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.
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