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897 Aktuelle Fachpublikationen zum Thema temperature

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Solubility Measurement and Modeling for 2-Benzoyl-3-chlorobenzoic Acid and 1-Chloroanthraquinone in Organic Solvents

17.05.2013 | Yujing You; Ting Gao; Fangli Qiu; Yong Wang; Xiaoying Chen; Wenping Jia; Rongrong Li, Journal of Chemical & Engineering Data, 2013

Solubilities of 2-benzoyl-3-chlorobenzoic acid and 1-chloroanthraquinone in organic solvents of ethyl acetate, acetone, 1,4-dioxane, and toluene were determined experimentally in the temperature range from (273.15 to 323.15) K by gravimetric method. The experimental results indicate that the ...

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Solvent Effects on the Dissociation Constants of Hydroxyflavones in Organic–Water Mixtures. Determination of the Thermodynamic pKa Values by UV–Visible Spectroscopy and DFT Calculations

16.05.2013 | Yamina A. Dávila; Matias I. Sancho; María C. Almandoz; Sonia E. Blanco, Journal of Chemical & Engineering Data, 2013

The acid dissociation constants (pKa) of 7-hydroxyflavone, 3-hydroxyflavone and 5-hydroxyflavone, which are practically insoluble compounds in water but of great biological and physicochemical interest, were determined by UV–visible spectroscopy in ethanol–water and acetonitrile–water ...

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Isobaric Vapor–Liquid Equilibrium Data for Binary System of Glycerol Ethyl Acetal and Acetonitrile at 60.0 kPa and 97.8 kPa

16.05.2013 | Dânia S. M. Constantino; Carla S. M. Pereira; Simão P. Pinho; Viviana M. T. M. Silva; Alírio E. Rodrigues, Journal of Chemical & Engineering Data, 2013

Isobaric vapor–liquid equilibrium (VLE) data for the binary mixture of glycerol ethyl acetal (GEA) and acetonitrile were measured at 60.0 kPa and 97.8 kPa, using a dynamic recirculating still. The VLE data were correlated using the nonrandom two-liquid (NRTL) and universal quasichemical ...

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Thermodynamics of LiFePO4 Solid-Phase Synthesis Using Iron(II) Oxalate and Ammonium Dihydrophosphate as Precursors

15.05.2013 | Alexei V. Churikov; Alexander V. Ivanishchev; Arseni V. Ushakov; Irina M. Gamayunova; Ilya A. Leenson, Journal of Chemical & Engineering Data, 2013

A detailed thermodynamic analysis and an experimental study of the thermolysis mechanism of Li2CO3 + NH4H2PO4 + FeC2O4 blends were performed from the viewpoint of the usage of these compounds for the LiFePO4 solid-phase synthesis. Thermodynamic calculations of the assumed chemical reactions ...

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Measurement and Correlation of the Vapor Pressure of 3,5-Dichloroaniline

14.05.2013 | Yuxiu Li; Hongkun Zhao; Meiling Mao; Zhipeng Yang, Journal of Chemical & Engineering Data, 2013

The saturated vapor pressure of pure 3,5-dichloroaniline was measured from (10.25 to 95.81) kPa in the temperature range from (446.60 to 534.94) K using an ebulliometer. The results were fitted by an Antoine equation using a nonlinear least-squares regression method. The calculated saturated ...

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Dielectric Properties of Concentration-Dependent Ethanol + Acids Solutions at Different Temperatures

14.05.2013 | Winny Routray; Valerie Orsat, Journal of Chemical & Engineering Data, 2013

Dielectric properties of ethanol + HCl and ethanol + acetic acid heated at different temperature levels were recorded at microwave frequencies ranging from 0.5 GHz to 6 GHz, and the corresponding dissipation factor and depth of penetration of the solutions were calculated and analyzed using ...

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Linear Free Energy Relationship (LFER) Analysis of Dissociation Constants of 8-Hydroxyquinoline and Its Derivatives in Aqueous and Dioxane–Water Solutions

07.05.2013 | Waldemar Robak; Wiesław Apostoluk; Paweł Maciejewski; Julia Agnieszka Pielka; Joanna Natalia Kwiotek, Journal of Chemical & Engineering Data, 2013

The linear free energy relationship (LFER) analysis based on the Hammett equation has been applied for dissociation processes of 8-hydroxyquinoline and its derivatives in aqueous and 1,4-dioxane-water solutions. The effects of temperature, composition, and ionic strength of the solutions have ...

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Equilibrium Solubility of CO2 in Aqueous Mixtures of DEA and AEEA

07.05.2013 | Abhinav Bajpai; Monoj Kumar Mondal, Journal of Chemical & Engineering Data, 2013

The present communication presents the new experimental CO2 solubility data in an aqueous mixture of diethanolamine (DEA) and (2-aminoethyl)ethanolamine (AEEA) at CO2 concentrations in the inlet gas stream from (10.13 to 20.27) kPa and temperatures from (303.14 to 333.14) K. The aqueous (DEA ...

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Liquid–Liquid Equilibrium for the Ternary System Acetone Oxime Methyl Ether–Acetone–Water

06.05.2013 | Jia Dong; Hongxing Wang; Cheng Lin; Zhixian Huang; Changshen Ye, Journal of Chemical & Engineering Data, 2013

In the production of acetone oxime methyl ether (AOME) and its related products, AOME usually needs to be separated from the AOME, acetone, and water mixture. As the base data, the liquid–liquid equilibrium data for the AOME–acetone–water ternary system were measured at 293.15 K, 303.15 K, ...

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A Comparison of New Gemini Surfactant Modified Clay with its Monomer Modified One: Characterization and Application in Methyl Orange Removal

03.05.2013 | Yujun Wang; Xiaohui Jiang; Limei Zhou; Chunjie Wang; Yunwen Liao; Ming Duan; Xiaomin Jiang, Journal of Chemical & Engineering Data, 2013

New gemini surfactant, glycol bis-N-tetradecyl nicotinate dibromide (designated EG), and the corresponding monomer, methyl N-tetradecyl nicotinate bromide (ES), were synthesized and utilized to modify sodium bentonite (Na-Bt). EG-Bt and ES-Bt, the surfactant modified bentonites, were then ...

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