Recycling reduced-carbon materials
US12246996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2023 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Dec 8, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05C11/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.