Process for the production of urethanes

US4593116A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gunter Stammann · Cologne, DE
• Johann Grolig · Leverkusen, DE
• Robert Becker · Warsaw, US
• Helmut Waldmann · Leverkusen, DE

Key dates

• Filing date: Jun 13, 1984
• Grant date: Jun 3, 1986
• Expiry date: Jun 13, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C269/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Urethanes are made by reacting an organic nitro compound with an organic compound containing at least one hydroxyl group in the presence of carbon monoxide, hydrogen and a catalyst system. The carbon monoxide and hydrogen are used in quantities such that the molar ratio of CO to H.sub.2 is from 0.3:1 to 3:1. The catalyst system is made up of at least one noble metal or compound of a noble metal from Group VIIIB of the Periodic System of Elements, at least one organic nitrogen base and a co-catalyst combination of iron or copper oxidic or hydroxidic compound and a chloride compound. The product urethanes are useful in the production of isocyanates and pesticides.