The present invention relates to systems, methods, and processes for the production of conversion products such as furanic products from biomass such as lignocellulosic materials.

The present invention relates to systems, methods, and processes for the production of conversion products such as furanic products from biomass such as lignocellulosic materials.

The method for purifying oses from hemicellulose originating from lignocellulosic biomass includes eliminating the cellulose matrix and the solid residues and/or the suspended materials from the acid hydrolysate containing oses in order to obtain a clarified hydrolysate, and subjecting the clarified hydrolysate, without adding any basic chemical reagent to increase the pH to at least one step of ultrafiltration and/or to at least one step of nanofiltration, so as to obtain a filtrate containing the majority of the pentoses and a retentate containing the species likely to precipitate under the effect of an increase in the pH. The filtrate is treated by at least one step of electrodialysis so as to recover the acid catalyst from an acid-supplemented solution, and obtain a deacidified filtrate.

The method for purifying oses from hemicellulose originating from lignocellulosic biomass includes eliminating the cellulose matrix and the solid residues and/or the suspended materials from the acid hydrolysate containing oses in order to obtain a clarified hydrolysate, and subjecting the clarified hydrolysate, without adding any basic chemical reagent to increase the pH to at least one step of ultrafiltration and/or to at least one step of nanofiltration, so as to obtain a filtrate containing the majority of the pentoses and a retentate containing the species likely to precipitate under the effect of an increase in the pH. The filtrate is treated by at least one step of electrodialysis so as to recover the acid catalyst from an acid-supplemented solution, and obtain a deacidified filtrate.

The invention relates to a method for separating a mixture in an installation comprising a first system comprising a plurality of chromatography columns, a second system downstream of the first system and a tank fed by an outlet line of the first system and feeding the second system with a continuous stream, the method successively comprising, in a cyclical manner, in a given part of the first system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises the measurement of the purity and/or yield of at least one collected fraction, comprising: the determination of the concentration of at least two species of the mixture to be separated in the fraction collected in the tank; and the determination of the purity and/or yield of at least one species of the fraction collected in the tank.

The invention relates to a method for separating a mixture in an installation comprising a first system comprising a plurality of chromatography columns, a second system downstream of the first system and a tank fed by an outlet line of the first system and feeding the second system with a continuous stream, the method successively comprising, in a cyclical manner, in a given part of the first system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises the measurement of the purity and/or yield of at least one collected fraction, comprising: the determination of the concentration of at least two species of the mixture to be separated in the fraction collected in the tank; and the determination of the purity and/or yield of at least one species of the fraction collected in the tank.

A wood-derived carbohydrate composition is disclosed. The wood-derived carbohydrate composition comprises monomeric C6 sugars and monomeric C5 in a total amount of at least 94 weight-% based on the total dry matter content of the carbohydrate composition, wherein the weight ratio of the monomeric C5 sugars to the monomeric C6 sugars is at most 0.1. Disclosed is also a method for producing a wood-derived carbohydrate composition.

A wood-derived carbohydrate composition is disclosed. The wood-derived carbohydrate composition comprises monomeric C6 sugars and monomeric C5 in a total amount of at least 94 weight-% based on the total dry matter content of the carbohydrate composition, wherein the weight ratio of the monomeric C5 sugars to the monomeric C6 sugars is at most 0.1. Disclosed is also a method for producing a wood-derived carbohydrate composition.

The invention relates to a method for separating a mixture in a system comprising a plurality of chromatography columns, the method successively comprising, in a cyclical manner, in a given part of the system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises measuring the purity and/or yield of a collected fraction, comprising: the determination, in a node of the system, of the histories of at least two variables that are representative of the concentration of at least two species contained in the mixture to be separated using at least one fast online detector; the determination of the concentration of at least two species of the mixture to be separated in the collected fraction based on these histories; and the determination of the purity and/or yield of the collected fraction based on these concentrations.

The invention relates to a method for separating a mixture in a system comprising a plurality of chromatography columns, the method successively comprising, in a cyclical manner, in a given part of the system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises measuring the purity and/or yield of a collected fraction, comprising: the determination, in a node of the system, of the histories of at least two variables that are representative of the concentration of at least two species contained in the mixture to be separated using at least one fast online detector; the determination of the concentration of at least two species of the mixture to be separated in the collected fraction based on these histories; and the determination of the purity and/or yield of the collected fraction based on these concentrations.