Modified sulfuric acid and uses thereof
US12398037B2 · kind B2 · utility
0Cited by
8References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 15, 2024 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Jan 15, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/69
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A one-pot process to separate lignin from a lignocellulosic feedstock, where the process involves the steps of: providing a vessel; providing the lignocellulosic feedstock; providing a composition that includes: an acid; a modifying agent including a compound containing an amine group; and a peroxide; exposing the lignocellulosic feedstock to the composition in the vessel for a period of time sufficient to remove at least 80% of the lignin present in the lignocellulosic feedstock; and, optionally, separating and removing a liquid phase that includes dissolved lignin fragments from a solid phase containing cellulose fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.