简介：是的乙炔为选择催化减小的一个减少的代理人(C2H2-SCR)不在一系列金属上被调查交换HY催化剂，在0.16%的反应系统没有，0.08%C2H2，和9.95%O2(卷百分比)在他。到有烃效率的N2的75%没有变换大约1.5在300附近在Ce-HY催化剂上被完成??慍楤摮汯湩獥？？

简介：AseriesofcarboxylicacidswasesterifiedtothecorrespondingesterswithTiCl_4ascatalystatroomtemperature,inhighyields.Thiscatalystwashighlyeffectivefortheselectiveesterificationofprimaryalcoholswithcarboxylicacids,inthepresenceofsecondaryalcohols,andfortheselectiveesterificationofsaturatedacidwithalcoholinthepresenceofconjugatedacidoraromaticacid.Onaccountofthehighyield,highchemoselectivity,mildcondition,andbeingfreeofotherdehydrants,thisisanefficientmethod.

简介：Theresearchworkonpreparationprocessofactivematerialsoftherareearthionselectiveelectrodesandthevalenceoftheelectrodemembranewerereported.Theactivematerialswerechacterizedbyinfraredspectrum,elementalanalysisandXPS.Wehadstudiedtherareearthionselectiveelectrodesinwhichtheactivematerialsconsistoffunctionalpolymers.Inthispaper,theresearchworkonpreparationprocessandthevalenceoftheelectrodemembranewerereported,whichhasnotbeenseeninliteratureyet.

简介：Nanofibrous碳的材料(NFC)作为有许多应用的材料的一个新班，能催化H2S的选择氧化到硫。在在H2S氧化的NFC结构和它的活动和选择之间的关联是坚定的。如果有更多的订的结构的NFC被综合，在碳的原来的催化剂的部分被增加在催化剂积累的碳减少，选择能被改进，这被表明。

简介：三3,3-di(4-substituted-phenyl)-1,1-isophthaloylbis(thiourea)混合物作为新奇中立阴离子受体被设计，并且在好收益由简单步骤综合了。受体1的单个晶体结构证明一个溶剂分子被主人分子通过分子间的氢结合捕获。而且，它作为为存在的一个超分子的系统自我装配丰富内部--并且intramolecular氢结合并且-在苯基组之间的相互作用。他们阴离子受体被检验了由的申请紫外力并且1HNMR光谱学，证明他们比另外的卤化物为氟化物有一种更高的选择。主人和客人在第一个步骤通过氢结合相互作用形成了1:1stoichiometry建筑群，然后在F的过量的存在跟随deprotonation的一个过程吗？在DMF的溶剂。

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简介：IntroductionMoleculeimprintingtechnologyhasmadegreatprogressinmakingchiralstationaryphasewithpredeterminedchiralselectivityagainstenantiomerssuchasaminoacidandtheirderivatives;sugarandtheirderivatives;naproxenandmethylbenZylamine’-’.Functionalmonomer...

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简介：Phosphorylatedmesoporouscarbons(PMCs)wereinvestigatedascatalystsinthedehydrationoffructosetohydroxymethylfurfural(HMF).TheacidicPMCsshowbetterselectivitytoHMFcomparedtosulfonatedcarboncatalyst(SC)despiteloweractivity.TheconcentrationofP-OgroupsonthePMCwascorrelatedwiththeactivity/selectivityofthecatalysts;thehighertheP-Oconcentration,thehighertheactivity.However,thehighertheP-Ocontent,thelowertheselectivitytoHMF.Indeed,alowerconcentrationoftheP-OgroupsminimizedthedegradationofHMFtolevulinicacidandtheformationofby-products,suchashumines.Stabilitytestsshowedthatthesesystemsdeactivateduetotheformationofhuminesandwaterinsolubleby-productsderivedfromthedehydrationoffructosewhichblockedthecatalyticallyactivesites.

简介：Theactivationandselectiveconversionofenergy-relatedmoleculesisanimportantresearchareaofenergychemistry.Thedepletionofpetroleumhasstimulatedresearchactivitiesintotheutilizationofnon-petroleumcarbonresourcessuchasnaturalgas(includingconventionaland

简介：Thispaperpresentsanequalizationalgorithmforcontinuousphasemodulation(CPM)overfrequency-selectivechannels.Aspecifictrainingsequenceisfirstembeddedineachdatapacket.Byrecursiveleast-squares(RLS)estimation,thechannelinformationparameterscanbeacquired,andafractionallyspacedequalizerperformsjointdecodingandequalization.Simulationresultsshowthattheproposedalgorithmcanacquirethechannelinformationparametersrapidlyandaccurately,andthatthefractionallyspacedequalizercaneliminatetheintersymbolinterference(ISI)effectively,andisnotsensitivetotiminginaccuracy,sothisalgorithmcanbeexploitedfordemodulationsysteminburstmode.

