Title: Process for preparing calcium cyanamide from urea
Application Number: 95192041 Application Date: 1995.03.02
Publication Number: 1143938 Publication Date: 1997.02.26
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C01C3/18
Applicant(s) Name: SKW Trostberg AG Address:
Inventor(s) Name: G. Weber;J. Graefe;H. Klima
Attorney & Agent: FAN WEIMIN
Abstract:
    Disclosed is a process for producing calcium cyanamide by reacting urea with an oxygen-containing calcium compound in at least two steps a) in a first step the reaction components are allowed to react under compression and/or while being revolved or by applying them to a hot surface at temperatures of 120 DEG to 500 DEG C until a solid is formed and b) the solid reaction mixture that is formed is subsequently calcined at temperatures of 600 DEG to 900 DEG C. In this process it is possible to obtain high yields and throughputs of calcium cyanamide without requiring a time-consuming processing of the reaction product after the first or second step.
Time: 5