4 results about "Cyclohexanone" patented technology

The present invention discloses a method for preparing cyclohexanone through a cyclohexane liquid-phase oxidation method. According to the method, alcohol ketone from a cyclohexane oxidation reaction sequentially passes through a first rectification tower so as to separate the cyclohexanone product, and passes through a second rectification tower and a third rectification tower so as to separate cyclohexanol, the separated cyclohexanol is added into a dehydrogenation reactor through an alcohol groove to carry out a dehydrogenation reaction, the reaction product from the dehydrogenation reactor sequentially enters a fourth rectification tower so as to separate the component containing the carbon number of less than 6, and enters a fifth rectification tower so as to separate the cyclohexanone product, the tower kettle liquid of the fifth rectification tower is recycled as the feeding material of the second rectification tower, and a light component separation device is arranged after the fifth rectification tower, such that the raw material containing the high light component content is removed in the light component separation device in advance so as to reduce the light component content in the cyclohexanol. The method of the present invention has advantages of simple process, low cost and good light component separation effect.