从木糖母液中回收L-阿拉伯糖的工艺分析

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1、浙江大学硕士学位论文(2010)AbstractL—arabinose，ahealthsugar埘t11apromisingapplicationprospect，hasafancyphysiologicalfunction．Xylosemotherliquor,comefromtheprocessofD-xyloseproduction，isrichinL—arabinose，whileitissoldasbyproductatalowprice．Therefor,theseparationofL—arabin

2、osefromxylosemotherliquorhaspositivesocial，economicalandenvironmentalbenefits．ComponentsofxylosemotherliquorwereanalyzedbymeansofHPLC．XylosemotherliquorconsistedchieflyofD-xylose，L—arabinose，D—glucoseandD—galactose．TheproportionofD—xyloseWasthehighest，followe

3、dbyL—arabinose．TheproportionofD-galactosewasthelowest．SoD—xyloseandL—arabinoseweresetasthekeycomponents．However,D-xyloseandL—arabinoseareisomers，SOtheirstructuresaresimilar,whichmakestheseparationdifficult．Thispaperusedthemethodofchromatographytosolvethisprob

4、lem．Thetypicalseparationmediaforseparationofsugaralcoholsweresulfonatedcross-linkedstyrenedivinylbenzenecationexchangeresins．Thispapersystematicallystudiedtheinfluencesofion—exchangeresintype，counter-ionsfixedontheresin，thedegreeofcross—linkingofthepolymermat

5、rixandresinsizeontheadsorptionbehaviorandseparationeffectbetweenthesetwokeysubstances．AttheconcentrationrangesofO-lOOg／L，D—xyloseandL—arabinosewerelinearlyadsorbedonionexchangers、Ⅳi也alowadsorptionquantity．Forasameresin．thecapacityoftheadsorbentsinrespecttoL··

6、arabinosewaslarger；alowerdegreeofcross·-linkingandK—formresinadsorbedmorethanothers；themacroreticularresinadsorbedmoresugarthanthegelresin．Forexample，at25℃，theequilibriumconcentrationof809／L，theadsorptionquantityofL—arabinosewas65．92gagontheresinof001水6Ca2+,w

7、hilethatofD．xylosewas50．00gag．TheadsorptionquantitiesofL．arabinosewere198．809／kgontheresinof001*2ca2+and79．289／kgontheresinof001*6K+，bothwerehigherthanthatontheresinof001"6Ca2+．Asfortheseparationeffects，Dowex50WX4Ca2+，amiddledegree(4％)，Ca．formandfinegelresinp

8、erformedIV浙江大学硕十学位论文(2010)Abstractbetter,theresolutionofD-xyloseandL-arabinosereached1．0．Theinfluencesofoperatingconditions(velocityofflow,temperature，feedconcentrationandsamplevolume)ont