Modified sulfuric acid and uses thereof
US11905171B2 · kind B2 · utility
0Cited by
0References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2021 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Aug 20, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An aqueous composition comprising: sulfuric acid; a modifying agent comprising an amine group; and a peroxide. The amine group can include triethanolamine, diethanolamine, monoethanolamine, pyrrolidine, ethylenediamine, diethylamine, triethylamine, DIPEA, cyclohexylamine, piperidine, morpholine, DBU, benzylamine, and combinations thereof. The composition is capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place. The composition can be used in processing and depolymerization of cellulose from a plant source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.