Biomass fractionation process

Details Biomass fractionation process Biomass fractionation process

C - Chemistry, Metallurgy

07

G

260/133, 9/28

C07G 1/00 (2006.01) D21C 9/08 (2006.01)

Patent

CA 1229334

ABSTRACT OF THE DISCLOSURE A process for the delignification of cellulosic materials, wherein a high-yield cellulose pulp and high-value by-products, such as reactive lignins of low molecular weight are produced, which comprises degassing lignocellulosic material, rapidly heating the lignocellulosic material in a liquor comprising water, an organic solvent and a buffer thereby maintaining a substantially neutral solvent extraction, such that said lignocellulosic material is submerged in said liquor at a temperature in the range of 175° to 200°C for a substantially instantaneous period to about one hour at said temperature; and rapidly cooling the mixture to a temperature in the range of 20° to 200°C.

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