Method for recovering xylose
AssigneeCultor Ltd.
InventorsHeikki Heikkila, Goran Hyoky
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Abstract
A process for recovering xylose from pentosan-containing raw materials includes the steps of hydrolyzing the raw material, feeding the hydrolyzed material to a chromatographic column comprising a strong anion-exchanger having a quaternary ammonium functional group fixed to a cross-linked polystyrene or acrylic resin matrix and eluting a xylose-rich fraction.
Claims18
A process for the production of a high purity xylose fraction from a xylose-rich solution containing other monosaccharides and impurities which does not require a separate ion exclusion step, comprising the steps of
- 1) feeding a xylose-rich solution into a chromatographic column having a strong anion exchange resin in sulfate form;
- 2) eluting the column with an eluent solution comprising water;
- 3) collecting and separating a first fraction comprising a mixed by-product from the column;
- and thereafter
- 4) collecting and separating a xylose-rich fraction of high purity.
A process for the production of high purity xylose fraction from a xylose-rich solution containing monosaccharides and impurities which does not require a separate ion exclusion step, comprising the steps of
- 1) feeding a xylose-rich solution into a chromatographic column having a polystyrene-based ion-exchanger having a quaternary ammonium functional group cross-linked with from about 3 to about 5 percent sulfonated divinyl benzene or an acrylic matrix with quaternary ammonium groups at a flow rate from about 0.04 to about 1.5 m.sup.3 /m.sup.2 /h and at a temperature from about 35 to about 65.degree. C.;
- 2) eluting the column with an eluent solution comprising water;
- 3) collecting and separating a first fraction comprising a mixed by-product fraction from the column;
- and thereafter
- 4) collecting and separating a second fraction comprising a xylose-rich fraction of high purity.
Dependencies are inferred from the claim text.