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Speeds of Sound and Excess Isentropic Compressibilities of Butyl Acetate+Aromatic Hydrocarbons 被引量:2
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作者 Bal Raj Deshwal Anu Sharma Krishan Chander Singh 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第4期599-604,共6页
Speed of sound data for butyl acetate+benzene, or toluene, or o-xylene, or m-xylene, or p-xylene binary mixtures have been measured over the entire range of mole fraction at 308.15 K. The excess isentropic compressib... Speed of sound data for butyl acetate+benzene, or toluene, or o-xylene, or m-xylene, or p-xylene binary mixtures have been measured over the entire range of mole fraction at 308.15 K. The excess isentropic compressibilities ( Ks^E ) were computed from speed of sound and density data, derived from molar excess volume data. The Ks^E values were analyzed by using graph theoretical approach. The Ks^E values evaluated by graph theory compared reasonably well with their corresponding experimental values. The Ks^E data were also expressed in terms of Redlich-Kister polynomial equation to derive the coefficients and the standard deviation. 展开更多
关键词 speed of sound isentropic compressibilities graph theory butyl acetate aromatic hydrocarbon
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Preparation and Characterization of Silica Modified with Calix[4]arene Derivatives
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作者 Alahmadi Sana Mohammad Sharifah Mohamad Mohd Jamil Maah 《Journal of Chemistry and Chemical Engineering》 2010年第9期44-49,共6页
Three new silica gel modified with calix[4]arene derivatives (p-tert-butyl-calix[4]arene (PC4), calix[4]arene (C4) and calix[4]arene sulfonate (C4S)) have been prepared via modification of activated silica gel... Three new silica gel modified with calix[4]arene derivatives (p-tert-butyl-calix[4]arene (PC4), calix[4]arene (C4) and calix[4]arene sulfonate (C4S)) have been prepared via modification of activated silica gel with toluene 2,4-di-iso-cyanate (TDI) as linker in tow step. The modified silica were characterized by fourier transform infrared spectroscopy (FT1R), thermal analysis (TGA) and elemental analysis. The FTIR spectra and TGA analysis verified that the calix[4]arene derivates are covalent attached to the silica. Scanning electron microscope SEM and Brunauer-Emmett-Teller BET analysis have been done to get information about the sample's surface shape and area. SEM and BET analysis reveal that the modified silica are in the range of microporous adsorbent. 展开更多
关键词 SILICA CALIX[4]ARENE arene arene sulfonate.
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Effects of Silylation on Zn-IM5 and Its Catalytic Activity for Butane Aromatization
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作者 Yu Lei Yi Dezhi +3 位作者 Lu Yannan Shi Li Chen Junwen Meng Xuan 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2016年第1期44-50,共7页
Effects of silylation on surface properties and catalytic performance of Zn-IM5 for butane aromatization were studied in this paper. Collidine-IR and NH3-TPD analyses revealed that the silylation treatment not only de... Effects of silylation on surface properties and catalytic performance of Zn-IM5 for butane aromatization were studied in this paper. Collidine-IR and NH3-TPD analyses revealed that the silylation treatment not only decreased the quantity of both strong and weak acid sites but also led to a slightly reduced intensity of weak acidity. Silylation of the catalyst promoted the selectivity of BTX by narrowing the channel and cutting the acidity. The effect of temperature of silylation and amount of Si loading were evaluated. The best condition has specified a temperature of 50 ℃ and a SiO_2 loading of 4.0%. 展开更多
关键词 silylation Zn-IM5 aromatization
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戒烟
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作者 关丕福 《辽河》 2006年第2期51-51,共1页
关键词 丁芳 戒烟
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Copper-catalyzed Meerwein carboarylation of alkenes with anilines to form 3-benzyl-3-alkyloxindole 被引量:3
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作者 Shi Tang Dong Zhou +4 位作者 Youlin Deng Zhihao Li You Yang Jianguang He Yingchun Wang 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第4期684-688,共5页
A simple and direct route for double C–C bond formation by copper-catalyzed Meerwein carboarylation process has been developed. In the presence of Cu I(5 mol%), tert-butyl nitrite and anilines, a wide variety of N-ar... A simple and direct route for double C–C bond formation by copper-catalyzed Meerwein carboarylation process has been developed. In the presence of Cu I(5 mol%), tert-butyl nitrite and anilines, a wide variety of N-arylacrylamides underwent tandem Meerwein arylation/C–H cyclization to produce pharmaceutically important 3-benzyl-3-alkyloxindole in moderate to good yield. 展开更多
关键词 radical reaction C-H cyclization Meerwein arylation OXINDOLE COPPER-CATALYZED
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