Modified sulfuric acid and uses thereof
US12270151B2 · kind B2 · utility
0Cited by
5References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 17, 2024 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Apr 17, 2044 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/0007
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A one-pot process to separate lignin from a lignocellulosic feedstock includes providing a vessel; providing a lignocellulosic feedstock; providing a composition comprising an acid, a modifying agent comprising a carbonyl-containing nitrogenous base compound, 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, removing a liquid phase comprising dissolved lignin fragments from a solid phase comprising cellulose fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.