Separation of sugars
AssigneeDanisco Sweetners Oy
InventorsJuho Jumppanen, Vili Ravanko, Heikki Heikkilä, Juha Nurmi, Nina Nurmi, Pia Saari, Katja Häkkä, Jari Lewandowski
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Abstract
The invention relates to the recovery of deoxy sugars, such as fucose from biomass-derived solutions, such as spent liquors obtained from pulping processes. The invention is based on the use of chromatographic fractionation with specific column packing materials and combinations thereof. The deoxy sugar product obtained from the chromatographic fractionation may be further purified by crystallization. The invention also provides a novel crystalline fucose product and a novel process for the crystallization of fucose.
Claims48
A process of recovering fucose from a solution of a hydrolyzate of hemicellulose-containing biomass comprising deoxysugars and other monosaccharides, characterized by
- subjecting said solution to a process comprising the following steps:
- (1) at least one chromatographic fractionation using a column packing material selected from weakly acid cation exchange resins and weakly basic anion exchange resins, and
- (2) at least one chromatographic fractionation using a column packing material selected from strongly basic anion exchange resins and strongly acid cation exchange resins, and
- recovering from fractionations (1) and (2) one or more fractions enriched in fucose.
A process for the crystallization of fucose, characterized in that the crystallization of fucose is carried out from a solution of a hydrolyzate of hemicellulose-containing biomass, which contains more than 45% fucose, less than 20% rhamnose, less than 15% xylose, less than 3% arabinose and less than 1% galactose.
A process for the crystallization of fucose, characterized in that the crystallization of fucose is carried out from a solution of a hydrolyzate of hemicellulose-containing biomass, which contains more than 80% fucose, less than 20% rhamnose, less than 15% xylose, less than 3% arabinose and less than 1% galactose on DS.
A process for the crystallization of fucose, characterized in that the crystallization of fucose is carried out from a solution of a hydrolyzate of hemicellulose-containing biomass, which contains more than 80% fucose, less than 20% rhamnose, less than 15% xylose, less than 3% arabinose and less than 1% galactose on DS and the crystallization provides crystalline fucose having a purity of more than 99% on DS.
Crystalline L-fucose based on biomass, characterized in that it has a melting point higher than 141° C. measured by the European Pharmacopeia method and a purity higher than 99% on DS.
Crystalline L-fucose based on plant biomass, characterized in that it has a melting point higher than 145° C. measured by the European Pharmacopeia method and a purity higher than 99% on DS.
Dependencies are inferred from the claim text.