Integrated synthesis of commodity chemicals from waste plastic
OwnerJ. Dustin Hultine, Robert Kurt Graupnerinventors
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Abstract
A process to extract carbon from hydrophobic waste comprises: combining the hydrophobic waste with an oxide of an active metal to form a storable, moisture-resistant feedstock for high-temperature processing; heating the feedstock in a furnace to yield an effluent gas entraining a carbide of the active metal; cooling the effluent gas entraining the carbide of the active metal; 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; and acidically hydrolyzing the cyanamide of the active metal to yield a cyanamide compound and a salt of the active metal.
Claims20
A process to extract carbon from hydrophobic waste, the process comprising:
- blending the hydrophobic waste with an oxide of an active metal to form a storable, moisture-resistant feedstock for subsequent carbide synthesis, the feedstock comprising the hydrophobic waste and the oxide of the active metal in a predetermined ratio;
- heating the feedstock in a furnace to yield an effluent gas entraining a carbide of the active metal;
- cooling the effluent gas entraining the carbide of the active metal;
- 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;
- and
- acidically hydrolyzing the cyanamide of the active metal to yield a cyanamide compound and a salt of the active metal.
A process to extract carbon from hydrophobic waste, the process comprising:
- blending the hydrophobic waste with calcium oxide to form a storable, moisture-resistant feedstock for subsequent carbide synthesis, the feedstock comprising the hydrophobic waste and the calcium oxide in a predetermined ratio;
- heating the feedstock in a furnace to yield an effluent gas entraining calcium carbide;
- cooling the effluent gas entraining the calcium carbide;
- introducing nitrogen into the cooled effluent gas entraining the calcium carbide to yield calcium cyanamide and elemental carbon;
- and
- hydrolyzing the calcium cyanamide with water and carbon dioxide to yield a cyanamide compound and one or more of calcium carbonate and calcium bicarbonate.
Dependencies are inferred from the claim text.