Patent ID: 9528164
Filing Date: 2016-12-27
CPC Classification: C12P,C13K

Claim Text:
1. An improved process for the hydrolysis of a pre-treated ligno-cellulosic biomass comprising a solid stream and a liquid stream, said solid stream comprising glucans, xylans and compounds that are not glucans or xylans, said liquid stream comprising xylooligomeres, water and compounds which are not xylooligomers, wherein said process comprises the steps of: a) mixing the solid stream and a first portion of the liquid stream; b) hydrolyzing at least a portion of the glucans in the solid stream to glucose and at least a portion of the xylooligomers in the first portion of the liquid stream to xylose in the presence of a first hydrolysis catalyst to create a first hydrolysis mixture having a first hydrolysis mixture monomeric sugars concentration and a first hydrolysis mixture hydrolysis catalyst concentration, wherein the first hydrolysis mixture has a first hydrolysis mixture catalyst to monomeric sugars ratio which is the ratio of the weight of the hydrolysis catalyst in the first hydrolysis mixture to the total weight of monomeric sugars in the first hydrolysis mixture; and c) removing at least a portion of the monomeric sugars from the first hydrolysis mixture to create: wherein the removal of at least a portion of the monomeric sugars from the first hydrolysis mixture occurs while the hydrolysis of at least a portion of the glucans to glucose is still being conducted, and the first hydrolysis mixture catalyst to monomeric sugars ratio is greater than or equal to the first product stream catalyst to monomeric sugars ratio.