食用油脂脫色用高效活性白土的研制及其吸附性能研究.pdf

1、石河子大學(xué)碩士學(xué)位論文食用油脂脫色用高效活性白土的研制及其吸附性能研究姓名：武占省申請學(xué)位級別：碩士專業(yè)：農(nóng)產(chǎn)品加工與貯藏工程指導(dǎo)教師：李春20060601石河子大學(xué)碩士學(xué)位論文摘要AbstractThecharacterizationofbentonitesfromWulanlingeoreofXiazijieinXinjiangthedevelopmentofitsacidactivatedbentoniteproducts，and

2、theapplicationinoilsbleachingandbleachingperformancewereinvestigatedTheresultswereobtainedasfollows：First，themineralogicalandphysicochemicalpropertiesofWZB，WSBandWXBbentonitesamplesfromWulanlingeorewerecharacterizedItwas

3、provedthatallthethreesamplesbelongedtolow—medium—gradesodium—typebentonite，whichpossessofgoodphysico—chemicalpropertiesandcomposeofabout60％montmoriltonite。tnaddition，wetprocessofpurification011WZBsamplewascarriedOUt：andt

4、heoptimumconditionsfollowedasparticlesizeof80一l00mesh，solidliquidratioofl：10，centrifugationspeedof2000r，min一‘a(chǎn)ndcentrifngationtimeof10minThecontentofmontmorillonitereachedover80％withrecover3rateexceeding75％under睡ebestope

5、rationconditionsSecond，thekeyeffectfactorsofpreparingacidactivatedbentonitewerediscussed，theoptimalconditionsfol‘preparingtheproductswerefollowed，25％sulfuricacidstrength，reactiontimeof4h，reactiontemperatureof95。Candtheso

6、lid—liquidratiosofl：2。OnthisbasisthethreebentoniteswereactivatedtoinvestigateItshowedthatWZBsamplewasactivatedwiththemosteffectively，wherethereweregoodlinearityrelativitybetweenpropertiesoftheproductsandphysicocllelllica

7、Ipropertiesofrawbentonite，F(xiàn)urthermore，activationefficiencyofWZBsampletreatedwithphosphoricacid，sulfuricacidandhydrochloricacidvverestudied，respectively，Itcouldbeseenclearlythatactivationefficiencytreatedwithphosphoricaci

8、dwaspoorasawhole，namelyfleeacidwashigherandbleachingratewaslowerWhereas，activationefficiencywithtreatedsulfuricacidandhydrochloricacidisbetterandboththeproductspreparedwith25％snlfuricacidand30％hydrochloricacid，possessedt

9、hehighestbleachingcapabilityandothersindexesnletaHrequirementsofvegetableoilbleachingThensulfuricacidwasrnoresuitableforactivatedreagentActivitydegreeandfreeacidofacidproductswerevariedsimilarlywithincreasingacidstrength

10、s，andacidstrengthcorrespondingtomaximumofactivitydegreeofacidproductswaslessthanthatofbleachingrateofacidproductsTherewererevel‘selychangingtrendsbetweenbulkdensityandbleachingrateChemicalcomponentsanalysisandstt’ucturec

11、haracterizationonacidactivatedbentonites，which，preparedwithvariousacidstrengths，weredoneIonsofNa，Ca=7innlontmol’illoniteinterlayerreleasedlhstintosolutionwhileoctahedrallycoordinatedMg=，AI’’andFe。releasedslowlyduringacid

12、ification。：_IudMg。ofthemwasmostreadily‘Fhetotalporevolunle、averageporediameterandspecialgUt’faceareaoftheproducts、AercvariedregularlywiththeincreasingofamountsofacidsThirdbleachingefficiencyol’cottonseedoilandsunI]owet“o