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James S Chickos - One of the best experts on this subject based on the ideXlab platform.
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the vapor pressure and vaporization enthalpy of r menthofuran a hepatotoxin metabolically derived from the abortifacient terpene r pulegone by correlation gas chromatography
The Journal of Chemical Thermodynamics, 2016Co-Authors: Chase Gobble, James S ChickosAbstract:Abstract The vapor pressure as a function of Temperature and its vaporization enthalpy at T = 298.15 K of R-(+)-menthofuran, a substance metabolically derived from R-(+)-pulegone that is both a flavoring agent at low concentrations and a hepatotoxin at larger ones, is evaluated by correlation-gas chromatography. A vapor pressure p /Pa = (36 ± 12) has been evaluated at T = 298.15 K, and a normal Boiling Temperature of T b /K = 482.4 K is predicted. A Boiling Temperature of T b /K = 374.3 compares with the literature value of T b /K = 371.2 at reduced pressure, p /kPa = 2.93. The vaporization enthalpy of (56.5 ± 3.0) kJ·mol −1 compares to an estimated value of (57.8 ± 2.9) kJ·mol −1 .
Joseph A Rard - One of the best experts on this subject based on the ideXlab platform.
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Boiling Temperature and reversed deliquescence relative humidity measurements for mineral assemblages in the nacl nano3 kno3 ca no3 2 h2o system
Journal of Solution Chemistry, 2006Co-Authors: Joseph A Rard, Kirk Staggs, Susan A CarrollAbstract:Boiling Temperature measurements have been made at ambient pressure for saturated ternary solutions of NaCl + KNO3 + H2O, NaNO3 + KNO3 + H2O, and NaCl + Ca(NO3)2 + H2O over the full composition range, along with those of the single salt systems. Boiling Temperatures were also measured for the four component NaCl + NaNO3 + KNO3 + H2O and five component NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O mixtures, where the solute mole fraction of Ca(NO3)2, x{Ca(NO3)2}, was varied between 0 and 0.25. The maximum Boiling Temperature found for the NaCl + KNO3 + H2O system is ≈134.9 ∘C; for the NaNO3 + KNO3 + H2O system is ≈165.1 ∘C at x(NaNO3) ≈ 0.46 and x(KNO3) ≈ 0.54; and for the NaCl + Ca(NO3)2 + H2O system is 164.7 ± 0.6 ∘C at x{NaCl} ≈ 0.25 and x{Ca(NO3)2} ≈ 0.75. The NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O system forms molten salts below their maximum Boiling Temperatures and the Temperatures corresponding to the cessation of Boiling (dry-out Temperatures) of these liquid mixtures were determined. These dry-out Temperatures range from ≈300 ∘C when x{Ca(NO3)2} = 0 to ≥ 400 ∘C when x{Ca(NO3)2} = 0.20 and 0.25. Mutual deliquescence/efflorescence relative humidity (MDRH/MERH) measurements were also made for the NaNO3 + KNO3 and NaCl + NaNO3 + KNO3 salt mixture from 120 to 180 ∘C at ambient pressure. The NaNO3 + KNO3 salt mixture has a MDRH of 26.4% at 120 ∘C and 20.0% at 150 ∘C. This salt mixture also absorbs water at 180 ∘C, which is higher than expected from the Boiling Temperature experiments. The NaCl + NaNO3 + KNO3 salt mixture was found to have a MDRH of 25.9% at 120 ∘C and 10.5% at 180 ∘C. The investigated mixture compositions correspond to some of the major mineral assemblages that are predicted to control brine composition due to the deliquescence of salts formed in dust deposited on waste canisters in the proposed nuclear repository at Yucca Mountain, Nevada.
