Methanol distillation
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For the distillation of methanol and water, is it easier to separate them under pressure or under reduced pressure?
Separation can generally be achieved at normal pressure, without the need for pressurization or depressurization. Moreover, general design principles are also followed: if something can be achieved at normal temperature and pressure, there is no need to apply pressure or increase temperature.
Pressurized. Example: Methanol separator DN2400/48*8440, V=28 M3; design temperature/pressure: 60°C/5.7 MPa. Medium: Methanol synthesis gas. 16MnR
Can’t normal pressure distillation be used? For small quantities, we use atmospheric pressure distillation! ! !
If the processing volume is large, two-effect or three-effect distillation can be considered to save energy consumption.
If two-effect distillation is considered for methanol and water, is it more economical and easier to operate to use a pressurized column and an atmospheric column in a two-effect setup, or an atmospheric column and a reduced-pressure column?