The present invention relates to a method for effectively utilizing fructose raffinate obtained in the process for separating psicose conversion product with a high purity chromatography in the process for preparing psicose, and more specifically, it is utilized for preparation of fructose-containing raw material solution for preparing psicose by supplying the fructose raffinate obtained in the separation step of psicose preparation into the psicose conversion reaction.

The present invention relates to a method for preparing fructose or xylulose from biomass comprising glucose or xylose, and a method for separating a mixture of glucose and fructose and a mixture of xylose and xylulose.

The present invention relates to a method for preparing fructose or xylulose from biomass comprising glucose or xylose, and a method for separating a mixture of glucose and fructose and a mixture of xylose and xylulose.

Disclosed herein are embodiments of a method for producing furfural from a hemicellulose source material. Also disclosed are embodiments of a system for carrying out the method. In particular embodiments, the method can be carried out without adding an extraneous mineral acid to facilitate pentose production from the hemicellulose source material and thus byproducts produced by the method can be used as animal feed.

A method for treating biomass including lignocellulosic polymers. The biomass is treated in a mixture of water with at least one oxidizing agent and steam at a temperature in a range of from about 130° C. to about 220° C. for a period from about 5 seconds to about 10 hours. The pH of the mixture is periodically measured for substantially an entire duration of the treating step. As necessary, based on the measured pH of the mixture, adjusting the pH of the mixture into a range of from about pH 4.5 to about pH 7.5 by adding a base to the mixture.

A method for treating biomass including lignocellulosic polymers. The biomass is treated in a mixture of water with at least one oxidizing agent and steam at a temperature in a range of from about 130° C. to about 220° C. for a period from about 5 seconds to about 10 hours. The pH of the mixture is periodically measured for substantially an entire duration of the treating step. As necessary, based on the measured pH of the mixture, adjusting the pH of the mixture into a range of from about pH 4.5 to about pH 7.5 by adding a base to the mixture.

The invention relates to a process for the preparation of an allulose syrup containing allulose at a product concentration of more than 70 wt.-%, relative to the total weight of the allulose syrup, the process comprising the steps of (a) providing an aqueous solution containing allulose at an educt concentration of at most 70 wt.-%, relative to the total weight of the solution; and (b) evaporating water at a temperature of the solution of less than 60° C. and under reduced pressure thereby increasing the concentration of allulose in the aqueous solution starting from the educt concentration until the product concentration is reached.

The invention relates to a process for the preparation of an allulose syrup containing allulose at a product concentration of more than 70 wt.-%, relative to the total weight of the allulose syrup, the process comprising the steps of (a) providing an aqueous solution containing allulose at an educt concentration of at most 70 wt.-%, relative to the total weight of the solution; and (b) evaporating water at a temperature of the solution of less than 60° C. and under reduced pressure thereby increasing the concentration of allulose in the aqueous solution starting from the educt concentration until the product concentration is reached.

This disclosure describes processes for using a single cellulosic feedstock or a combination of two or more different cellulosic feedstocks with a starch component to produce a fermented product. The process includes separating the components of the cellulosic feedstocks with fractionation, pretreating a component with wet fractionation with chemicals, hydrolysis and fermenta-tion of the pretreated feedstock(s) to produce cellulosic biofuel. The process may include combining the cellulosic feedstock(s) with other components to a cook and/or a fermentation process, distilling and dehydrating the combined components to produce the biofuel. The process may also include producing a whole stillage stream from the feedstock(s) and mechanically processing the whole stillage stream to produce a high-value protein animal feed.

The invention relates to a method and an apparatus for producing a soluble carbohydrate containing fraction (10), in which lignocellulose material (3) formed by treating plant based raw material (1) is conducted into a separation stage (4). The method comprises at least one solid-liquid separation stage (4) for separating a soluble carbohydrate containing fraction (10) and/or a washing filtrate (12) from lignocellulose material (3), and at least a part of the soluble carbohydrate containing fraction (10) and/or the washing filtrate (12) is recirculated to the lignocellulose material (3) for increasing concentration of the soluble carbohydrate containing fraction, and solids (11) and at least a part of the soluble carbohydrate containing fraction (10) are supplied out from the separation stage. Further, the invention relates to the soluble carbohydrate containing fraction and the solid fraction, and their uses.