新型油脂浸出溶剂的筛选

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1、江南大学硕士学位论文新型油脂浸出溶剂的筛选姓名：李昌申请学位级别：硕士专业：粮食、油脂及植物蛋白工程指导教师：王兴国20090301江南大学硕士学位论文关键词：大豆；浸出；正戊烷；正庚烷；环己烷；乙醇；异丙醇AbstractRecently,thecurrentextractionsolventforvegetableoil，胛一hexane，foritshazardtohumanbeinghealthandenvironment,hasbeenincessantlyquestionedbyexpertandscholar．Sochoosinganewextractionsolven

2、t,decreasingthelossofsolvent，anddevelopingthenewextractionprocess，havebeenthefocusesofoilindustrialtechnologyinnovation．Inthispaper,basedontheleachingrate，thequanlityofthecrudeoilandmeal，thedesolventizationofcrudeoilandmeal，theextractionconditionsoffivesolvents(玎-pentane，n-heptane，cyclohexane，e

3、thanolandisopropylalalcohol(IPA))，havebeenstudiedsystematicallyaroundthecentraltargetthatscreeninganewtypesolventforvegetableoilextraction．And，theextractionconditionsofn-pentanewereoptimized．Theproductionoflow-temperaturemealWasattemptted．Usingsixsolventstoextractthesoybeenoil，theextractioneffi

4、ciencyWasreflectedbytheresidualoilinmeal．Inagivencondition，theresidualoilinmeal．is：n-pentane(0．87％)，n-heaxan(0．98％)，以一heptane(1．33％)，IPA(1．49％)，ethanol(1．95％)，cyclohexane(2．55％)．Theresultshowedt11attheextractionefficiencyof刀-pentaneWassimilar、析廿lthatofn-hexane．Theoptimumconditionsfortheextracti

5、onofthesoyl：Ieflnflakesusingn-pentanewere：theflakesthickness0．23lmm，themoisturecontent6．63％，theextractingtimes3，theextractingtemperature26"C．Intheseconditions，theresidualoilinmealWas0．97％．Throughthequanlityanalysisofthecrudeoil，whichextractedatdifferenttemperature，thicknessofflakes，andthemoistu

6、reofflakes，theacidvalueandthephosphatidecontentofdifferentmiscellaswere：n-hexane(1．87mgKOH／g，3．54％)，cyclohexane(2．39mgKOH／g，3．04％)，n-pentane(3．84mgKOH／g，4．27％)，n—heptane(3．53mgKOH／g，4．10％)，ethanol(2．97mgKOH／g，3．94％)，IPA(3．42mgKOH／g，4．52％)．Thequanlityofmiscellawhichextractedwithn-pentaneWasbeRer

7、，andsimilartothequanlityofmiscellawhichextracted埘mcyclohexane．Desolventizingatgiventemperatureandvacuumdegree，whichWas78．47kPa,theresidualsolventinthemiscellaswere：n·pentane(6．77mg／Kg)，n-hexane(11．30mg／Kg)，n-heptane(35．02mg／Kg)，cy