US 12,331,366 B2
Process for treating lignocellulosic biomass
Sophie Couderc, Rueil-Malmaison (FR); Marc Jacquin, Rueil-Malmaison (FR); and Caroline Aymard, Rueil-Malmaison (FR)
Assigned to IFP Energies nouvelles, Rueil-Malmaison (FR)
Filed by IFP Energies nouvelles, Rueil-Malmaison (FR)
Filed on Mar. 29, 2022, as Appl. No. 17/707,030.
Claims priority of application No. 2103229 (FR), filed on Mar. 30, 2021.
Prior Publication US 2022/0325365 A1, Oct. 13, 2022
Int. Cl. C13B 10/14 (2011.01); C12P 7/10 (2006.01)
CPC C13B 10/14 (2013.01) [C12P 7/10 (2013.01)] 23 Claims
 
1. A process for treating a lignocellulosic biomass comprising:
pretreating the biomass by impregnation with an acidic, basic, or oxidizing aqueous solution, and then subjecting the biomass to steam explosion, to form a pretreated biomass in the form of a solid/liquid mixture, and
extracting free sugars from said pretreated biomass by contacting the pretreated biomass in the form of a solid/liquid mixture with an aqueous-alcoholic extraction solution having an alcohol content of between 15% and 70% by weight, and then subjecting the mixture of pretreated biomass and extraction solution to solid/liquid separation so as to obtain a liquid phase enriched in free sugars, called liquor, and a solid phase depleted in free sugars, called must, wherein extraction is carried out at a temperature of less than or equal to 80° C. and the liquor comprises xylose.