Integrated synthesis of commodity chemicals from waste plastic
US11180371B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 30, 2020 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Apr 18, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2203/0283
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.