超临界萃取技术在食品上的应用（application of supercritical extraction technology in food）

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1、超临界萃取技术在食品上的应用（Applicationofsupercriticalextractiontechnologyinfood）TheapplicationofsupercriticalcarbondioxidefluidextractioninthefoodindustryPicktoarticlesummarizesthecharacteristicsofsupercriticalco2fluidextractiontechnologyfromdrinksandalcohol,oil,polyunsatu

2、ratedfatTheapplicationofacid,naturalpigmentandnaturalflavorwereintroduced.SimultaneouspairProspectofCO2fluidextractiontechnologyintheworldThefuture.KeywordsSupercriticalCarbonDioxideSupercriticalfluidExtractionoffoodCarbonDioxideExtractiontheAbstract:Thispaper

3、reviewstheresearchesonSupercriticalCO2fluidExtractionanditsApplicationinfiveaspects(containingdrinks,lipids,polyunsaturatedfattyacid,naturalPigmentandnaturalperfume).AtlastThispaperprospectstheitsdevelopmentinthefuture.Keywords:CO2supercriticalfluid;Extraction;T

4、hefoodSupercriticalfluidextraction(SFE)is70yearsoldAnextractionandseparationtechniquedevelopedintheageofsupercriticalfluid(supercriticalfluid)Thecharacteristicsofbothgasandliquidareclosetotheliquid,andtheviscosityanddiffusioncoefficientareclosetothegasItnotonlyha

5、sthesolventofliquidsolvent,butalsohasexcellentmasstransferperformanceIsCO2fluidiswidelyapplied,itscriticaltemperaturefor31.265℃,criticalpressurefor7.18mpa,isnearTheboundaryconditionsareeasytoachieve.Undersupercriticalconditions,thedensityofCO2fluidchangestotemper

6、atureandpressureSensitive,itssolubilityandpressureareproportionaltoacertainrange,andthuscanchangethetemperatureofthesystemAndpressuretochangethesolubilityoftheextract,sothatitcanbeseparatedandextractedThepurposeisthatsfe-co2isanenvironmentallyfriendly"green"chemi

7、caltechnology[1],soithasbecomeInthispaper,supercriticalCO2inrecentyearsisreviewedinthispaperTheapplicationofsfe-co2inthefoodindustry.1.SupercriticalextractionprincipleWhenthetemperatureandpressureofthefluidareatitscriticaltemperatureandpressure,thefluidiscalledov

8、erflowBoundarycondition.Figure1isatypicalpressure-temperaturediagramofapurefluid.Inthefigure,ATisthesublimationcurveofasolidequilibriumBTsaidasolidliquidequili