Environmentally friendly process for the hydrogenation of dinitriles

US6376714B1 · kind B1 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Alan Martin Allgeier · Wilmington, US
• Theodore A. Koch · Wilmington, US
• Sourav Kumar Sengupta · Wilmington, US

Key dates

• Filing date: May 31, 2001
• Grant date: Apr 23, 2002
• Expiry date: May 31, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for converting a dinitrile to a diamine and optionally an aminonitrile, in which a Group VIII element catalyst is treated with a modifier either before or during a substantially solvent-free hydrogenation reaction in which the dinitrile is contacted with hydrogen in the presence of the catalyst.