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公开(公告)号：US10072099B2
公开(公告)日：2018-09-11
申请号：US14905258
申请日：2014-07-15
CPC分类号： C08B15/08 , C07G1/00 , C08H8/00 , C12P19/02 , C12P19/14 , C12P2201/00 , C13K1/02 , D21C3/003 , D21C3/20
摘要： The present invention is directed at a process for fractionating lignocellulosic biomass for the purpose of reducing processing costs, increasing delignification, reducing side-reactions, in particular reducing hemicelluloses degradation, improving cellulose hydrolysis and increasing the nativity of the obtained lignin, by performing organosolv fractionation of the biomass with a treatment liquid at a temperature below 170° C., wherein the treatment liquid comprises a non-hydroxylic organic solvent, in particular a ketone, water and some acid, and optionally subjecting the cellulose-enriched product stream to enzymatic hydrolysis.
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公开(公告)号：US11492753B2
公开(公告)日：2022-11-08
申请号：US14768073
申请日：2014-02-17
IPC分类号： D21C3/20 , C12P19/02 , C13K1/02 , C07G1/00 , C13K13/00 , D21C3/00 , C08H8/00 , C08B37/00 , C08H7/00
摘要： Lignocellulosic biomass can be fractionated for the purpose of increasing cellulose purity in the pulp, increasing native lignin content of the isolated lignin, and improving cellulose hydrolysis, by performing the steps of: (a) extracting the biomass with an extracting liquid comprising at least 20 wt % of a first organic solvent at a temperature below 100° C.; (b) treating the extracted biomass with a treatment liquid comprising a second organic solvent selected from lower alcohols, ethers and ketones, optionally water and optionally an acid, at a temperature between 120° C. and 280° C., and, optionally: (c) subjecting a cellulose-enriched product stream resulting from step (b) to enzymatic hydrolysis. The first and second organic solvent may be different or the same; in particular they comprise ethanol or acetone.
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公开(公告)号：US10793927B2
公开(公告)日：2020-10-06
申请号：US15550288
申请日：2016-02-16
IPC分类号： C13K13/00 , C08H8/00 , C07G1/00 , C08H7/00 , C08L97/00 , B01D61/02 , B01D71/52 , C13K1/04 , C13K11/00
摘要： The invention relates to an improved process for separating lignin and monomeric sugars from a liquor comprising lignin and monomeric sugars in a solvent mixture of water and at least one organic solvent, which employs membrane filtration techniques such as nanofiltration and selective water removal, preferably by permeation through a membrane which is selective for water molecules. The invention further relates to a modular system for executing the process according to the invention. The process and system according to the invention are particularly suitable to be incorporated with pre-treatment of lignocellulosic biomass, in particular by organosolv fractionation or solvolysis.
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