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ＢＩＣＥＮＴＲＡＬＰＯＬＹＭＥＲＳＵＰＰＯＲＴＥＤＰＨＡＳＥＴＲＡＮＳＦＥＲＣＡＴＡＬＹＳＴＰＯＬＹＳＴＹＲＥＮＥ－ＳＵＰＰＯＲＴＥＤＰＯＬＹＥＴＨＹＬＥＮＥＧＬＹＣＯＬＡＮＤＰＹＲＩＤＩＮＩＵＭＳＡＬＴＹａｎｇＪｉａｎｗｅｎ（Ｉｎｓｔｉｔｕｔｅｏｆ... 相似文献
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Some structureal factors to the design of polymer-supported Chiral Catalysts are discussed.and some new appraches for designing of polymer-supported catalysts are reviewed in this paper. 相似文献
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The supported Rh-DIOP complexes were prepared through functionalization of several macroporous polystyrene resins and were evaluated by the hydrogenation of acetamidocinnamic acid in EtOH. The pore effect of the matrixes was discussed. 相似文献
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BEHAVIOR OF SUPPORTED NANO-COPPER CATALYST IN CO OXIDATION 总被引：1，自引：0，他引：1
IntroductionNanomaterialisanewkindofmaterialwithparticlesizebetWeenIurnand100urn.Becauseofthesmallparticlesizeandthelargespecificsufficearea,nanomaterialpossessesmanyparticularproperties,suchashighersufficeenergyandhighersurfaceactivity.t.[l]Thehigheracti… 相似文献
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Asymmetric hydrisilylation catalyzed by polymeric thiazolidine rhodium catalysts was conducted.Almost the same optical yields have been obtained when comb-shaped polymeric ligands and their corresponding monomer complexed rhodium cataltysts were used to asymmetric hydrosilylation of acetophenone.Optical yield of chiral 1-methylbenzyl alcohol reaches as high as 71.5%.Temperature dependence of enantioselective hydrosilylation of acetophenone was discussed. 相似文献
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《天然气化学杂志》1994,(3)
Fe-MnO catalyst supported on alkali modified Si-2 zeolite is a propercatalyst for the production of light olefins from syngas.The MnO Promoter canimprove the dispersion and reducibility of Fe,and leads to a suppression of fur-ther hydrogenation of light olefins produced,while the alkali ions can suppressthe formation of CH_4 and,therefore,are favorable for the formation of lightolefins. 相似文献
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《中国化学快报》1992,(2)
Fe_3(CO)_(12)-derived Fe/r-AL_2O_3 and Fe/zeolite catalysts have higher catalytic activity than those derived from Fe(NO_3)_3. The existence of metal-metal bond in cluster species and the congruity of the adsorption of CO and H_2 are important for increasing the catalytic activity. Carbon deposition for Fe_5C(CO)_(15)-derived Fe/r-AL_2O_3 catalyst is discussed. 相似文献
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YAN Zi-Feng 《天然气化学杂志》1996,5(2):116-125
1yttroductionIMcthancactivationisoncofthemostintriguingsubjectsinheterogencouscatal}'sisbccauscmcthancisathcrmod}namicall}'stabIccompoundt`ithanoblcgas-likeconfiguration.0fintcrcstsisthcrcccntt"orkreportcdb}'KocrtsIll,BeIguedl21.andYanl3ltthosucccssfull}'convcrtnaturalgasintohighcrh}.drocarbonsb}'thctt"o-stcproutcinwhichnaturalgasisfirstthcrmall}'activatcdonthctransitionmctalcatal}.stsatmoderatctemperature.Toasccrtainthcnaturcofrcactionsofmcthane.thcactivationofmcthaneisextensivel)'invcstiga… 相似文献
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The composition distribution (CD) and microisotacticity distribution (ID) of propene/1-hexene copolymer synthesized by MgCl_2/DIBP/TiCl_4 (DIBP: diisobutyl phthalate) weredetermined by fractionating the copolymers according to crystallinity and characterizingthe fractions by ~(13)CNMR. The effects of two alkoxysilane donors, triethoxyphenylsilane(PTES) and dimethoxydi-tert-butylsilane (TBMS), on CD and ID of the copolymrs werecompared. Three main parts in the CD diagram of each copolymer were distinguished,which were correlated to active center distribution (ACD) based on three groupe of dif-ferent active centers. By studying the changes in 1-hexene content, microisotacticity andreactivity ratio product of three typical fractions, the effects of external donor on ACDwere better elucidated. It was found that TBMS shows much stronger effects on ACD thanPTES. In the former system, most fractions were produced on active centers with relativelylower r_1r_2, higher reactivity to 1-hexene, and higher stereospecificity as compared to thesystem without external donor. It is concluded that the observed very extensive changesin ACD are mainly resulted by the formation of new types of active centers, possibly bycoordination of external donor to certain positions on the catalyst. 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