Process for preparing N-methyldialkylamines from secondary dialkylamines and formaldehyde

US6982352B2 · kind B2 · utility

Assignee

• CELANESE CHEMICALS EUROPE GMBH · DE

Inventors

• Peter Lappe · Dinslaken, DE
• Helmut Springer · Dinslaken, DE

Key dates

• Filing date: Mar 19, 2004
• Grant date: Jan 3, 2006
• Expiry date: Apr 20, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/28
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing N-methyldialkyl-amines by reacting secondary dialkylamines with formaldehyde at a temperature of from 100 to 200° C., by using from 1.5 to 3 mol of formaldehyde per mole of secondary dialkylamine and degassing the resulting reaction product, removing the aqueous phase and distilling the organic phase.