Patent ID: 7795473
Filing Date: 2010-09-14
Classification: C07C

Abstract:
1. A method for preparing cycloalkanone, comprising the steps of: (a) oxidizing cycloalkane having 5 to 12 carbon atoms to form a mixture comprising ketone, alcohol and unreacted cycloalkane; (b) adding to the mixture alkali metal hydroxide or alkali metal carbonate to form a mixed solution; (c) separating the mixed solution into a first organic phase solution comprising 25 to 45 wt % of cycloalkanone, 15 to 35 wt % of cycloalkanol, 1 to 20 wt % of water, and 100 to 20000 ppm of alkali metal ions, and a first aqueous phase solution, based on a total weight of the first organic phase solution; (d) extracting the first organic phase solution by water to form a second organic phase solution, comprising 30 to 50 wt % of cycloalkanone, 20 to 40 wt % of cycloalkanol, 1 to 7 wt % of water and less than 80 ppm of the alkali metal ions, based on a total weight of the second organic phase solution, and a second aqueous phase solution having an alkalinity of from 100 to 2000 meq/kg; and (e) distilling the second organic phase solution to separate out the cycloalkanone.