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Vapor-Liquid Equilibrium Data of Carbon Dioxide＋methyl propionate and Carbon Dioxide＋Propyl propionate Systems

Chinese Journal of Chemical Physics 2010年第3期23卷 317-324,I0002页

作者：徐伟谢传欣李洪玲田宜灵化学品安全控制国家重点实验室中国石化青岛安全工程研究院青岛266071 石河子大学化学化工学院石河子832003 天津大学理学院化学系天津300072

High-pressure vapor-liquid equilibrium data for the binary systems of methyl propionate＋carbon dioxide and propyl propionate＋carbon dioxide were measured at pressure from 1.00 MPa to 12.00 MPa and temperature in the range from 313 K to 373 K. Experimental results were correlated with the Peng-Robinson equation of state with the two-parameter van der Waals mixing rule. At the same time, the Henry＇s coefficient, partial molar enthalpy change and partial molar entropy change of CO2 during dissolution at different temperature were also calculated.

关键词： Carbon dioxide methyl propionate Propyl propionate Vapor-liquid equilibrium data Henry's coefficient

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Crystal Structure of methyl 3- (2-chlorophenyl )-3- (5, 5-dimethyl-3-hydroxy-2-cyclohexene- 1-one-2-yl) propionate

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Chinese Journal of Structural Chemistry 1998年第4期17卷 249-252页

作者： SHI Da-Qing LU Zai-Sheng TU Shu-Jiang WANG Su-Hui DAI Gui-Yuan(Department of Chemistry, Xuzhou Normal University, Xuzhou 221009) 徐州师范大学化学系江苏徐州

The title compound C18H21ClO4 was synthesized by the reaction of 2-chlorobenzaldehyde, 5, 5-dimethyl-1, 3-cycfohexanedione and isopropylidene malonatein methanol catalyzed by KF-Al2O3 It crystallized in the monoclinic system, spacegroup P21/c, with a = 7. 587(2), b = 11. 736(3), c = 19. 120(7) A, β =101. 30°, V=1669.5(9) A 3, Dc= 1. 340 g/cm3, Z= 4, Mr= 336. 81, A= 0. 71069A, μ（MoKa) =2. 46 cm-1, F(000) = 712. The structure was refined to R=0. 034,Rw=0. 042 for 1468 observed refiections (I>3(I) ). X-ray analysis reveals that thedihedral angle between plane I[C(12)~C(17), Cl] and plane 2[O(1), O(2), C(1),C(2), C(3)] is 66. 98° and the C(11) atom exhibits a distorted tetrahedral configuration. The crystal structure shows that there is a conjugated enol form in the molecule.

关键词： methyl propionate synthesis crystal structure

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Effect of Lanthanum on Catalytic Performance of Ru/Al2O3 Catalyst for Hydrogenation of Esters to Corresponding Alcohols

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Chemical Research in Chinese Universities 2015年第4期31卷 615-620页

作者： ZHANG Lei ZHENG Xiaojuan LI Ruixiang Key Lab of Green Chemistry and Technology Ministry of Education Department of Chemistry Sichuan University Chengdu 610064 P R. China

Ru-La/γ-Al2O3 catalyst was prepared by impregnation method and characterized by temperature pro- grammed reduction（TPR）, transmission electron microscopy（TEM）, X-ray photoelectron spectra（XPS）, Brunauer- Emmett-Teller（BET）, X-ray diffraction（XRD）, and NH3-temperature programmed desorption（NH3-TPD）. NH3-TPD revealed that the strong acidic centers in γ-Al2O3 are not the major factor to cause the hydrolysis of esters to acids in the hydrogenation of esters. The results of TPR and TEM indicate that the appropriately added lanthanum results in the good dispersion of ruthenium and the easy reduction of ruthenium oxide on Ru-Laγ-Al2O3, which could promote the catalytic activity of Ru-La/γ-Al2O3 for the hydrogenation of methyl propionate to propanol. When the amount of lanthanum added in the catalyst was up to 9%（mass fraction）, 4%Ru-9%La/γ-Al2O3 catalyst gave a conversion of methyl propionate of 98.1% and a selectivity of 94.8% to propanol at a reaction temperature of 180℃ and a hydro- gen pressure of 5.0 MPa.

关键词： Ruthenium Lanthanum Alumina methyl propionate Hydrogenation Propanol

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