Process for the preparation of pure triethylenediamine (TEDA)

US6552194B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ortmund Lang · Quirnbach, DE
• Bernd Rumpf · Hockenheim, DE
• Matthias Frauenkron · Freinsheim, DE
• Dirk Funhoff · Heidelberg, DE
• Thomas Manderbach · Ludwigshafen, DE
• Bernd Stein · San Diego, US

Key dates

• Filing date: Jan 3, 2002
• Grant date: Apr 22, 2003
• Expiry date: Jan 3, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D487/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the preparation of pure triethylenediamine (TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250° C., passing the vapor-form TEDA into a liquid solvent, and subsequently crystallizing the TEDA out of the resultant solution.