Process for the distillative separation of mixtures comprising monoethylene glycol and diethylentriamine

US8163139B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Karin Pickenäcker · Lampertheim, DE
• Johann-Peter Melder · Schifferstadt, DE
• Bram Willem Hoffer · Heidelberg, DE
• Thomas Krug · Worms, DE
• Gunther van Cauwenberge · Temse, BE
• Frank-Friedrich Pape · Kleinniedesheim, DE

Key dates

• Filing date: Feb 8, 2007
• Grant date: Apr 24, 2012
• Expiry date: Jul 25, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/86
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Processes comprising: providing a mixture comprising monoethylene glycol and diethylenetriamine; and subjecting the mixture to extractive distillation with a diethylenetriamine-selective solvent comprising triethylene glycol to provide a first stream comprising monoethylene glycol and a second stream comprising diethylenetriamine; wherein the first stream is substantially free of diethylenetriamine, and wherein the second stream is substantially free of monoethylene glycol.