Showing papers in "Journal of Chemical & Engineering Data in 1987"
TL;DR: In this article, Viscosities, densities, dielectric constants, and refractive indexes were determined for methanol + dioxane mixtures at 15, 20, 25, 30, and 35 o C. The results indicate molecular interactions between the components of the system.
Abstract: Viscosities, densities, dielectric constants, and refractive indexes were determined for methanol + dioxane mixtures at 15, 20, 25, 30, and 35 o C. The variations of the properties with temperature and composition are represented by means of empirical relations, which fit the results with an uncertainty of the same order of magnitude as the experimental uncertainties. The results indicate molecular interactions between the components of the system
110 citations
TL;DR: Experimental vapor-liquid equilibrium phase compositions, phase densities, and interfacial tensions are presented for CO/sub 2/ + cyclohexane and for CO 2 + benzene at 160/sup 0/F at pressures from 1000 psia to the critical point (interfacial tensions as low as 0.009 mN/M) as mentioned in this paper.
Abstract: Experimental vapor-liquid equilibrium phase compositions, phase densities, and interfacial tensions are presented for CO/sub 2/ + cyclohexane and for CO/sub 2/ + benzene at 160/sup 0/F at pressures from 1000 psia to the critical point (interfacial tensions as low as 0.009 mN/M). These data for CO/sub 2/ with a naphthenic and an aromatic hydrocarbon complement the authors' earlier work on binary mixtures of CO/sub 2/ with the paraffins n-butane and n-decane.
94 citations
TL;DR: The available experimental data on the solubility of the solids in supercritical CO/sub 2/ have been analyzed by using the Peng-Robinson equation of state.
Abstract: Solubility data were obtained for anthracene and mixtures of anthracene with phenanthrene in supercritical CO/sub 2/. The equilibrium solubilities were measured at 308 and 318K isotherms, over a pressure range of 100-275 atm in a semicontinuous flow apparatus. The available experimental data on the solubility of the solids in supercritical CO/sub 2/ have been analyzed by using the Peng-Robinson equation of state.
83 citations
TL;DR: Mesures effectuees pour des temperatures allant de 306 a 618 K and des pressions superieures a 22 MPa as discussed by the authors, a.k.a.
Abstract: Mesures effectuees pour des temperatures allant de 306 a 618 K et des pressions superieures a 22 MPa
78 citations
TL;DR: In this article, the Taylor dispersion technique is used to measure the infinite dilution diffusion coefficients of eight solutes (H-sub 2/, CO, CO/sub 2), n-C/sub 8/H/sub 18, n-c/sub 10/H+sub 22, nc/s/sub 12/H•sub 26, Nc/S•sub 14/H|sub 30, nC/s 15/H−sub 30], nc•S•S|S|Nc|N−S|C|N
Abstract: Taylor dispersion technique is used to measure the infinite dilution diffusion coefficients of eight solutes (H-/sub 2/, CO, CO/sub 2/, n-C/sub 8/H/sub 18/, n-C/sub 10/H/sub 22/, n-C/sub 12/H/sub 26/, n-C/sub 14/H/sub 30/, n-C/sub 16/H/sub 34/) in n-elcosane over the temperature range 100-260 /sup 0/C at 1.38 MPa pressure. The density and viscosity of n-elcosane were measured at the same conditions as well. It is shown that the rough hard-sphere theory can correctly represent the data.
78 citations
TL;DR: In this paper, mutual diffusion coefficients at infinite dilution have been measured for hydrogen, carbon monoxide, and carbon dioxide in the solvents n-heptane, n-dodecane, and n-hexadecane.
Abstract: Mutual diffusion coefficients at infinite dilution have been measured for hydrogen, carbon monoxide, and carbon dioxide in the solvents n-heptane, n-dodecane, and n-hexadecane. The data cover the temperature range from 25 to 293/sup 0/C and pressures of 1415 and 3450 kPa. The Taylor dispersion method was used for diffusion measurements. It was found that the Sovova correlation for diffusion of dissolved gases in liquids failed to predict diffusivities at temperatures above ambient. A free-volume approach to correlation is indicated instead.
70 citations
TL;DR: In this paper, heat capacities and densities of aqueous MgCl/sub 2/, CaCl/ sub 2/, and SrCl /sub 2/ were combined with literature data up to 473 K to yield temperature-dependent equations by using the ion-interaction model of Pitzer.
Abstract: Heat capacities and densities of aqueous MgCl/sub 2/, CaCl/sub 2/, and SrCl/sub 2/ from the accompanying paper are combined with literature data up to 473 K to yield temperature-dependent equations by using the ion-interaction model of Pitzer. These heat capacity equations have been integrated to yield the enthalpy and the Gibbs energy. The enthalpy parameters for 298 K are evaluated in separate calculations using published high-temperature osmotic data as well as heats of dilution, while the Gibbs energy parameters for 298 K are taken from the literature. The range of validity of the final equations is described.
62 citations
56 citations
54 citations
TL;DR: In this paper, the equilibria of the methanol-dlmethyl ether-water system were investigated at temperatures from 498 to 623 K. Equilibria were derived from publlshed thermochemical data together with the experlmental data of a flow reactor at a constant pressure of 200 kPa.
