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简介：PolyvinylChloridereactedwithchlorosulfonicacidtofromapolymercatalystPVC-SO3H.Thispolymercatalystwasfoundtohavehighactivityforresterificationreactionbetweencarboxylicacidsandalcohols.Thispaperdealswiththeconditionsinsynthesisofn-butlyacetatecatalyzedwithPVC-SO3H.ThePVC-SO3Hwasusedasacatalystforpreparing11estersofaceticacid,propionicacidandbutyricacidwiththeyieldsof82-92%.

简介：ThispaperreportsthestudyonthepolymerprotectedcatalystCPVC-FeCl3usedinesterification,transesterification,synthesisofacetalsorketalsandrearrangementreactionofpinacol.Thecatalysthastheadvantagesofbeingsimpleinoperation,non-corrosive,easytoseparatefrommixturesandgoodreusability.

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简介：ThecatalyticreactionofNOwithCOanddecompositionofNOovermetalmodifiedACFswereinvestigatedandcomparedwithothercarrierssupportedcatalysts.ItisdemonstratedthatPd/ACFandPd/Cu/ACFhavehighcatalyticactivityforthereactionofNO/CO,whilePt/ACF.Pt/Cu/ACFandCo/Cu/ACFhaveveryIowcatalyticactivityinsimilarcircumstance.Pd-modifiedACFpossesseshighcatalyticdecompositionofNOat300℃.Pd/CBandPd/GACpresentgoodcatalyticdecompositionabilityforNOonlyatlowflowrate.Pd/G,Pd/ZMSandPd/Ahowever,donotshowanycatalyticactivityforNOdecompositionevenat400℃.Catalytictemperature,NOflowrateandloadingofmetalcomponentsaffectthedecompositionrateofNO.ThecoexistenceofCuwithPdonCu/Pd/ACFleadstocrystallineofpalladiumtomoreunperfectedsoastothatincreasethecatalyticactivity.

简介：Silica-boundmercaptoselenaether-containingsilsesquioxaneanditsplat-inumorrhodiumcomplexweresynthesizedfromγ-(2,3-epithiopropyl)propyltrimethoxysi-laneviaring-openingreactionwithbis(2-hydroxyethyl)sclenide,followedbyhydrolysisandimmobilizationonfumedsilica,andthenreactingwithpotassiumchloroplatiniteorrhodiumchlorideinacetoneundernitrogenatmosphere.Itwasfoundthattwonoblemetalcomplexescancatalyzethehydrosilylationofolefinswithtriethoxysilaneeffectively.Theinfluencesoftemperature,theamountofcomplexused,thenatureofolefinoncatalyticactivitywereinvestigated.

简介：Thecatalytichydrogenationofpalladiumchelatingresinscontainingchiralaminoacidligandsbasedonlowercrosslinkedpoly(chloroethylacrylate)andsomeeffectsontherateofhydrogenationwerestudied.

简介：Acrylateterpolymer-boundSe,Nbidentateligandwassynthesizedfromthesidechainchlorineofcopolymerandβ-dimethylamino-β′-hydroxyl-diethylselenoether.Thepolymer-supportedplatinumcomplexexhibitedhighcatalyticactivityinthehydrosilylationofolefinswithtriethoxysilane.

简介：Copolymerofstyrene-divinylbenzeneinbeadfromwasmadebysuspensionpolymerization.Afterchloromethylationandamination,fivekindsofpolymericamineswerethusobtained.Thesepolymerswerereactedwithpalladiumchloride,andwerethenreduced.Thepolymer-supportedcatalystssynthesizedabovewereusedtocatalyzetheselectivehydrogenationofmesityloxideunderreactionconditionsof80℃and10kg/cm^2,usingmethanolasasolvent.ThecatalyticactivityandMIBK(methylisobutylketone)formationselectivityofthecatalystswereexamined.

简介：Fourpolymer-supportedFe-Cotetrametallicclustershavebeenpreparedbyionexchangeandligandexchange.TheirstructureswerecharacterizedbyIR,UV/visiblediffusereflectancespectraandelementalanalysis,andbyanalogywiththereferenceclusterPhCH2NMe3FeCo3（CO）2.Thefourheterogenousclusterswereefficientcatalystsinthehydroformylationof1-hexene,turnovernumbersamountedto823—924withtheyieldof83.2—92.4%heptylaldehydesandratiosofnormalaldehydetoiso-aldehydeof1.2—1.6,theyarefacilitatedformingthenormalaldehydeincomparisonwiththehomogeneousanalogue.Forthepolymer-supportedclusterspreparedbyionexchange,thepolymer-cationpartshadnoobviouseffectontheactivityoftheclusteranion.Thepolymer-phosphinesubstitutedclusterpreparedbyligandexchangewasmorestablethantheclusterspreparedbyionexchange.