简介：由支持硅石的钠氢硫酸盐的本甲基酉旨的新debenzylation被描述。debenzylation能有选择地并且高效地被完成在对没有影响象nitro，不饱和的契约，和乙醇酉旨那样的敏感的功能的组的优秀收益好。

简介：ThispaperdealswiththetransportpropertiesofoligomerofpolythioetherPSAusedasmoblecarrierinbulkliquidmembraneforgold(Ⅲ).ItwasfoundthatAu(Ⅲ)canbetransportedbyPSAfromsourcephasetoreceivingphasecompletelyunderappropriateconditionsandonlyAu(Ⅲ)canbetransferredthroughtheliquidmembranetoreceivingphasefromamixtureofNa(I)-Cu(Ⅱ）-Au(Ⅲ）-Fe(Ⅲ）-Pt(Ⅳ）inthefollowingsystem:HAuCl4-HCl(aq.)/PSA-ClCH2-CH2Cl/(NH2)2CS-HCl(aq.).ThetransportrateofAu(Ⅲ）dependedontheconcentrationofcarrier,thethicknessofliquidmembrane,theconcentrationofAu(Ⅲ）insourcephaseandtheacidityofthemedia.

简介：AReviewwith56referencesonthereactionbetweenboricacidandpolyhydroxycompounds,andthedevelopmentsofboron-selectiveresins.

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简介：新奇磁性的阴离子交换树脂NDM-1与ammonolysis和alkylating代理人通过暂停聚合然后functionalized被准备。它为硝酸盐的选择移动的申请与MIEX比较被执行?。结果证明NDM-1比MIEX在硝酸盐移动完成了更高的效率吗？做了，与或没有归功于到它交换地点上的更长的烷基链的竞争阴离子SO42的存在。由于植入的-Fe2O3与容易的分离的优点结合了，磁性的阴离子交换树脂NDM-1被认为比MIEX优异吗？为在实际申请的硝酸盐移动。

简介：AseriesofCoMo/Al2O3catalystsforselectivehydrodesulfurization(HDS)ofgasolinewerestudiedwithRamanspectroscopy,apowerfulmethodthatcreatesspecifcsignalsforthestatesandthedistributionsofoxidicprecursorsandsulfdedactivephases.ThehighertheMoandCo,thelowerthetetrahedrallycoordinatedmolybdate,andthehigherthepolymolybdate.ButtheamountofpolymolybdatedecreasedwhenCoMoO4appeared.Cobalt-promotedpolymolybdatewastheprecursor,anditsrelativecontentcorrelatedwellwiththeHDSselectivity.Forsulfdedcatalysts,addingthecobalt-promoterledtolocaldistortion-disorderoftheMoS2structureandtheformationofaCoMoSphase.Thismethodcanprovideimportantinformationfordesigningnewindustrialselective-HDScatalysts.

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简介：Glycerolcanbeobtainedasaby-productduringbiodieselmanufacture.Itisimportanttoconvertglyceroltovalue-addedproducts.Glycerolesterificationwithaceticacidisoneofthemostpromisingapproachesforglycerolutilization.Itisusuallydifficulttoobtaindiacetinwithgoodactivityandselectivity.Inthiswork,glycerolesterificationwithaceticacidoverdifferentmetaloxides,suchasBi2O3,Sb2O3,SnO2,TiO2,Nb2O5andSb2O5,wasinvestigated.Itwasfoundthatinthesixinvestigatedmetaloxides,onlySb2O5resultedingoodactivityandselectivitytodiacetin.Undertheoptimizedconditions,theglycerolconversionreached96.8%,andtheselectivitytodiacetinreached54.2%,whiletheselectivitytomonoacetinandtriacetinwas33.2%and12.6%,respectively.ThecatalystswerecharacterizedwithFT-IRspectraofadsorbedpyridine,whichindicatedthatinthesixinvestigatedmetaloxides,onlySb2O5possessedBr?nstedacidsitesstrongenoughtoprotonateadsorbedpyridine.ThegoodcatalyticactivityandselectivitytodiacetinmightbemainlyattributabletotheBr?nstedacidsitesofSb2O5.ReusabilitytestsshowedthatwithSb2O5ascatalyst,aftersixreactioncycles,nosignificantchangeintheglycerolconversionandtheselectivitytodiacetinwasobserved.