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Abstract

An energy-releasing process for making fertilizer by consumption of a charable, reduced carbon source. The process comprises: (a) combining the carbon source with an oxide of an active metal to form a feedstock for high-temperature processing; (b) heating the feedstock in a furnace to yield an effluent gas entraining a carbide of the active metal; (c) cooling the effluent gas entraining the carbide of the active metal; (d) introducing nitrogen into the cooled effluent gas entraining the carbide of the active metal, to yield a cyanamide of the active metal and elemental carbon; (e) acidically hydrolyzing the cyanamide of the active metal to yield a cyanamide compound and a salt of the active metal; and (f) processing the cyanamide compound to yield an N-type fertilizer.

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First Claim