Distillation: processes – separatory – Plural distillations performed on same material – Distillation of initial distillate
Patent
1986-08-18
1988-05-17
Bashore, S. Leon
Distillation: processes, separatory
Plural distillations performed on same material
Distillation of initial distillate
203 83, 203 84, 203 85, 203 99, 203DIG13, 203DIG19, 203DIG23, 568913, B01D 334
Patent
active
047448695
ABSTRACT:
A process for purifying methanol which comprises introducing crude synthetic methanol obtained by catalytic reaction of carbon oxide and hydrogen into a rectifying column either as such or after it is first introduced into a topping column and distilled with or without the addition of water to remove low-boiling components from the top of the topping column, and distilling it in the rectifying column to withdraw purified methanol from the top of the column and mainly water from the bottom of the column; wherein an auxiliary distillation column is provided side by side with the rectifying column, and the rectifying column and the auxiliary distillation column are operated under particular conditions.
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Hirata et al., "Energy-Saving Distillation Technique", Chemical Engineering, vol. 41, No. 9, pp. 454-477 (1977).
Hashimoto Osamu
Saito Yoshihiko
Bashore S. Leon
Manoharan V.
Mitsubishi Gas Chemical Company Inc.
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