Process for the production of calcium cyanamide from urea
AssigneeSKW Trostberg Aktiengesellschaft
InventorsGunter Weber, Jurgen Graefe, Hubertus Klima, Johann Wolferstetter
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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.degree. to 500.degree. C. until a solid is formed and b) the solid reaction mixture that is formed is subsequently calcined at temperatures of 600.degree. to 900.degree. 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.
Claims21
A process for the production of calcium cyanamide by reacting as reaction components urea with an oxygen-containing calcium compound while heating wherein the reaction is carried out in two steps comprising:
- a) in a first reaction step, reacting the components under compression and/or while being revolved or by applying them to a hot surface which is kept moving at a temperature of from 120.degree. to 500.degree. C. until a solid is formed;
- and
- b) in the second step, calcining the formed solid at a temperature of 600.degree. to 900.degree. C.
Dependencies are inferred from the claim text.