What is the significance of controlling the top temperature of a distillation tower?

2015-11-22View Original

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What is the significance of controlling the top temperature of a distillation tower?

Reply #22015-11-22

The top temperature of the distillation column is an important factor in determining product quality; it essentially represents the boiling point of pure methanol at the operating pressure. In atmospheric pressure distillation, the top temperature is generally controlled at 66–67°C. If the temperature rises while the pressure remains constant, it indicates an increase in the heavy components at the tower top (equipment leakage cannot be ruled out); as a result, the boiling range of the methanol product and its potassium permanganate value may exceed the specified limits. These issues can be addressed during production by appropriately adjusting the vapor volume and reflux ratio.

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