FIELD: chemistry.
SUBSTANCE: invention relates to a new method for preparation of a tri (hydroxypyrone) trivalent ferric compound, comprising hydroxypyrone reaction with non-carboxylated ferric salt in an aqueous solution and tri (hydroxypyrone) trivalent ferric compound precipitation from an aqueous solution with pH greater than 7, wherein hydroxypyrone is in an aqueous solution containing a base to which a non-carboxylated salt is added, or wherein hydroxypyrone is added to water, the water is heated, non-carboxylated salt is added to the heated water, and the resulting solution is combined with an aqueous alkaline solution containing hydroxypyrone, and wherein hydroxypyrone is selected from maltol, ethylmaltol and mixtures thereof.
EFFECT: method eliminates organic solvents application, or eliminates previously existing impurities, or increases the yield of ferric iron and hydroxypyrone compound, or reduces the total amount of solvent required for the reaction.
13 cl, 4 ex
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