Abstract: Thermodynamlc equlllbrlum constants of the methanol-dlmethyl ether-water system were determlned experlmentally at temperatures from 498 to 623 K. Equlllbrlum was established In the dehydration of methanol over a commerclal y-alumlna catalyst In a flow reactor malntalned at a constant pressure of 200 kPa. The experlmental equillbrlum conversions obtalned In the present lnvestlgation were compared wlth those of the publlshed llterature and with estimates from thermochemlcal data. By use of publlshed thermochemical data together wlth the experlmental data, the enthalpy of formatlon, AHf,298, and free energy of formatlon, AGf,298, of dlmethyl ether were calculated to be -180.22 and -109.66 kJ mol-', respectlvely.
54 citations
TL;DR: In this paper, the osmotic and activity coefficients of aqueous mixtures of NaCl and MgCl/sub 2/ have been determined at 25/sup 0/C by using the isopiestic method.
Abstract: The osmotic and activity coefficients of aqueous mixtures of NaCl and MgCl/sub 2/ have been determined at 25/sup 0/C by using the isopiestic method. These measurements extend from low concentrations to the crystallization limits of the mixtures. They are critically compared to published isopiestic, direct vapor pressure, and emf data for this system. The data agree well with previous isopiestic data and two sets of emf values, but direct vapor pressure data are significantly discrepant. Osmotic and activity coefficients for NaCl-MgCl/sub 2/ mixtures are fairly reliably represented by both Pitzer's equations and Scatchard's neutral electrolyte equations.
TL;DR: The electrical conductance of liquid and supercritical water to high temperatures and pressures is represented by an equation that incorporates some earlier observed trends and a newly discovered reduced-state relationship presented in this article.
Abstract: The electrical conductance of liquid and supercritical water to high temperatures and pressures is represented by an equation that incorporates some earlier observed trends and a newly discovered reduced-state relationship presented here. Calculations with the equation are believed to describe within +-1 to +-5% the specific conductance of liquid water at temperatures from 0 to 374/sup 0/C and at pressures from saturated vapor pressure to 1000 MPa (10 kbar). For supercritical water at fluid densities from about 0.3 to 1 g cm/sup -3/ and at temperatures from 374 to 1000/sup 0/C, the uncertainties probably will increase from 5% to perhaps 15% at the highest temperatures and pressures.
TL;DR: Cas des systemes binaires ethanes+n-docosane, n-tricosane et n-etracosane as discussed by the authors, que montre une transition dans la nature de l'equilibre LLV quand on passe du tricosane au tetrasane.
Abstract: Cas des systemes binaires ethanes+n-docosane, n-tricosane et n-tetracosane L'etude montre une transition dans la nature de l'equilibre LLV quand on passe du tricosane au tetracosane
TL;DR: In this article, the solubility of pyrene in binary solvent mixtures containing cyclohexane was discussed, and it was shown that pyrene is solvable in binary solvability.
Abstract: This article discusses solubility of pyrene in binary solvent mixtures containing cyclohexane.
TL;DR: In this article, the osmotic coefficients of aqueous La(NO/sub 3)/sub 3/ have been measured from 1.3435 to 8.4591 mol.
Abstract: The osmotic coefficients of aqueous La(NO/sub 3/)/sub 3/ have been measured from 1.3435 to 8.4591 mol.kg/sup -1/ at 25/sup 0/C by using the isopiestic method. Some earlier osmotic coefficients for this salt are too high, apparently due to a stock solution concentration error, and have been normalized to the present results. These combined data and other activity data were then used to generate recommended values for the osmotic coefficients, water activities, and mean molal activity coefficients of La(NO/sub 3/)/sub 3/. The solubility of La(NO/sub 3/)/sub 3/.6H/sub 2/O(cr) was determined to be 4.6147 +- 0.0056 mol.kg/sup -1/ by the isopiestic method; this is in excellent agreement with the IUPAC recommended value of 4.610 +- 0.005 mol.kg/sup -1/. Density data were measured for aqueous Eu(NO/sub 3/)/sub 3/ from 0.03996 to 1.1014 mol.kg/sup -1/ at 25/sup 0/C by using pycnometry.
TL;DR: In this article, the solubilities of n-octacosane (n-C/sub 28/H/sub 58/), n-dotriacontane (N 2 ), n-hexatriacontanes (N 3 ), and N 4 in m-xylene have been measured over the temperature range 11.7-38.6/sup 0/C.
Abstract: The solubilities of n-octacosane (n-C/sub 28/H/sub 58/), n-dotriacontane (n-C/sub 32/H/sub 66/), and n-hexatriacontane (n-C/sub 36/H/sub 74/) in m-xylene have been measured over the temperature range 11.7-38.6/sup 0/C. Although the entropies and enthalpies of dissolution are higher than the corresponding values for short-chain alkane solvents, the present data are still well described by the parametric van't Hoff equation.
TL;DR: Determination des solubilites a 100, 200 and 300 i et a 50 atm. du methane, de l'ethane and du dioxyde de carbone dans une parafine lineaire de grande taille (n-C 36 H 74 ).
Abstract: Determination des solubilites a 100, 200 et 300 i et a 50 atm. du methane, de l'ethane et du dioxyde de carbone dans une parafine lineaire de grande taille (n-C 36 H 74 )
TL;DR: In this article, the solubility of anthracene in binary solvent mixtures containing dibutyl ether was investigated and the results showed that it is solubile.
Abstract: Article on the solubility of anthracene in binary solvent mixtures containing dibutyl ether.