FIELD: chemistry.
SUBSTANCE: invention refers to the method for preparation of 5-hydroxymethylfurfural by the acid-catalytic conversion of fructose in the two-phase system water-dioxane at atmospheric pressure in the presence of sodium hydrosulphate in the concentrations 200-400 g/l with additives of sulfuric acid (4.9-19.6 g/l) as catalyst and dioxane as extractant (the ratio water/dioxane is in the range 1:2-1:5). 5-hydroxymethylfurfural is used in the production of food additives, pharmaceutics, polymer materials and motor-fuel additives.
EFFECT: decrease of the process time in 2-3 times, reducing of toxity and consumption of the extractant.
1 cl, 7 ex
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