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Boiling Temperature and Reversed Deliquescence Relative Humidity Measurements for Mineral Assemblages in the NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O System
Journal of Solution Chemistry, 2006Co-Authors: Joseph A Rard, Kirk Staggs, Susan A CarrollAbstract:Boiling Temperature measurements have been made at ambient pressure for saturated ternary solutions of NaCl + KNO3 + H2O, NaNO3 + KNO3 + H2O, and NaCl + Ca(NO3)2 + H2O over the full composition range, along with those of the single salt systems. Boiling Temperatures were also measured for the four component NaCl + NaNO3 + KNO3 + H2O and five component NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O mixtures, where the solute mole fraction of Ca(NO3)2, x{Ca(NO3)2}, was varied between 0 and 0.25. The maximum Boiling Temperature found for the NaCl + KNO3 + H2O system is ≈134.9 ∘C; for the NaNO3 + KNO3 + H2O system is ≈165.1 ∘C at x(NaNO3) ≈ 0.46 and x(KNO3) ≈ 0.54; and for the NaCl + Ca(NO3)2 + H2O system is 164.7 ± 0.6 ∘C at x{NaCl} ≈ 0.25 and x{Ca(NO3)2} ≈ 0.75. The NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O system forms molten salts below their maximum Boiling Temperatures and the Temperatures corresponding to the cessation of Boiling (dry-out Temperatures) of these liquid mixtures were determined. These dry-out Temperatures range from ≈300 ∘C when x{Ca(NO3)2} = 0 to ≥ 400 ∘C when x{Ca(NO3)2} = 0.20 and 0.25. Mutual deliquescence/efflorescence relative humidity (MDRH/MERH) measurements were also made for the NaNO3 + KNO3 and NaCl + NaNO3 + KNO3 salt mixture from 120 to 180 ∘C at ambient pressure. The NaNO3 + KNO3 salt mixture has a MDRH of 26.4% at 120 ∘C and 20.0% at 150 ∘C. This salt mixture also absorbs water at 180 ∘C, which is higher than expected from the Boiling Temperature experiments. The NaCl + NaNO3 + KNO3 salt mixture was found to have a MDRH of 25.9% at 120 ∘C and 10.5% at 180 ∘C. The investigated mixture compositions correspond to some of the major mineral assemblages that are predicted to control brine composition due to the deliquescence of salts formed in dust deposited on waste canisters in the proposed nuclear repository at Yucca Mountain, Nevada.
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Results from Boiling Temperature Measurements for Saturated Solutions in the Systems NaCl + Ca(NO3)2 + H2O, NaNO3 + KNO3 + H2O, and NaCl + KNO3 + H2O, and Dry Out Temperatures for NaCl + NaNO3 + KNO3 + Ca(NO3)2 + H2O
2005Co-Authors: Joseph A RardAbstract:Boiling Temperature measurements have been made for saturated ternary solutions of NaCl + KNO{sub 3} + H{sub 2}O and NaNO{sub 3} + KNO{sub 3} + H{sub 2}O at three selected salt ratios and for NaCl + Ca(NO{sub 3}){sub 2} + H{sub 2}O over the full composition range. The maximum Boiling Temperature found for the NaCl + Ca(NO{sub 3}){sub 2} + H{sub 2}O system is 164.7 {+-} 0.6 C, and the composition is estimated to occur at x(Ca(NO{sub 3}){sub 2}) {approx} 0.25. Experiments were also performed for the five component NaCl + NaNO{sub 3} + KNO{sub 3} + Ca(NO{sub 3}){sub 2} + H{sub 2}O mixtures with the molar ratio of NaCl:NaNO{sub 3}:KNO{sub 3} held essentially constant at 1:0.9780:1.1468 as the solute mole fraction of Ca(NO{sub 3}){sub 2}, x(Ca(NO{sub 3}){sub 2}), was varied between 0 and 0.25. The NaCl + NaNO{sub 3} + KNO{sub 3} + Ca(NO{sub 3}){sub 2} + H{sub 2}O system forms low melting mixtures and thus Boiling Temperatures for saturated were not determined. Instead, the Temperatures corresponding to the cessation of Boiling (i.e., dry out Temperatures) of these liquid mixtures were determined. These dry out Temperatures range from {approx} 300 C when x(Ca(NO{sub 3}){sub 2}) = 0 to {ge}more » 400 C when x(Ca(NO{sub 3}){sub 2}) = 0.20 and 0.25. The investigated mixture compositions correspond to some of the major mineral assemblages that are predicted to control the deliquescence relative humidity of salts formed by leaching dust samples from the proposed nuclear repository at Yucca Mountain, Nevada.« less
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Results from Boiling Temperature Measurements for Saturated Solutions in the Systems NaCl + KNO{sub 3} + H{sub 2}O, NaNO{sub 3} + KNO{sub 3} + H{sub 2}O, and NaCl + NaNO{sub 3} + KNO{sub 3} + H{sub 2}O
2004Co-Authors: Joseph A RardAbstract:Boiling Temperature measurements have been made for saturated ternary solutions of NaCl + KNO{sub 3} + H{sub 2}O and NaNO{sub 3} + KNO{sub 3} + H{sub 2}O over the full solute mole fraction range, along with the limiting binary solutions NaCl + H{sub 2}O, NaNO{sub 3} + H{sub 2}O, and KNO{sub 3} + H{sub 2}O. Boiling Temperatures have also been measured for the quaternary NaCl + NaNO{sub 3} + KNO{sub 3} + H{sub 2}O mixtures with KNO{sub 3}:NaNO{sub 3} mole ratios of 1.01 and 1.19, which corresponding to the eutectic ratio and a near-eutectic ratio for the NaNO{sub 3} + KNO{sub 3} + H{sub 2}O subsystem. The maximum Boiling Temperature found for the NaCl + KNO{sub 3} + H{sub 2}O system is 134 C and for the NaNO{sub 3} + KNO{sub 3} + H{sub 2}O system is 160 C, but Boiling Temperatures as high as 196 C were measured the NaCl + NaNO{sub 3} + KNO{sub 3} + H{sub 2}O system. These mixture compositions correspond to the major mineral assemblages that are predicted to control the deliquescence relative humidity of salts found by leaching dust samples from the proposed nuclear repository at Yucca Mountain, Nevada.
