Menetelmä biomassan prosessoimiseksi ja fraktioimiseksi;Förfarande för processering och fraktionering av biomassa

Characteristics of degraded cellulose obtained from steam-exploded wheat straw, Carbohydrate Research, Vol. 340, 2005, 97-106, ALATRISTE-MONDRAGON, F. et al. Chemical and enzymatic sequential pretreatment of oat straw for methane production, Bioresource Technology, Vol. 116, 2012, 372-378 (57) Tiivistelmae - Sammandrag The present invention relates to a method of treating biomass, comprising the steps of: providing a lignocellulosic biomass feedstock; contacting the biomass feedstock in a mixture, which is formed by the biomass, water and an alkaline agent selected from the group of alkali metal carbonates, hydroxides and percarbonates and mixtures thereof, with an oxidizing agent at an elevated temperature; and continuing the contacting of the biomass feedstock with the oxidizing agent until a notable part of the lignin is solubilised, wherein the step of providing the biomass feedstock comprises: contacting a biomass raw-material containing cellulose, hemicellulose and lignin in an aqueous phase with an alkaline agent selected from the group of alkali metal carbonates and hydroxides; continuing the contacting of the biomass with the alkaline agent until a significant portion of the hemicellulose is dissolved in the aqueous phase to provide a modified biomass; recovering the modified biomass; optionally opening the structure of the modified biomass by mechanical treatment; and using the modified biomass as a lignocellulosic biomass feedstock. Treating the biomass provides hemicellulose, lignin and cellulose fractions that have a multitude of applications in the bioeconomy.

Patent family as of 17.12.2021
FI127296 B 20180315 FI20140005934 20141024      
FI20145934 A 20160425 FI20140005934 20141024

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