Process for the production of urethanes

US4339592A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Robert Becker · Warsaw, US
• Christian Rasp · Cologne, DE
• Gunter Stammann · Cologne, DE
• Johann Grolig · Leverkusen, DE

Key dates

• Filing date: Feb 26, 1981
• Grant date: Jul 13, 1982
• Expiry date: Feb 26, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/8906
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A urethane is produced by reacting an organic nitro compound with carbon monoxide and an organic compound containing at least one hydroxyl group in the presence of a catalyst and a co-catalyst. This reaction is conducted in the liquid phase at elevated temperature and pressure. The catalyst employed is an element and/or compound of an element from the group of noble metals of the 8th Secondary Group of the Periodic Table. The co-catalyst used is formed from (1) a component taken from the group consisting of iron oxychloride, a mixture of iron compounds containing iron oxychloride and oxide-chloride combinations and (2) metallic iron or an iron alloy in finely divided or high surface form. The oxides which may be used in the oxide-chloride combinations of co-catalyst component (1) are the oxides and/or oxide hydrates of tetravalent tin, trivalent chromium, hexavalent molybdenum, hexavalent tungsten, pentavalent vanadium, divalent iron and trivalent iron. The chlorides which may be used in this oxide-chloride combination are chlorides of the elements of Groups IIIA, IVA, VA and IB to VIIIB of the Periodic Table and/or hydrochlorides of tertiary amines.