research topic in the field of catalysis. The reported catalysts are: V 2 o 5 -TiO 2 , mononuclear bipyridyl copper complexes, metal-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C27/22C07C35/08C07C29/50C07C49/403C07C45/33B01J23/80B01J23/70B01J23/889
CPCY02P20/584
Inventor 夏春谷童金辉
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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