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SELECTIVE HYDROGENATION OF BENZALDEHYDE TO CYCLOHEXANEMETHANOL CATALYZED BY SILICA－SUPPORTED CARBOXYMETHYL CELLULOSE－PLATINUM COMPLEX 总被引：1，自引：0，他引：1
ＳＥＬＥＣＴＩＶＥＨＹＤＲＯＧＥＮＡＴＩＯＮＯＦＢＥＮＺＡＬＤＥＨＹＤＥＴＯＣＹＣＬＯＨＥＸＡＮＥＭＥＴＨＡＮＯＬＣＡＴＡＬＹＺＥＤＢＹＳＩＬＩＣＡ－ＳＵＰＰＯＲＴＥＤＣＡＲＢＯＸＹＭＥＴＨＹＬＣＥＬＬＵＬＯＳＥ－ＰＬＡＴＩＮＵＭＣＯＭＰＬＥＸ￥Ｌｉ... 相似文献
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ＳＹＮＴＨＥＳＩＳ ＯＦ ＡＳＩＬＩＣＡ－ＳＵＰＰＯＲＴＥＤ ＣＡＲＢＯＸＹＭＥＴＨＹＬ ＣＥＬＬＵＬＯＳＥ ＰＬＡＴＩＮＵＭ ＣＯＭＰＬＥＸ ＡＮＤ ＩＴＳ ＣＡＴＡＬＹＴＩＣ ＢＥＨＡＶＩＯＲＳ ＦＯＲ ＨＹＤＲＯＧＥＮＡＴＩＯＮ ＯＦ ＥＴＨＹ... 相似文献
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ＳＹＮＴＨＥＳＩＳＯＦＰＯＬＹＭＥＲ－ＳＵＰＰＯＲＴＥＤＰＡＬＬＡＤＩＵＭＣＡＴＡＬＹＳＴＳＡＮＤＴＨＥＩＲＣＡＴＡＬＹＴＩＣＢＥＨＡＶＩＯＲＦＯＲＴＨＥＳＥＬＥＣＴＩＶＥＨＹＤＲＯＧＥＮＡＴＩＯＮＯＦＭＥＳＩＴＹＬＯＸＩＤＥＬｉＨｏｎｇ；ＪｉｎＸｉ... 相似文献
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A natural polymer catalyst, sillca-supported chitosan palladium complex (abbr. asSiO_2-CS-Pd) was found to catalyze the hydrogenation of phenol and cresols to correspond-ing cyclohexanones in high yield and 100% selectivity at 70℃ and 1.01325×10~5 Pa mildconditions. N/Pd molar ratio in the complex, temperature and solvents have much infiuenceon the reaction. The reactivity order of reactants was found to be: phenol >m->p->o-cresol. The catalyst is stable during the reaction and could be repeatedly used for severaltimes without much decrease in its catalytic activity. 相似文献
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Wei-xia Tu Han-fan Liu 《高分子科学》2005,(5):487-495
Polymer-stabilized platinum/ruthenium bimetallic colloids （Pt/Ru） were synthesized by polyol reduction with microwave irradiation and characterized by TEM and XPS. The colloidal nanoparticles have small and narrow size distributions. Catalytic performance of the Pt/Ru colloidal catalysts was investigated on the selective hydrogenation of crontonaldehyde （CRAL）. A suitable amount of the added metal ions and base can improve the selectivity of CRAL to crotylalcohol （CROL） remarkably. The catalytic activity and the selectivity are dependent on the compositions of bimetallic colloids. Thereinto, PVP-stabilized 9Pt/1Ru colloid with a molar ratio of metals Pt：Ru = 9：1 shows the highest catalytic selectivity 77.3% to CROL at 333 K under 4.0 MPa of hydrogen. 相似文献
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《中国化学快报》1993,(5)
the catalytic activity of the polymer-bound palladium tetrakis (p-hydroxylphenyl) porphyrin complex (P-THPP-Pd) has been studied. It is found that the polymer catalyst has high selectivity in hydrogenation of olefins, and the rate of initial hydrogen uptake for methyl acrylate is 29.0 (ml H_2/min·g cat). 相似文献
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Copolymer of styrene-divinylbenzene in bead from was made by suspension polymerization.After chloromethylation and amination,five kinds of polymeric amines were thus obtained.These polymers were reacted with palladium chloride,and were then reduced.The polymer-supported catalysts synthesized above were used to catalyze the selective hydrogenation of mesityl oxide under reaction conditions of 80℃ and 10kg/cm^2,using methanol as a solvent.The catalytic activity and MIBK(methyl isobutyl ketone) formation selectivity of the catalysts were examined. 相似文献
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IntroductionSupportedPt-Sncatalystsareimpo~inthepdrileumandpthechendcalindustricsbecauseoftheirsuperiorcatalyticperformances.Forexample,Pt-Snsupportedonaneutralsupporthasbeenreportedtoexhibithighdehydrogenationselectivityanddebilitythansupportedplatinumca… 相似文献
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XIA Chun-GuState Key Laboratory for OSSOLanzhou Institute of Chemical Physics. Academia SinicaLanzhou RICHMOND Michael G. Center for Organometallic Research Education Department of Chemistry University of North Texas Denton TX USA 《天然气化学杂志》1995,(4)
The ruther ium catalvst complex formed from RuCl_3·3H_2O andthe water-soluble ligand tris-(sodium m-sulfophenyl)phosphine, TPPTS, hasbeen examined as a catalyst for the reduction of nitrobenzene to anilineunder water gas shift conditions. The reactions, which were conducted inaqueous methanol. were studied as a function of CO pressure and addedamine base The major product observed over the temperature range of100～150℃ was aniline (>90% yield abovc 130℃ ), with only minor amountsof the corresponding carbamate PhNHCO_2Me(<3%) and formanilide(<4%)being observed. Of the several amine bases examined in this reaction, Et_3Nhas been found to be superior in promoting the fastest rate of nitrobenzenereduction. Replacement of methanol by either THF or xylenes led to a drastic retardation in the amount of aniline produced. 相似文献
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《天然气化学杂志》1994,(4)
Ruthenium supported on rare earth oxides(REO)and the mixture ofrare earth oxides(MREO)was studied as heterogeneous catalyst in the 1-heptene hydroformylation under 5.0 MPa synthesis gas(CO/H_2)at 150℃ for20h.Of the rare earth oxides studied,most are better than Al_2O_3and CeO_2 isthe most efficient support.With MREO as support,the ruthenium content,solvents and pretreating condition were studied in 1-heptene hydroformylation.The results show that the best loading of ruthenium is 4% and non-polarcompounds such as cyclohexane,toluene are better solvents.Ru/MREO(3%)catalyst precarbonylated under 5.0 MPa synthesis gas(CO/H_2=1)at 150℃for 10h has high selectivity to aldehyde and low conversion of 1-heptene.TheFT-IR spectra of catalysts before and after reaction prove that rutheniumcarbonyls on the support surface are formed during the hydroformylation andthe precarbonylation processes,which are catalytic active,unstable anddecomposed during the reaction. 相似文献
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