Separation method
AssigneeDanisco Sweeteners Oy
InventorsHeikki Heikkila, Katja Hakka, Juho Jumppanen, Pia Saari, Nina Nurmi, Vili Ravanko
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Abstract
The invention relates to a process of recovering galactose from a solution derived from plant-based biomass. In the process of the invention, the starting solution is subjected to one or more chromatographic fractionation steps, which may carried out with a strongly basic anion exchange resin and optionally with a strongly acid cation exchange resin, in any desired sequence, followed by recovering at least one fraction enriched in galactose. The galactose fraction thus obtained is further purified by crystallization to obtain crystalline galactose. The invention also relates to non-animal derived crystalline D-galactose.
Claims79
A process of recovering galactose from a solution, which is derived from plant-based biomass, comprising
- subjecting said solution to one or more chromatographic fractionations,
- recovering at least one fraction enriched in galactose,
- subjecting said at least one fraction enriched in galactose to crystallization, and
- recovering a plant-based crystalline galactose product.
Crystalline plant-based. non-animal derived D-galactose having a melting point in the range of 163 to 169° C. and a purity of more than 90% on DS.
Crystalline non-animal derived D-galactose, which has an impurity profile comprising at least one sugar selected from D-xylose, L-arabinose, D-mannose and L-rhamnose.
Crystalline non-animal derived D-galactose, which has an impurity profile comprising D-glucose in an amount of less than 0.50% on DS.
Crystalline non-animal derived D-galactose, which has an impurity profile comprising lactose in an amount of less than 0.10% on DS.
Crystalline non-animal derived D-galactose, which has an impurity profile comprising D-glucose in an amount of less than 0.50% on DS, lactose in an amount of less than 0.10% on DS and at least one further sugar selected from D-xylose, L-arabinose, D-mannose and L-rhamnose.
Crystalline galactose intermediate product having a purity of more than 70% galactose on DS and including further sugars selected from xylose, arabinose, rhamnose and mannose in an amount of 2 to 10% on DS.
Dependencies are inferred from the claim text.