Catalytic hydrolysis and dehydration of saccharides
AssigneeBoard of Trustees of the University of Arkansas
InventorsXianghong Qian, Ranil Wickramasinghe
Life of this patent
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Abstract
In one aspect, methods of HMF production are described herein. A method of HMF production, in some embodiments, comprises providing a saccharide feedstock including glucose and bringing the saccharide feedstock into contact with a solid state catalytic structure at a temperature sufficient to effectuate dehydration of the glucose to provide HMF. The solid state catalytic structure comprises a substrate having one or more surfaces functionalized with saccharide solubilization functionalities and acid functionalities, wherein the saccharide solubilization functionalities comprise one or more imidazolium salts pendant along chains of a first polymeric species attached to the substrate surface.
Claims20
A method of producing hydroxymethylfurfural (HMF) and levulinic acid comprising:
- providing a saccharide feedstock including glucose;
- bringing the saccharide feedstock into contact with a solid state catalytic structure at a first temperature sufficient to effectuate dehydration of the glucose to provide the HMF;
- and
- bringing the HMF into contact with the solid state catalytic structure at a second temperature sufficient to produce levulinic acid,
- wherein the solid state catalytic structure comprises a substrate having one or more surfaces functionalized with saccharide solubilization functionalities and acid functionalities,
- wherein the saccharide solubilization functionalities comprise one or more imidazolium halide salts pendant along chains of a first polymeric species attached to the substrate surface, and the acid functionalities are pendant along chains of a second polymeric species attached to the substrate surface, and
- wherein the second temperature is higher than the first temperature, wherein the substrate is functionalized according to the reaction scheme of FIG. 1.
A method of producing HMF and levulinic acid comprising:
- providing a solution comprising saccharide feedstock including cellulose in an ionic liquid composition at a first temperature;
- bringing the saccharide feedstock solution into contact with a solid state catalytic structure comprising a substrate having one or more surfaces functionalized with saccharide solubilization functionalities and acid functionalities, wherein the saccharide solubilization functionalities comprise one or more imidazolium halide salts pendant along chains of a first polymeric species attached to the substrate surface, and wherein the acid functionalities comprise aryl sulfonic acid groups pendant along chains of a second polymeric species attached to the substrate surface;
- hydrolyzing the cellulose with the acid functionalities of the solid state catalytic structure to provide glucose feedstock in the ionic liquid composition;
- altering the temperature of the ionic liquid composition to a second temperature;
- bringing the glucose feedstock into contact with the solid state catalytic structure to effectuate dehydration of the glucose to provide the HMF;
- and
- altering the temperature of the ionic liquid composition to a third temperature and bringing the HMF into contact with the solid state catalytic structure to produce levulinic acid,
- wherein the third temperature is higher than the second temperature, wherein the substrate is functionalized according to the reaction scheme of FIG. 1.
Dependencies are inferred from the claim text.