Process for the production of cyanamide

US5166432A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Jens Weitkamp · Horb am Neckar, DE
• Stefan Ernst · Stuttgart, DE
• Heinrich Rock · Trostberg, DE
• Kurt Scheinost · Trostberg, DE
• Benedikt Hammer · Trostberg, DE
• Werner Goll · Garching bei München, DE
• Horst Michaud · Trostberg, DE

Key dates

• Filing date: Aug 20, 1991
• Grant date: Nov 24, 1992
• Expiry date: Aug 20, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J29/85
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention provides a process for the production of cyanamide from urea and/or decomposition products thereof at an elevated temperature with the use of a microporous catalyst, wherein, as catalyst, there is used a zeolite and/or a silicoalumophosphate which is doped with transition metal cations selected from the Group IB and VIIB of the Periodic System. In this way, it is possible to increase the conversion, referred to urea, to 60 to 100%, the selectivity with regard to cyanamide thereby being from about 30 to 50% and with regard to the undesired melamine being .ltoreq.2%.