Processed lignin and process to prepare such
US12168672B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Jun 8, 2020 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Nov 30, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07G1/00
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Processed lignin comprising the elements carbon (C), hydrogen (H) and oxygen (O) in the following amounts: A process to prepare the processed lignin comprising subjecting particles comprising lignin and cellulose and optionally hemicellulose to acidic hydrolysis using hydrochloric acid of at least 35%, subjecting the obtained residue to a high temperature treatment of between 300 and 500° C. under inert gaseous atmosphere to a total CI level of below 0.1% by weight, after drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.