Method for fractionating sulphite cooking liquor
AssigneeXyrofin Oy
InventorsHeikki Heikkila, Goran Hyoky, Jarmo Kuisma
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Abstract
The invention relates to a method for the fractionation of sulphite cooking liquor by a chromatographic simulated moving bed system in which the liquid flow is effected in a system comprising at least two chromatographic sectional packing material beds. In this method, at least one fraction enriched with monosaccharides and one fraction enriched with lignosulfonates are recovered during a multi-step sequence comprising the following phases: feeding phase of sulphite cooking liquor, eluting phase and recycling phase. The liquid present in the sectional packing material beds with its dry solids profile is recycled in the recycling phase in one or more loops comprising one or more sectional packing material beds.
Claims27
A method for the fractionation of sulphite cooking liquor by a sequential chromatographic simulated moving bed system in which the liquid flow is effected in a system comprising at least two chromatographic sectional packing material beds wherein at least one fraction enriched with monosaccharides and one fraction enriched with lignosulfonates are recovered during a multi-step sequence comprising the following phases:
- feeding phase of sulphite cooking liquor, eluting phase and recycling phase, the liquid present in the sectional packing material beds with its dry solids profile or profiles being recycled in the recycling phase in one or more loops comprising one or more sectional packing material beds.
Dependencies are inferred from the claim text.