Reasons for unqualified high oxidation value in the pressurized tower
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Hello everyone. For some time now, in our methanol distillation process, the acidity level in the pressure tower has been high, and the oxidation value also remains below the required standards. We have made many adjustments in the pre-tower as well; currently, the vent temperature is 45 degrees, the amount of vent gas is high, and a large volume of extraction water is being used – yet the problem persists. I would appreciate any additional suggestions you might have
Have there been any changes in distillation during this period? For example, has low-temperature methanol been used to remove methanol? Have there been any changes in the synthetic process conditions? I agree with what was said above – try reducing the amount of alkali solution.
Now the positions of addition and subtraction have been changed; that’s it