Intermediate reboiler for a methanol plant

Details Intermediate reboiler for a methanol plant Intermediate reboiler for a methanol plant

C - Chemistry, Metallurgy

07

C

C07C 31/04 (2006.01) B01D 3/14 (2006.01) B01D 3/16 (2006.01) C07C 29/80 (2006.01) C07C 29/84 (2006.01)

Patent

CA 2123143

21 Abstract of the Disclosure A methanol refining column and method using an intermediate reboiler are disclosed. Use of the intermediate reboiler reduces methanol production energy requirements. A side stream at or near a fusel oil take- off point is heated in an intermediate reboiler by a low temperature heating medium (relative to a bottoms reboiler) and returned to the column at or near the fusel oil take-off tray. The take-off tray is operated at 85- 110°C, and 70-90 percent of the reboiler duty is supplied through the intermediate reboiler. The remaining heat load is supplied by a bottoms steam reboiler.

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