US 12,246,996 B2
Recycling reduced-carbon materials
J. Dustin Hultine, Milwaukie, OR (US); and Robert Kurt Graupner, Hillsboro, OR (US)
Assigned to THG, LLC, Milwaukie, OR (US)
Filed by THG, LLC, Milwaukie, OR (US)
Filed on Dec. 8, 2023, as Appl. No. 18/533,794.
Claims priority of provisional application 63/386,807, filed on Dec. 9, 2022.
Prior Publication US 2024/0190784 A1, Jun. 13, 2024
Int. Cl. C05C 9/00 (2006.01); C05B 11/06 (2006.01); C05C 3/00 (2006.01)
CPC C05C 9/00 (2013.01) [C05B 11/06 (2013.01); C05C 3/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An energy-releasing process for making fertilizer by consumption of a charable, reduced carbon source, the process comprising:
combining the carbon source with calcium oxide or magnesium oxide to form a feedstock for high-temperature processing;
heating the feedstock in a furnace to yield an effluent gas comprising carbon monoxide and entraining a calcium carbide or magnesium carbide;
subjecting the carbon monoxide to water-gas shift conditions to yield hydrogen and carbon dioxide;
introducing nitrogen into the calcium carbide or magnesium carbide, to yield calcium cyanamide or magnesium cyanamide, and elemental carbon;
exposing the calcium cyanamide or magnesium cyanamide, and the elemental carbon to carbonic acid to yield a cyanamide compound, calcium carbonate or magnesium carbonate, and the elemental carbon;
passing the carbon dioxide through the calcium carbonate or magnesium carbonate, and the elemental carbon to recover the calcium oxide or magnesium oxide, and yield additional carbon monoxide; and
subjecting the additional carbon monoxide to water-gas shift conditions to yield additional hydrogen and additional carbon dioxide.