Process for the production of guanidine nitrate from urea and ammonium nitrate

US5041662A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Clemens Grambow · Seebruck, DE
• Wolfgang Kristof · Trostberg, DE
• Peter Reitsamer · Waldkraiburg, DE
• Kurt Scheinost · Trostberg, DE

Key dates

• Filing date: Mar 2, 1990
• Grant date: Aug 20, 1991
• Expiry date: Mar 2, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C277/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides a process for the production of guanidine nitrate by the reaction of urea and excess ammonium nitrate in the presence of a silicon dioxide catalyst at an elevated temperature, wherein the molten reaction mixture containing the dispersed catalyst is passed in a cycle, a branch current of the reaction mixture is continuously separated off by filtration in such a manner that the catalyst remains in circulation and consumed urea and ammonium nitrate are supplemented corresponding to the removal of the product.