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1.037 Aktuelle Fachpublikationen zum Thema temperature

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Speed of Sound Measurements in Ethanol and Benzene over the Temperature Range from (253.2 to 353.2) K at Pressures up to 30 MPa

19.03.2015 | Robin Wegge; Markus Richter; Roland Span, Journal of Chemical & Engineering Data, 2015

The speed of sound in ethanol and benzene was measured over the temperature range of (253.2 to 353.2) K with pressures up to 30MPa utilizing the double-path length pulse-echo technique. The speed of sound system was calibrated with pure water at temperatures between T = (274.15 and 353.15) K and ...


Determination and Modeling of the Solubility of 2,4-Dimethoxybenzoic Acid in Six Pure and Isopropanol + Ethyl Acetate Mixed Organic Solvents at Temperatures From (288.15 to 323.15) K

18.03.2015 | Yuanming Tian; Jinhuan Li; Bin Wu; Yuqiang Zhang; Hongjian Tang; Qunsheng Li, Journal of Chemical & Engineering Data, 2015

In our experiment, a dynamic method was taken to measure the solubilities of the 2,4-dimethoxybenzoic acid under atmospheric pressure (p = 0.1 MPa) in ethanol, n-propanol, isopropanol, n-butanol, isobutanol, and ethyl acetate as well as in the isopropanol + ethyl acetate mixtures from (288.15 to ...


Synthesis of Ion-Pair Amphiphiles and Calorimetric Study on the Gel to Liquid-Crystalline Phase Transition Behavior of Their Bilayers

18.03.2015 | Wei-Han Lee; Yi-Li Tang; Tzu-Chin Chiu; Yu-Min Yang, Journal of Chemical & Engineering Data, 2015

In this work, nine homologous ion-pair amphiphiles (IPAs) were successfully prepared by the precipitation or ion-exchange methods. This demonstrated the feasibility of designing and synthesizing lipid-like amphiphiles from cheap and abundant single-chained cationic and anionic amphiphiles. The ...


New Bicyclic 1,3-Selenazine Derivatives: Distribution in Model Biological Media and Membrane Permeability

17.03.2015 | Svetlana V. Blokhina; Tatyana V. Volkova; Marina V. Ol’khovich; Angelica V. Sharapova; Alexey N. Proshin; German L. ..., Journal of Chemical & Engineering Data, 2015

2-Amino-1,3-selenazine template derivatives in the form of hydrobromides were synthesized. Phenyl, para-isopropylphenyl, and para-fluorophenyl were used as substituents. The distribution coefficients of the compounds in two-component systems modeling biological membranes, pH 2.0 and 7.4 buffer ...


Influence of NH4Br on Solvation Behavior of Polyhydroxy Solutes in Aqueous Solutions at Different Temperatures and Atmospheric Pressure

12.03.2015 | Parampaul K. Banipal; Sonika Arti; Tarlok S. Banipal, Journal of Chemical & Engineering Data, 2015

Precise density and viscosity measurements on ternary solutions (polyhydroxy solute + NH4Br + H2O) have been carried out over the temperature range (288.15 to 318.15) K at atmospheric pressure. Partial molar volumes, V2° at infinite dilution and the Jones-Dole B-coefficients obtained from above ...


Density, Viscosity, and Surface Tension of Liquid Phase Beckmann Rearrangement Mixtures

12.03.2015 | Klaas T. Zuidhof; Mart H. J. M. de Croon; Jaap C. Schouten; Johan T. Tinge, Journal of Chemical & Engineering Data, 2015

We have determined the density, dynamic viscosity, and surface tension of liquid phase Beckmann rearrangement mixtures, consisting of ε-caprolactam and fuming oleum. These important properties have been measured in wide ranges of both temperature and molar ratios of acid and ε-caprolactam, ...


Volumetric Properties of Na2SO4–H2O and Na2SO4–NaCl–H2O Solutions to 523.15 K, 70 MPa

12.03.2015 | Denis Zezin; Thomas Driesner; Carmen Sanchez-Valle, Journal of Chemical & Engineering Data, 2015

The densities of aqueous solutions in the systems Na2SO4–H2O and Na2SO4–NaCl–H2O were determined experimentally at temperatures from (298.15 to 523.15) K and pressures up to 70 MPa, and over a wide range of salt concentrations (up to 5 mol·kg–1 of NaCl and up to 1.2 mol·kg–1 of Na2SO4). The ...


Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Potassium Salt at Different Temperatures

11.03.2015 | Yang Lu; Biao Cong; Juan Han; Yun Wang; Zhenjiang Tan; Yongsheng Yan, Journal of Chemical & Engineering Data, 2015

The aqueous two-phase system (ATPS) containing the polyoxyethylene(20) cetyl ether (C56H114O21, POELE20) and three potassium salts (KOH, K2CO3, and K3PO4) at the three temperatures (288.15, 298.15, and 308.15) K were designed. The binodal data of the studied systems were determined and correlated ...


Density, Viscosity, Speed of Sound, Bulk Modulus, Surface Tension, and Flash Point of Binary Mixtures of 2,2,4,6,6-Pentamethylheptane and 2,2,4,4,6,8,8-Heptamethylnonane at (293.15 to 373.15) K and 0.1 MPa and Comparisons with Alcohol-to-Jet Fuel

10.03.2015 | Dianne J. Luning Prak; M. Hope Jones; Jim S. Cowart; Paul C. Trulove, Journal of Chemical & Engineering Data, 2015

In this work, the physical properties of binary mixtures of 2,2,4,6,6-pentamethylheptane and 2,2,4,4,6,8,8-heptamethylnonane were measured and compared with those of alcohol-to-jet fuel. Density and viscosity were measured at temperatures ranging from (293.15 to 373.15) K, and speed of sound was ...


Isothermal Vapor–Liquid Equilibrium Data for the 1,1,2,3,3,3-Hexafluoroprop-1-ene +1,1,2,2,3,3,4,4-Octafluorocyclobutane Binary System: Measurement and Modeling from (292 to 352) K and Pressures up to 2.6 MPa

03.03.2015 | Francois J. Conradie; Philippus L. Crouse; Xavier Courtial; Wayne M. Nelson; Isaak J. van der Walt; Deresh Ramjugernath, Journal of Chemical & Engineering Data, 2015

Isothermal vapor–liquid equilibrium data are presented for the 1,1,2,3,3,3-hexafluoroprop-1-ene and 1,1,2,2,3,3,4,4-octafluorocyclobutane binary system at (292.89, 323.02 and 352.71) K, with pressures ranging from (0.3 to 2.6) MPa. The data were measured using an apparatus based on the ...


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