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Distribution Coefficient of Caprolactam and Methyl Caprolactam Using benzene or Toluene as Extractants： Experiments and Prediction

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Chinese Journal of Chemical Engineering 2007年第4期15卷 463-467页

作者：龚行楚吕阳成骆广生 State Key Lab of Chemical Engineering Department of Chemical Engineering Tsinghua University Beijing100084 China

To get high purity caprolactam is a challenging task in the chemical fiber industry. To date, reports on the prediction of the distribution of caprolactam and its derivative chemicals have been few. In this study, the extraction of caprolactam with toluene as the extractant and N-methyl caprolactam with benzene and toluene as theextractants has been camed out. By defining new UNIFAC groups and calibrating related interaction parameters, aUNIFAC method was introduced to predict the equilibrium concentration of caprolactam and methyl caprolactam intoluene or benzene extraction processes. The calculated results fit very well With the experimental data. Using theUNIFAC model, the selectivity of extractants can be predicted.

关键词： extraction UNIFAC model caprolactam benzene toluene

Study on catalytic combustion of benzene over cerium based catalyst supported on cordierite

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Journal of Rare Earths 2013年第2期31卷 124-129页

作者：黄琼严小康李兵陈英文祝社民沈树宝 State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing University of Technology College of Life Science and Pharmaceutical Engineering Nanjing University of Technology College of Materials Science and Engineering Nanjing University of Technology

A series of MnCeOx catalysts supported on cordierite honeycomb （Cord） were prepared by a combustion synthesis method using Mn（NO3）2 , Ce（NO3 ）2·6H2O and citric acid. The effect of the molar ratio of Mn/Ce, calcination time, the amount of citric acid and the effect of water vapor on the catalytic properties for the complete oxidation of benzene were investigated. These catalysts were characterized by X-ray diffraction （XRD）, H 2 temperature-programmed reduction （H2 -TPR）, O2 temperature programmed desorption （O2 -TPD） and scanning electron microscopy （SEM） techniques. The results indicated that the MnCeOx /Cord catalyst with Mn/Ce molar ratio of 1：1, calcining for 7h and M n＋ /（citric acid） molar ratio of 6 exhibited the highest catalytic activity. When the concentration of benzene was 1500 ppm and the gaseous hourly space velocity was 20000h -1 , the conversion of toluene was 99.1% at the reaction temperature of 300 oC.

关键词： MnCeO x /cordierite catalysts catalytic combustion benzene rare earths

Hydroxylation of benzene with Hydrogen Peroxide over Highly Efficient Molybdovanadophosphoric Heteropoly Acid Catalysts

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Chinese Journal of Chemical Engineering 2007年第6期15卷 895-898页

作者：张富民郭麦平葛汉青王军 State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical EngineeringNanjing University of TechnologyNanjing 210009China

Keggin type molybdovanadophosphoric heteropoly acids, H3＋nPMo12-nVnO40（n=1-3）, were prepared by a novel environmentally benign method, and their catalytic performances were evaluated via hydroxylation of benzene to phenol with hydrogen peroxide as oxidant in a mixed solvent of glacial acetic acid and acetonitrile. Various reaction parameters, such as reaction time, reaction temperature, ratio of benzene to hydrogen peroxide, concentration of aqueous hydrogen peroxide, ratio of glacial acetic acid to acetonitrile in solvent and catalyst con- centration, were changed to obtain an optimal reaction conditions. H3＋nPMo12-nVnO40（n=1-3） are revealed to be highly efficient catalyst for hydroxylation of benzene. In case of H5PMo10V2O40, a conversion of benzene of 34.5% with the selectivity of phenol of 100% can be obtained at the optimal reaction conditions.

关键词： hydroxylation heteropoly acid phenol benzene

Catalytic Synthesis of Isopropyl benzene over SO_4 ^(2-)/ZrO_ 2-MCM-41

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Chemical Research in Chinese Universities 2006年第3期22卷 371-374页

作者： WEI Chang-ping LI Shu-zeng ZHOU Bin PENG Chun-jia ZHEN Kai-ji College of Materials and Chemical Engineering Changchun University of Science and Technology Changchun 130022 P. R. China Northeast Research Institute of Electronics Technology Jirtzhou 121000 P. R. China College of Chemistry Jilin University Changchun 130021 P. R. China

Super acid catalyst SO4^2-/ZrO2 was introduced into pure silicone MCM-41 via the impregnation method and the catalyst samples obtained at different temperatures were characterized by means of XRD, IR, and Py-IR techniques. The selectively catalytic gas-phase flow reactions of benzene with propene over the catalyst samples were carried out in a made-to-measure high-pressure flow reactor equipped with a thermostat and a condenser. Effect of the preparative condition on the catalytic synthesis of isopropyl benzene over the catalyst samples was tested. The results show that SO4^2-/ZrO2-MCM-41 （ SZM-41 ） can be used as a catalyst for the title reaction, in which there are a higher conversion （97%） for the propene and a higher selectivity（93% ） for the isopropyl benzene.

