基于膜與色譜的木糖醇分離純化工藝研究.pdf

1、廈門大學碩士學位論文基于膜與色譜的木糖醇分離純化工藝研究姓名：洪詩群申請學位級別：碩士專業(yè)：高分子化學與物理指導教師：藍偉光何旭敏20090601廈門大學理學碩士學位論文ABSTRACTXylitoliswidelyusedasafunctionaladditive，Chinaisplayinganimportantroleinxylitolproductionandmorethan60％xylitolisproducedinChina

2、Unfortunatelymostofthemanufacturersarestillapplyingthetraditionalsynthesisprocess，whichconvertsxylosetoxylitolinhightemperatureaswellashighpressureconditions，SOitisnotanenergyefficientandenvironmentalfriendlyprocessThere

3、fore，itisaninterestingandexcitingworktodevelopanewtypexylitolproductionprocessbasedonbiotransformationwithinnovativeseparationandpurificationtechnologybasedonmembraneandchrotographictechniques，whichwouldreduceresourcesco

4、nsumption，improveproductqualityincreaseproductionyieldandminimizepollutionInthisdissertation，aseriesofpilot—scaeexperimentshavebeencarriedouttoobtaintheoptimizedoperationparametersandconditions，whicharesuitableforenlargi

5、ngthepilot—scaleresultstoindustrialone，afterseparatingcellsbymembrane，desaltinganddecolorizingbyresins，separatingusingcontinuousmovingbed，xylitolsolutioninhi曲puritycallbecontinuouslyproductFirstlychoosingFlowcelultrafilt

6、rationsystemteusingthecells，alsogettingthedialysateinhighyield；secondlyusingthetypicalionexchangeresinchomagraphytodesaltinganddecoloring，thisprocessCanimprovethequalityofxylitolandreducetheeffectsonthecycleofsimulatedmo

7、vingbedforlesssalinityandpigments；thengettingahighperformanceresinforseparatingxylitolfermentation，anddirectinghowtogettheoperationparametersbypulseexperimentandthe‘‘Triangletheory’’；finallyopetatingthecontinuousmovingbe

8、dactuallytoverifyandoptimizetheoperationAtlast，anintegratedseparationandpurificationprocessbasedonmembraneandchromatographyhasbeenstudiedandtheresultshavebeensuccessfullyappliedbyafamousindustrialenterpriseinChinaInthepr