Process for the conversion of a solid material containing hemicellulose, cellulose and lignin
US11365455B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2019 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Mar 23, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for obtaining aqueous hydrolysates from solid material containing hemicellulose, cellulose and lignin, which process comprises hydrolysing at least part of the hemicellulose of the solid material with a first aqueous hydrochloric acid solution at a concentration of 15-40 wt %, yielding a remaining solid material and an aqueous first hydrolysate product solution. The aqueous first hydrolysate is displaced from the remaining solid material with a non-aqueous displacement fluid. Thereafter, at least part of the cellulose of the remaining solid material is hydrolysed with a second aqueous hydrochloric acid solution at a concentration of 40-51 wt %, yielding a residue and an aqueous second hydrolysate product solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.