简介：Thechemistryofthethiacrowns,especially,ofthepolymer-supportedthiacrowns,hasnotbeendevelopedtotheextendofthecrownsorazacrowns.Veryfewfunctionalizedthiacrowncompundshavebeenprepared.Nopaperconcerningthepolymer-supportedthiacrownsplatinumcomplexesandtheircatalyticbehaviorhasbeenpublishedyet.Inthispaper,thesynthesisoffumedsilica-supportedpolyundecyloxymethyl-1,4-dithia-7,10,13-trioxacyclopentadecanesiloxaneandsilica-supportedpoly-undecyloxymethyl-1,4-dithia-7,10,13,16-tetraoxacyclooctadecanesiloxane,aswellastheirplatinumcomplexes,andthecatalyticactivityofthecomplexesforthehydrosilylationofolefinswithtriethoxysilanearereported.

简介：Anewtypeofseleniouspolymer,silica-boundpolybispropoxyethyl-selenidesilsesquioxane,anditsplatinumcomplexweresynthesizedfrombis-allyloxyethylselenideviahydrosily-lationwithtriethoxysilane,followedbyimmobilizedonfumedsilica,andthenreactingwithpotassiumchloroplatiniteundernitrogenatmosphereinacetone.Itwasfoundthattheplatinumcomplexcancatalyzethehydrosilylationofolefinswithtriethoxysilaneeffec-tivelyTheeffectsofthenatureofthesubstrate,theamountofcomplexused,andthereactiontemperatureonthecatalyticactivitywereinvestigated.

简介：ThePVCservesofmacroporoussulfoniccation-exchangeresinswerepreparedbythesulfonationofamacroporousPVCbeadwithconcentratedsulfonicacidorchlorosulfonicacid.theresultingsulfonicresinwasemployedintheinvestigationofcatalyticesterificationandsolfteningofwater,Theresultsshowthattheyieldsofestersreach60.0-84.4%accordingasdifferentfattyacidsandalcohols,therefractiveindexesofestersobtainedresemblethosereportedinthereferencesbasically,meanwhile,345Lsoftenedwaterwhichholds≤0.06mmol/Lhardnesswouldbepreparedby1Lwetsulfonicresinreusingfor4times.Theresultingsulfonicresinswouldhave1.6-2.0or2.5-3.0mmol/gexchangecapacitybyusingconcentratedsulfonicacidorchlorosulfonicacidassulfonatingagent,respectively,Thesulfonicresinhasamacroporousstructuretakingthemorphologywithagglomeratesofminutelysphericalgelparticlesascharacteristic.

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简介：Inthispaper,twokindsofPS-PTCsweresynthesizedusingdifferentmethodsbyintroducingcinchonineandquininetothepolymersupport.TheircatalyticpropertiesforthealkylationofN-diphenylmethyleneglycinet-butylesterwerealsocompared.

简介：CuO/γ-Al2O3catalystswerepreparedbyplasmatreatmentandconventionalimpregnationmethods.Thecatalyticcombustionoftwokindsofvolatileorganiccompounds(VOCs),tolueneandbenzene,werecarriedoutovertheseCuO/γ-Al2O3catalysts.ThesurfacepropertiesofthesecatalystswerecharacterizedbyX-rayDiffraction(XRD)andScanningElectronMicroscopy(SEM).TheexperimentalresultsshowedthatincatalyticcombustiontheactivityoftheCuO/γ-Al2O3catalystpreparedviaplasmawasmuchhigherthanthatoftheCuO/γ-Al2O3catalystpreparedbyconventionalimpregnationmethod.XRDresultsshowedthatanenhanceddispersionhadbeenachievedwiththeplasmatreatment.SEMresultsindicatedthatthesizebecamemuchsmallerandthesurfacebecamemoreuniformwiththeplasmatreatment.

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简介：Polymer-supportedRCpCpTiCl2(Cp=η^5-C5H4;RCp=η^5-RC5H4)havebeenpreparedandreducedbyi-C3H7MgBrinsitu，thenusedincatalyticisomerizationof1,5-hexadiene.Theisomerizationof1,5-hexadieneleadstoamixtureofcyclicandlinearproducts.Theratioofcyclictolinearproductdependsonthenatureofthesupporterandthesubstituentonthecyclopentadienylring.Theformercontributesthemost,forexample,silicasupportedCp2TiCl2gavecyclic-linearratioof99/1,whileforpolymer-supportedCp2TiCl2species,linearcompoundsarethemajorproductsandtheratioofcyclictolinearproductchangeswithdifferentRgroupsonthecyclopentadienylring.

简介：ThecomplexresinspreparedfrommacroporoussulfonatedresinD72(H^+form)withferricchlorideorferricchloridehexahydratehavebothsitesofBronstedacidandLewisacid.Inthecatalysisofexterificationofaceticacidwithbutanolthecomplexresinsshowtohavemuchhighercatalyticactivitythanthatofitsmatrix.aconventionalsulfonatedcationexchangeresinD72.