五元體系NaVO-,3-+KVO-,3-+NaH-,2-PO-,4-+KH-,2-PO-,4-+（NH-,2-）-,2-CO+H-,2-O 298K相平衡及平衡物化性質研究.pdf

1、成都理工大學碩士學位論文五元體系NaVOKVONaHPOKHPO（NH）COHO298K相平衡及平衡物化性質研究姓名：彭蕓申請學位級別：碩士專業(yè)：分析化學指導教師：曾英20060501成都理T大學碩士學位論文AbstractVanadiumisanimportantlifeelementIthasstrongtransferabilityinenvironmentThisabilityrelatedtothesolubilityofva

2、nadiuminsoilsolutioninordertoinvestigatetherelationshipofsolubilitybetweenvanadiumandtheotherCO—existingioninsoilThephaseequilibriaofthequinarysystemNaV03KV03Nail2P04KH2P04(NH2)2COH20anditsfivequaternarysub—systemswerest

3、udiedat298KwithisothermaldissolublemethodAccordingtothereferenceaIIthesesystemsarenotreportedyetThesolubilitiesandthephysico—chemicalpropertiessuchasdensityconductivitypHvalueandrefractiveindexoftheequilibriumsolutionswe

4、redeterminedBasedonthedetenmnedvalues，thesolubilitystereo—diagramandprojected—diagram(saturatedwithKV03)，projecteddiagram(saturatedwith(NH2)2CO)，andwatercontentdiagramofthequinarysystem，isothermalsolubilitydiagramsoftheq

5、uaternarysub—systems，andthephysico—chemicalproperties—compositiondiagramsoftheequilibriumsolutionswereplottedAllthestudiedsystemsinthepaperwereofsimpleeutectictype，nodoublesaltsolidsolutionwerefoundThephysico—chemicalpro

6、pertiesoftheequilibriumsolutionswerechangedregularywiththecompositionInacidicsystem，thesolubilityofvanadiumwasreducedbecauseoftheexisitingofinsolublevanadiumoxideTheisothermalsolubilitydiagramofthequinarysystemNaV03KV03N

7、aH2P04KH2P04(NH2)2COH20consistsoffourinvariantpoints，sixunivariantcuives，andfiveregionsofcrystallizationcorrespondingtoNaV03，KV03，KH2P04，NaH2P04and(NH2)2COFromtheisothermalsolubilitydiagramofthequinarysystemanditsfivequa

8、ternarysub—systems，wecanseethat，therelativesolubilityarerestrainedbecauseoftheexistingofH2P04一and(NH2)2COWhiletheexisitingofK1haslittleeffectonthesolubilityofvanadiumSowecarldeducedthatinsimilarsoilenvironment，thesolubil