Process for the production of calcium cyanamide from urea
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United States of America Patent
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May 19, 1998
Grant Date -
N/A
app pub date -
Sep 11, 1996
filing date -
Mar 11, 1994
priority date (Note) -
Expired
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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.
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