Method for preparing fructose or xylulose from biomass containing glucose or xylose using butanol, and method for separating the same
AssigneeKorea Research Institute of Chemical Technology
InventorsDong Won HWANG, Pravin Pandharinath UPARE, Young Kyu HWANG, In Taek HWANG, Jong San CHANG, Do Young HONG, U Hwang LEE
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Abstract
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.
Claims17
A method for preparing fructose or xylulose from biomass containing glucose or xylose, comprising:
- a first step of reacting the biomass containing glucose or xylose in the presence of a solid base or solid acid catalyst at 80° C. to 150° C. using butanol as a solvent, to isomerize glucose or xylose;
- and
- a second step of cooling the reaction solution obtained from the first step to 40° C. to 60° C. to crystallize unreacted glucose or xylose and then filtering the resultant to remove the unreacted glucose or xylose.
A method for preparing 5-hydroxymethylfurfural or furfural from the biomass containing glucose or xylose, comprising:
- a first step of reacting the biomass containing glucose or xylose in the presence of a solid base or solid acid catalyst at 80° C. to 150° C. using butanol as a solvent, to prepare fructose or xylulose by isomerizing glucose or xylose;
- a second step of cooling the reaction solution obtained from the first step to 40° C. to 60° C. to crystallize unreacted glucose or xylose and then filtering the resultant to remove the unreacted glucose or xylose;
- and
- a third step of adding a solid acid catalyst to the reaction solution obtained from the second step and dehydrating fructose or xylulose, to prepare 5-hydroxymethylfurfural or furfural.
A method for separating a mixture of glucose and fructose, comprising:
- a first step of preparing a solution comprising a mixture of glucose and fructose in butanol;
- and
- a second step of adjusting the temperature of the solution to 40° C. to 60° C. to specifically dissolve fructose, and separating glucose from the solution by filtration.
A method for separating a mixture of xylose and xylulose, comprising:
- a first step of preparing a solution comprising a mixture of xylose and xylulose in butanol;
- and
- a second step of adjusting the temperature of the solution to 40° C. to 60° C. to specifically dissolve xylulose, and separating xylose from the solution by filtration.
Dependencies are inferred from the claim text.