METHOD OF CONTROLLING DRYING OF CYCLOHEXANONE OXIME Russian patent published in 2012 - IPC C07C249/04 C07C251/44 C07D201/04 G05D27/00 

FIELD: chemistry.

SUBSTANCE: method of controlling drying of cyclohexanone oxime from an oximation step, involving further use of a separator with a phase separating device, having pipes for collecting ammonium sulphate and cyclohexanone oxime with collectors, wherein the outlet of the ammonium sulphate collector is connected to the first inlet of the ammonium sulphate collector of the first drying step, and the outlet of the cyclohexanone oxime collector is connected to the inlet of the separator of the first step with a flow sensor and a valve, the first outlet of which is connected to the second inlet of the ammonium sulphate collector of the first step, and the second outlet is connected to the cyclohexanone oxime collector of the first step, which is connected by a pipe to a pump and a vortex mixer to which ammonium sulphate is also fed, with a flow sensor and a valve, hydroxylamine sulphate with a valve and ammonia with a flow sensor and a valve, installed in front of a heat exchanger, after which medium pH and temperature sensors are installed, and the outlet of the vortex mixer is connected to the inlet of the separator of the second drying step with a phase separating device, having pipes for collecting ammonium sulphate and cyclohexanone oxime with collectors; the outlet of the ammonium sulphate collector is connected to the inlet of the ammonium sulphate collector of the second step with a pump, and the outlet of the cyclohexanone oxime collector is connected to the inlet of the cyclohexanone oxime collector of the second step with pressure and temperature sensors, connected to a filter and a pump for feeding cyclohexanone oxime for regrouping; control is carried out by setting flow rate of cyclohexanone oxime for drying, ammonium sulphate into the first and second drying steps, pH of the medium, concentration of residual cyclohexanone in cyclohexanone oxime and valves for feeding cyclohexanone oxime, ammonium sulphate to the first and second drying steps, ammonia and hydroxylaminesulphate are actuated, respectively.

EFFECT: reduced consumption of oleum and ammonia.

3 cl, 1 ex, 1 tbl