绿色化学（slideworld） green chemistry

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1、GreenChemistryGREENCHEMISTRYDEFINITIONGreenChemistryistheutilisationofasetofprinciplesthatreducesoreliminatestheuseorgenerationofhazardoussubstancesinthedesign,manufactureandapplicationofchemicalproducts.GREENCHEMISTRYISABOUTWasteMinimisationatSourceUseofCataly

2、stsinplaceofReagentsUsingNon-ToxicReagentsUseofRenewableResourcesImprovedAtomEfficiencyUseofSolventFreeorRecyclableEnvironmentallyBenignSolventsystemsGreenChemistryIsAbout...CostWasteMaterialsHazardRiskEnergyReducingChemistryisundeniablyaveryprominentpartofourd

3、ailylives.Chemicaldevelopmentsalsobringnewenvironmentalproblemsandharmfulunexpectedsideeffects,whichresultintheneedfor‘greener’chemicalproducts.AfamousexampleisthepesticideDDT.WhydoweneedGreenChemistry?Greenchemistrylooksatpollutionpreventiononthemolecularscale

4、andisanextremelyimportantareaofChemistryduetotheimportanceofChemistryinourworldtodayandtheimplicationsitcanshowonourenvironment.TheGreenChemistryprogramsupportstheinventionofmoreenvironmentallyfriendlychemicalprocesseswhichreduceoreveneliminatethegenerationofha

5、zardoussubstances.ThisprogramworksverycloselywiththetwelveprinciplesofGreenChemistry.The12PrinciplesofGreenChemistry(1-6)7UseofRenewableFeedstocksArawmaterialorfeedstockshouldberenewableratherthandepletingwhenevertechnicallyandeconomicallypracticable.8ReduceDer

6、ivativesUnnecessaryderivatization(useofblockinggroups,protection/de-protection,andtemporarymodificationofphysical/chemicalprocesses)shouldbeminimisedoravoidedifpossible,becausesuchstepsrequireadditionalreagentsandcangeneratewaste.9CatalysisCatalyticreagents(ass

7、electiveaspossible)aresuperiortostoichiometricreagents.10DesignforDegradationChemicalproductsshouldbedesignedsothatattheendoftheirfunctiontheybreakdownintoinnocuousdegradationproductsanddonotpersistintheenvironment.11Real-timeAnalysisforPollutionPreventionAnaly

8、ticalmethodologiesneedtobefurtherdevelopedtoallowforreal-time,in-processmonitoringandcontrolpriortotheformationofhazardoussubstances.12InherentlySaferChemistryforAccidentPre