Method for the production of cyclohexanone

Abstract

The invention relates to a method for the preparation of cyclohexanone from cyclohexane. The invention relates more particularly to a method for the production of cyclohexane whose impurity content enables cyclohexanone to be used as a raw material for the production of e-caprolactam. The inventive method consists in treating the mixture of cyclohexanol / cyclohexanone arising from oxidation of cyclohexane by oxygen in a dehydrogenation stage in order to transform cyclohexanol into cyclohexanone and the impurities present such as cyclopentenal. The inventive method makes it possible to obtain highly pure cyclohexanone which is compatible when used as a raw material in the synthesis of e-caprolactam.

Description

technical field

[0001] The present invention relates to a process for the preparation of cyclohexanone using cyclohexane.

[0002] More specifically, the present invention relates to a process for producing cyclohexanone having an impurity content capable of using cyclohexanone as a raw material for the production of ε-caprolactam. Background technique

[0003] In fact, polyamide 6 or polycaprolactam is the main thermoplastic material for the production of filaments, fibers and various molded parts. This polymer is obtained by polymerization of ε-caprolactam.

[0004] This compound can be obtained by different methods. Wherein, adopt more a kind of method to be to produce cyclohexanone oxime by cyclohexanone.

[0005] In this process, the cyclohexanone should be of high purity in order to avoid troublesome impurities especially during the caprolactam polymerization step, which would also modify the properties of the polyamide obtained, especially the coloring of the polya...

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