本文建立一种阴极间接电氧化体系 ,以WO52 -/WO4 2 -催化阴极还原生成的H2 O2 ,间接氧化二甲基亚砜 (DMSO) ,得到产品二甲基砜 :阴极间接电氧化体系具有重要的理论意义和普遍的应用价值 .本文研究了各种因素对生成二甲基砜电流效率的影响 ,获得了最佳工艺条件 ,电流效率大于 70 % ,母液可循环使用无污染 .
A cathodic indirect electro_oxidation system was established for indirect electro_oxidize dimethyl sulfoxide to dimethyl sulfone with electro_reduction generated H 2O 2 catalyzed by the pertungstate/tungstate(WO 5 2- /WO 4 2- )redox mediator. Influences of current density,pH,temperature,and the current efficiencies etc. on the cathodic indirect electro_oxidation of dimethyl sulfone were investigated for determining optimum reaction conditions.The current efficiency reached more than 70%.Mother_liquid could be recycled to use without pollution.
[1] YeagerE .ElectrocatalystsforO2reduction[J].ElectrochimicaActa .,1984,2 9(1) :15 2 7~ 15 37.
[2 ] SudohM .MinamotoK .MakinoT .andHakamadaH .Productionofhydrogenperoxideinacidicsolutionsbyelectrodialysisofperoxideionsgeneratedbyelectroreductionofoxygeninalkalinesolutions[J].J.Chem .eng .Japan ,1991,2 4(4) 4 5 6~ 471.
[3] HoriY .MurataA .TakahashiR .andSuzukiS .ElectroreductionofCOtoCH4andH2H4ataCopperElec trodeinAqueousSolutionsatAmbientTemperatureandPressure[J].J.Am .Chem .Soc .1987(10 9) :5 0 2 2 .
[4 ] VassilievYB .BagotskyVS .OsetrovaNV .KhazovaOA .andMayorovaNA .Electroreductionofcarbondioxide[J].J.Electroanal.Chem .1985 ,1:189,2 71~ 2 73.
[5 ] BortoliniO ,DifuriaF ,ModenaGandSeragliaR .MetalCatalysisinoxidationbyPeroxidationbyDiluteHy drogenPeroxideCatalyzedbyMolybdenumandTungstenDerivativesunderPhasetransferConditions[J].J .Org .Chem .1985 (5 0 ) :2 6 88.