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Reference.org
Frank–Caro process
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<p>The Frank–Caro process, also called cyanamide process, is the <a href="/facts/Nitrogen_fixation/TeLoBpWS">nitrogen fixation</a> reaction of <a href="/facts/Calcium_carbide/4AxCfuLM">calcium carbide</a> with <a href="/facts/Nitrogen_gas/Nf1QpGDz">nitrogen gas</a> in a reactor vessel at about 1,000 °C. The reaction is <a href="/facts/Exothermic/gCuSvpa4">exothermic</a> and self-sustaining once the reaction temperature is reached. Originally the reaction took place in large steel cylinders with an electrical resistance element providing initial heat to start the reaction. Modern production uses rotating ovens. The synthesis produces a solid mixture of <a href="/facts/Calcium_cyanamide/IRcdYh9K">calcium cyanamide</a> (CaCN2), also known as <a href="/facts/Nitrolime/IRcdYh9K">nitrolime</a>, and <a href="/facts/Carbon/ukrgQexo">carbon</a>. </p> CaC2 + N2 → CaCN2 + C