System and method for producing refined cyclohexanone
A production method and technology of cyclohexanone, which is applied in the field of production system of refined cyclohexanone, can solve problems such as difficult separation, long process flow of vacuum pumping system, large consumption of steam and circulating water, etc., and achieve the link of eliminating waste water, Effect of reducing circulating water consumption and reducing sewage discharge
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Embodiment 1
[0053] Such as figure 1 As shown, a production system for refining cyclohexanone includes a drying tower, a drying tower reboiler, a drying tower liquid-gas phase heat exchanger, a drying tower gas-phase condenser, an oil-water separator, a recovery water pump, a drying tower kettle pump, a light Tower, light tower reboiler, light tower reflux tank, light tower reflux pump, light tower gas phase condenser, light tower mechanical vacuum pump, light tower gas phase heat recovery device, light tower kettle pump, ketone tower, ketone tower reboiler, Ketone tower gas phase condenser, ketone tower mechanical vacuum pump, ketone tower reflux tank, ketone tower reflux pump, cyclohexanone cooler, ketone tower kettle pump, alcohol tower, alcohol tower kettle pump, alcohol tower reboiler, alcohol tower gas phase condensation device, alcohol tower mechanical vacuum pump, alcohol tower reflux tank and alcohol tower reflux pump;
[0054] The alcohol and ketone solution enters the middle pa...
Embodiment 2
[0056] A kind of production method of refined cyclohexanone, such as figure 1 shown, including the following steps:
[0057] ① The alcohol and ketone solution enters the drying tower after heat exchange through the liquid-gas phase heat exchanger of the drying tower. Under the heating of the reboiler of the drying tower, the gas phase moisture and a small amount of oil phase separated from the top of the drying tower are exchanged for liquid and gas phases through the drying tower Heater cooling, drying tower gas phase condenser condenses, non-condensable gas is vented or torched, the condensate enters the oil-water separator, the oil phase is recovered, the water phase is recovered by the recovery water pump and used as process water, and the bottom liquid of the drying tower is discharged from the drying tower The kettle is pumped out; the temperature at the top of the drying tower is 102-125°C, the temperature at the bottom of the drying tower is 150-170°C, and the pressure...
Embodiment 3
[0062] System equipment is with embodiment 1, and production method is with embodiment 2, and its difference is:
[0063] The temperature at the top of the drying tower is 125°C, the temperature at the bottom of the drying tower is 170°C, and the pressure is 40KPa;
[0064] The reflux production ratio of the light tower is 450:1, and the liquid at the bottom of the light tower is pumped out from the bottom of the light tower; the temperature at the top of the light tower is 135°C, the temperature at the bottom of the light tower is 150°C, and the pressure is -90KPa;
[0065] The reflux recovery ratio of the ketone tower is 4:1, the temperature at the top of the ketone tower is 70°C, the temperature at the bottom of the ketone tower is 105°C, and the pressure is -100KPa;
[0066] The alcohol tower reflux recovery ratio is 2.5:1; the remaining liquid in the alcohol tower tank is pumped out from the alcohol tower tank; the temperature at the top of the alcohol tower is 105°C, the...
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Abstract
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