Process for fractionating lignocellulosics
US10077283B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2014 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Nov 19, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07G1/00
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A method for the isolation of lignin from a lignocellulosic biomass, comprising providing a lignocellulosic biomass; extracting sugar free lignin from the lignocellulosic biomass by contacting said biomass with an organic aqueous solution comprising water and at least one water miscible organic solvent, either discontinuously or continuously, whereby a biomass-solvent suspension is formed; separating the sugar free lignin solution from the biomass-solvent suspension to obtain a sugar free lignin solution and a cellulosic material enriched with lignin carbohydrate complexes and hemicellulose, and optionally isolating sugar free lignin from the sugar free lignin solution; extracting the lignin carbohydrate complexes from the cellulosic material enriched with lignin carbohydrate complexes and hemicellulose by contacting said cellulosic material with a liquid comprising at least water, whereby treated biomass suspension is formed; separating the lignin carbohydrate complexes solution from said treated biomass suspension to obtain a lignin carbohydrate complexes solution and cellulosic material enriched with hemicellulose, and, optionally isolating lignin carbohydrate complexes from the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.