process for extracting sugars and / or lignin from solid biomass comprising lignocellulose

摘要

A process for extracting sugars and / or lignin from solid biomass comprising lignocellulose A process for extracting sugars and / or lignin from solid biomass comprising lignocellulose, comprising the steps of: (a) contacting solid biomass comprising lignocellulose with a a pulping solution comprising at least 5 to 95% by weight of acetic acid at a temperature in the range of 80 to 195 168 c, (b) separating the mixture obtained from (a) into a pretreated solid residue and a liquid stream comprising dissolved hemicellulose; (c) contacting the pretreated solid residue with a pulp making solution comprising in the range of 50 to 95 ° (c), (d) separating the mixture obtained in (c) into a solid residue comprising delignified cellulose, and a liquid stream comprising dissolved lignin, (e) optionally precipitating lignin from the liquid stream obtained in step (d).