Method for the production of cyclohexanone

Details Method for the production of cyclohexanone Method for the production of cyclohexanone

2005-11-30

2009-08-25

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S836000

Reexamination Certificate

active

07579506

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.

REFERENCES:
patent: 4877903 (1989-10-01), Costantini et al.
patent: 4918239 (1990-04-01), Wang et al.
patent: 5168983 (1992-12-01), Tan et al.
patent: 0 450 498 (1991-10-01), None
patent: 1 018 557 (1966-01-01), None
International Search Report corresponding to PCT/FR 2005/002979, issued on Mar. 22, 2006, 4 pages.

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