Production of cyclohexanone

Details Production of cyclohexanone Production of cyclohexanone

1977-05-04

1978-05-30

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

568754, 568749, C07C 3738, C07C 4500

Patent

active

040923606

ABSTRACT:
In production of cyclohexanone by hydrogenating phenol in the presence of a hydrogenation catalyst, improved catalyst life and improved hydrogenation rate are obtained if ketone impurities, particularly hydroxyacetone, are removed from the phenol prior to the hydrogenation. The present invention provides an improved method for reducing the ketone impurities in the phenol by contacting the phenol with a polyethylenimine and distilling the mixture formed to separate the phenol. The invention is particularly useful in production of cyclohexanone from phenol obtained by decomposition of cumene hydroperoxide.

REFERENCES:
patent: 3187050 (1965-06-01), Duggan et al.
patent: 3692845 (1972-09-01), Cheema et al.
patent: 3959382 (1976-05-01), Yeh et al.
patent: 3965187 (1976-06-01), Little et al.

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