FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing tagatose. The method involves the following steps: a) extraction of soya oligosaccharide from by-products of soyabean whey; b) hydrolysis of soya oligosaccharide using α-galactosidase which does not contain invertase; c) isomerisation of the hydrolysed sugar solution using arabinose isomerase to obtain an isomerised product containing mixed sugar containing saccharose, galactose and tagatose as the basic components; and d) separation of the isomerised solution via chromatography.
EFFECT: use of the present method simplifies chromatographic separation of a sugar solution containing at least saccharose, galactose and tagatose.
15 cl, 10 tbl, 11 ex, 18 dwg
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