Intermediate reboiler for a methanol plant

A methanol refining column (128) and method using an intermediate reboiler (152) are disclosed. Use of the intermediate reboiler reduces methanol production energy requirements. A side stream (144,162) at or near a fusel oil take-off point is heated in an intermediate reboiler (152) by a low tempera...

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Bibliographische Detailangaben
Hauptverfasser:	CIALKOWSKI, EDWARD JAY, OGNISTY, THOMAS PETER
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	A methanol refining column (128) and method using an intermediate reboiler (152) are disclosed. Use of the intermediate reboiler reduces methanol production energy requirements. A side stream (144,162) at or near a fusel oil take-off point is heated in an intermediate reboiler (152) by a low temperature heating medium (relative to a bottoms reboiler) and returned to the column at or near (166) the fusel oil take-off tray. The take-off tray is operated at 85-110 DEG 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.