Process for the preparation of solid sodium hydrogen cyanamide

US4714602A · kind A · utility

Inventors

• Helmut Krommer · Trostberg, DE
• Karl-Heinz Neuhauser · Taufkirchen, DE
• Stefan Weiss · Trostberg, DE

Key dates

• Filing date: Jul 16, 1986
• Grant date: Dec 22, 1987
• Expiry date: Jul 16, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01C3/16
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of solid sodium hydrogen cyanamide by reacting cyanamide with sodium hydroxide in aqueous solution, the aqueous solution or suspension containing sodium hydrogen cyanamide being concentrated to dryness with the aid of a drier device which uses heating gases, preferably, a spray drier or atomization drier, and, if appropriate, the product then being dried. A pulverulent product with good flow properties, purity and storage stability is thereby obtained in an industrially simple manner.