Process for the manufacture of diethylenetriamine and higher polyethylenepolyamines

US7053247B2 · kind B2 · utility

Assignee

• AKZO NOBEL N.V. · NL

Inventors

• Johan Lif · Vaxholm, SE
• Kristina Ekenberg · Mönsterås, SE

Key dates

• Filing date: Jul 5, 2002
• Grant date: May 30, 2006
• Expiry date: Jul 5, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the manufacture of diethylenetriamine and higher polyethylenepolyamines by a transamination of ethylenediamine. The transamination is performed at a temperature from 135° C. to 180° C. at a pressure from 5 Mpa to 40 Mpa in the presence of hydrogen and a particulate catalysts containing 26 to 65% by weight of nickel on an oxide carrier. A high conversion degree of ethylenediamine and a high selectivity to form acyclic polyethylenepolyamines, such as diethylenetriamine are obtained by the process. The formation of cyclic amine compounds, e.g. piperazine, is low.