Process for the continuous preparation of 1,2-propylene diamine (1,2-PDA) and dimethyldiethylene triamine (DMDETA)

US11274072B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christian Eidamshaus · Mannheim, DE
• Johann-Peter Melder · Schifferstadt, DE
• Joerg Pastre · Ludwigshafen, DE
• Hans-Juergen Pallasch · Ludwigshafen, DE

Key dates

• Filing date: Nov 19, 2018
• Grant date: Mar 15, 2022
• Expiry date: Feb 21, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C211/14
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the continuous preparation of 1,2-propylenediamine (1,2-PDA) and dimethyldiethylenetriamine (DMDETA) via reaction of monoisopropanolamine (MIPOA) with ammonia in the presence of hydrogen and a supported heterogeneous hydrogenation catalyst (catalyst), wherein the reaction is effected in the liquid phase at an absolute pressure in the range from 60 to 170 bar.