Process for the production of alcohols and/or solvents from lignocellulosic biomass with washing of the solid residue obtained after hydrolysis

US9187770B2 · kind B2 · utility

Assignee

• IFP ENERGIES NOUVELLES · FR

Inventors

• Caroline Aymard · Val-de-Reuil, FR
• Pierre-Antoine Bouillon · Bron, FR
• Stephanie Fleurier · Val-de-Reuil, FR
• Sylvain Louret · Val-de-Reuil, FR
• Larissa PEROTTA · Val-de-Reuil, FR
• Eszter Toth · Val-de-Reuil, FR

Key dates

• Filing date: Mar 5, 2014
• Grant date: Nov 17, 2015
• Expiry date: Mar 5, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E50/10
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

The process for the production of alcohol and/or solvent from a biomass feedstock comprises the stages for pretreatment (P) of the biomass feedstock, for enzymatic hydrolysis (H) of the pretreated substrate, and for fermenting the hydrolyzate (F).To reduce the size of the fermenters, at least a portion of the solid residue contained in the hydrolyzate is extracted (Ex1) in such a way as to obtain a stream of solid residue (9) comprising lignin and a hydrolyzate (8) that is low in solid residue. Then, the stream of solid residue is washed (L) with a liquid stream in such a way as to recover a sugar-enriched liquid stream (15). The sugar-enriched liquid stream (15) is recycled in the enzymatic hydrolysis stage (H) to be able to upgrade the sugars without providing dilution of the streams in the process.