Production of cyclohexanone

Details Production of cyclohexanone Production of cyclohexanone

1978-06-22

1979-07-24

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

568835, C07C 2700, C07C 2920, C07C 4500

Patent

active

041622677

ABSTRACT:
A controlled process for preparation of cyclohexanone by liquid phase, catalytic hydrogenation of phenol in two or more hydrogenation stages by correlating a predetermined mole ratio of phenol to cyclohexanone with a predetermined maximum temperature in each of the hydrogenation stages, whereby intrinsic safety of operation is achieved by operating at temperatures at or below the atmospheric boiling point in each reactor. The process provided improved control by use of a hydrogenation gas comprising hydrogen and nitrogen and recycling unreacted gas to the reaction zone to promote flashing overhead of product cyclohexanone. At least part of the recycling gas is treated by a cryogenic hydrogen recovery process to remove inerts from the system.

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