Cyanamide process

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Cyanamide process is a process of manufacturing fertilizer calcium cyanamide and ammonia. The reaction runs at high temperatures 1000 - 1100 °C often with catalyst in mixture of nitrogen and calcium carbide, which form calcium cyanamide and carbon:

CaC2 + N2 → CaCN2 + C

Further produced calcium cyanamide gives together with water steam calcium carbonate and ammonia:

CaCN2 + 3 H2O → CaCO3 + 2 NH3

The second phase of this process can proceed also in soil. Then the produced ammonia is oxidized to nitrate and used by plants.

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