Process for preparing pure 5-hydroxymethylfurfuraldehyde

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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C07D30750

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047406054

ABSTRACT:
The present invention refers to a process for preparing 5-hydroxymethylfurfuraldehyde, which is also called HMF. This compound was yet prepared by dehydration of fructose-containing carbohydrates in the presence of various catalysts. Nevertheless, the separation of HMF from starting material, by-products and organic solvents was difficult and disadvantageous, especially by the presence of organic solvents. Surprisingly, it came out, that it is possible, to separate 5-hydroxymethylfurfuraldehyde from reaction mixtures, which are obtained by reactions of saccharides with an acid catalyst, in great purity and good yield with exclusive utilization of water as solvent, by means of ion exchangers, and to crystallize it out from chromatographic fractions.

REFERENCES:
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Bonner et al, J. Chem. Soc., (1960), pp. 787-791.
Szamt et al, J. Chem. Tech. Biotechnol, vol. 31 (1981), pp. 135-145.
Brown et al, J. Chem. Tech. Biotechnol, vol. 32 (1982), pp. 920-924.
Fayst et al, Carbohydrate Research, vol. 122 (1983), pp. 59-68.

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