The invention concerns a process for preparing calcium cyanamide by reacting urea with an oxygenous calcium compound in at least two steps: a) in a first step the reaction components are reacted by condensation and/or circulation or by applying them to a hot surface at temperatures of between 120 and 500 DEG C until a solid forms; and b) the resultant solid reaction mixture is then calcined at temperatures of between 600 and 900 DEG C. In this way high yields and charges of calcium cyanamide can be obtained without necessitating complicated reprocessing of the reaction product after the first or second step.
申请公布号
WO9524358(A1)
申请公布日期
1995.09.14
申请号
WO1995EP00771
申请日期
1995.03.02
申请人
SKW TROSTBERG AKTIENGESELLSCHAFT;WEBER, GUENTER;GRAEFE, JUERGEN;KLIMA, HUBERTUS;WOLFERSTETTER, JOHANN
发明人
WEBER, GUENTER;GRAEFE, JUERGEN;KLIMA, HUBERTUS;WOLFERSTETTER, JOHANN