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| Vaccine compositions |
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| Insecticidal esters |
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Method for fractionating sulphite cooking liquor
| Details |
Inventors: Heikkila , Heikki; Hyoky, Goran; Kuisma, Jarmo;
Assignee: Xyrofin Oy (Helsinki, FI)
Primary Examiner: Therkorn; Ernest G.
Assistant Examiner:
Attorney, Agent or Firm: Scully, Scott, Murphy & Presser
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. |
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DETAILED DESCRIPTION We claim: 1.
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.
2.
A method as claimed in claim 1, wherein all said sectional packing material beds of the system in series form a loop.
3.
A method as claimed in claim 1, wherein said sectional packing material beds of the system form two or more separate loops each comprising one or more sectional packing material beds.
4.
A method as claimed in claim 3, wherein a step of said multi-step sequence comprises one or more recycling phase(s) and/or eluting phase(s) and withdrawal of a product fraction.
5.
A method as claimed in claim 3, wherein a step of said multi-step sequence comprises two or more recycling phases.
6.
A method as claimed in any one of claims 1-4, wherein a step of said multi-step sequence comprises a feeding step for sulphite cooking liquor and/or one or more eluting step(s) and withdrawal of a product fraction or fractions.
7.
A method as claimed in claim 6, wherein said product fractions are a xylose fraction and/or a lignosulphonate-rich fraction and/or residue fraction.
8.
A method as claimed in claim 7, wherein oligosaccharides are separated substantially in said residue fractions.
9.
A method as claimed in claim 1, wherein said sulphite cooking liquor is liquor employed in the cooking of sulphite cellulose, liquor ensuing from the cooking, or a part thereof
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Molecular Biology 
