process for co-producing hemicellulosic pulp and sugars from biomass; and process for producing hemicellulosic pulp and sugars from biomass

摘要

abstract process for co-producing hemicellulosic pulp and sugars from biomass; and process for producing pulp and hemicellulosic sugars from biomass greenbox + technology is suitable for extracting hemicellulose sugars prior to biomass pulp production in pulp products. The revenue from the sugar stream can significantly improve the economy of a pulp and paper mill. An initial extraction and recovery of sugars is followed by the production of a pulp product with better or similar properties. Other co-products such as acetates and furfural are also possible. Some variations provide a process for co-producing hemicellulosic pulp and sugars from biomass comprising: digesting the biomass in the presence of water vapor and / or hot water to extract hemicellulose in a liquid phase; washing the extracted solids thereby generating a liquid wash filtrate and washed solids; separating the liquid wash filtrate from the washed solids; refining the washed solids to a refining ph of about 4 or more thereby generating pulp; and hydrolyzing hemicellulose to generate hemicellulosic fermentable sugars. 1/1