关键词： benzene Propene Isopropyl benzene SO4^2-/ZrO2-MCM-41 catalyst

[bmim]Cl/[FeCl3] Ionic Liquid as Catalyst for Alkylation of benzene with 1-Octadecene

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Chinese Journal of Chemical Engineering 2006年第3X期14卷 289-293页

作者：孙学文赵锁奇 State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249China

Abstract The study on the catalysis of ionic liquids for alkylation of benzene with 1-octadecene to synthesize LAB （linear alkylbenzenes） was performed. The results showed that the most important factor that governed the conversion of olefin and selectivity of LAB was reaction temperature. Moreover, the effects of different ionic liquids and molar ratio of benzene to 1-octadecene on the conversion and selectivity were obviously in different degrees. The reaction temperature, molar ratio of benzene to 1-octadecene and the amount of catalyst were lower, compared with the traditional reaction technologies. The experimental results demonstrated that the ionic liquid had higher activity at 30℃, with over 98% selectivity of monoalkylbenzene and 100% conversion of the olefin at the molar ratio 0.08 of FeCl3 in ionic liquid to 1-octadecene and 10 for benzene to 1-octadecene.

关键词： alkylation benzene 1-octadecene [bmim]Cl/[FeCl3] ionic liquid

Effect of metal doping into Ce_(0.5)Zr_(0.5)O_2 on catalytic activity of MnO_x/Ce_(0.5-x)Zr_(0.5-x)M_(0.2x)O_y/Al_2O_3 for benzene combustion

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Journal of Rare Earths 2008年第6期26卷 841-845页

作者：闫生辉王健礼钟俊波陈耀强刘志敏曹红岩龚茂初 College of chemistry Sichuan University

The research investigated the effect of doping two metals separately or together into Ce0.5Zr0.5O2 on the catalytic activity of MnOx/Ce0.5-xZr0.5-xM0.2xOy/Al2O3 （M=Y, Mn, Y and Mn） for catalytic combustion of benzene. The prepared catalysts were characterized by X-ray diffraction （XRD）, surface area analysis, oxygen storage capacity （OSC）, and H2-temperature programmed reduction （H2-TPR）. Catalytic test was performed on a conventional fixed bed flow reactor. The characterization results revealed that Y and Mn ions entered into the ceria-zirconia mixed oxides framework, which improved the textural properties and greatly promoted the MnOx dispersion on the support surface. The complete conversion temperature of benzene on MnOx/Ce0.4Zr0.4Y0.1Mn0.1Oy/Al2O3 was 563 K, and the selectivity of carbon dioxides was 99%. This catalyst could be applied in a wide range of GHSV and wide concentration condition, showing great potential for application.

关键词： catalytic combustion benzene doping MnOx ceria-zirconia compound oxides rare earths

Molecular Dynamics Investigation of benzene in Supercritical Water

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Chinese Journal of Chemical Engineering 2001年第2期9卷 196-199页

作者：周健汪文川仲崇立北京化工大学北京

Microscopic structure and diffusion properties of benzene in ambient water (298 K, 0.1 MPa) and super critical water (673－773 K, 25－35 MPa) are investigated by molecular dynamics simulation with site-site models. It is found that at the ambient condition, the water molecules surrounding a benzene molecule form a hydrogen bond network. The hydrogen bond interaction between supercritical water molecules decreases dramatically under supercritical conditions. The diffusion coefficients of both the solute molecule and solvent molecule at supercritical conditions increase by 30－180 times than those at the ambient condition. With the temperature approaching the critical temperature, the change of diffusion coefficient with pressure becomes pronounced.

关键词： supercritical water benzene diffusion coefficients molecular dynamics molecular simulation

MnO_x/Ce_(0.5+x)Zr_(0.4–x)La_(0.1)O_(1.95)-Al_2O_3 catalysts used for benzene catalytic combustion

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Journal of Rare Earths 2011年第2期29卷 109-113页

作者：廖传文李小双王健礼陈永东曹红岩陈耀强龚茂初 Key Laboratory of Green Chemistry & Technology of Ministry of Education College of ChemistrySichuan University

Complete oxidation of benzene over supported manganese oxides catalysts was *** supports Ce0.5＋xZr0.4–xLa0.1O1.95-Al2O3 （x=0,0.1,0.2,0.3,0.4）,and CeO2-Al2O3 were prepared by co-precipitation method,and manganese oxides （MnOx） catalysts were prepared by incipient wetness *** activity was performed in a conventional fixed bed flow *** these catalysts,MnOx supported on Ce0.8Zr0.1La0.1O1.95-Al2O3 was found to have the highest catalytic activity for benzene *** complete conversion temperature of benzene on MnOx/Ce0.8Zr0.1La0.1O1.95-Al2O3 was 328 *** catalysts were characterized by X-ray diffraction （XRD）,Brunauer-Emmett-Teller （BET） specific surface area,X-ray photoelectron spectra （XPS） and H2-temperature programmed reduction （H2-TPR）.The results of BET and XRD measurements indicated that the addition of ZrO2 improved the textural *** measurements showed that MnOx was composed of MnO2 and *** catalysts reported in this work have significant potential in industrial application for their high performance and low cost.

关键词： catalytic combustion benzene solid solution MnOx La2O3 rare earths

Measurements of the Critical Temperature and Pressure of Ethylene+benzene+Ethylbenzene Mixture

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Chinese Journal of Chemical Engineering 2002年第4期10卷 469-472页

作者：孙明华叶汝强刘涛刘洪来 Department of Chemistry East China University of Science and Technology 上海 200237

Critical temperature (Tc) and critical pressure (pc) of the ternary mixture of ethylene+benzene+ethylbenzene (the mole ratio of ethylbenzene to benzene was fixed at 0.95:0.05) were measured by using a high=pressure view cell with direct visual *** interaction coefficients obtained from the critical properties of the relevant binary systems were used to predict the critical properties (Tc,pc) of the ternary *** agreement between the prediction and experiments is satisfactory.

关键词： critical property ternary mixture benzene ethylbenzene