Chase Gobble - One of the best experts on this subject based on the ideXlab platform.
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the vapor pressure and vaporization enthalpy of r menthofuran a hepatotoxin metabolically derived from the abortifacient terpene r pulegone by correlation gas chromatography
The Journal of Chemical Thermodynamics, 2016Co-Authors: Chase Gobble, James S ChickosAbstract:Abstract The vapor pressure as a function of Temperature and its vaporization enthalpy at T = 298.15 K of R-(+)-menthofuran, a substance metabolically derived from R-(+)-pulegone that is both a flavoring agent at low concentrations and a hepatotoxin at larger ones, is evaluated by correlation-gas chromatography. A vapor pressure p /Pa = (36 ± 12) has been evaluated at T = 298.15 K, and a normal Boiling Temperature of T b /K = 482.4 K is predicted. A Boiling Temperature of T b /K = 374.3 compares with the literature value of T b /K = 371.2 at reduced pressure, p /kPa = 2.93. The vaporization enthalpy of (56.5 ± 3.0) kJ·mol −1 compares to an estimated value of (57.8 ± 2.9) kJ·mol −1 .
Jose O Valderrama - One of the best experts on this subject based on the ideXlab platform.
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critical properties and normal Boiling Temperature of ionic liquids update and a new consistency test
Industrial & Engineering Chemistry Research, 2012Co-Authors: Jose O Valderrama, Luis A Forero, Roberto E RojasAbstract:The group contribution method proposed by Valderrama and Robles in 2007 and extended by Valderrama and Rojas in 2009 to estimate the critical properties of ionic liquids is revised and an additional test for determining the consistency of the estimated properties is proposed. The new testing method includes the calculation of the saturation pressure at the normal Boiling Temperature using an equation of state and an accurate model to represent the Temperature function of the attractive term in the equation of state. In determining the vapor pressure, the critical Temperature, the critical pressure, the critical volume, and the acentric factor determined by group contribution are included. The proposed method complements the previous density test of the authors that tested the critical Temperature, the critical volume, and the normal Boiling Temperature only. A total of 1130 ionic liquids are considered in this work, and double checking, using the density and the normal vapor pressure, is applied. Also, a ...
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critical properties normal Boiling Temperature and acentric factor of another 200 ionic liquids
Industrial & Engineering Chemistry Research, 2008Co-Authors: Jose O Valderrama, Juan A LazzusAbstract:The critical properties, the normal Boiling Temperature, and the acentric factor of 200 ionic liquids have been determined using an extended group contribution method, which is based on the well-known concepts of Lydersen and Joback and Reid, that was developed by the authors. The method does not require any additional data besides knowledge of the structure of the molecule and its molecular mass. Because experimental critical properties of ionic liquids are not available, the accuracy of the method is checked by calculating the liquid density of the ionic liquids considered in the study for which experimental data are available in the literature. The results show that the values determined for the critical properties, the normal Boiling Temperature, and the acentric factor are sufficiently accurate for engineering calculations, generalized correlations, and equation of state methods, among other applications.
Roberto E Rojas - One of the best experts on this subject based on the ideXlab platform.
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critical properties and normal Boiling Temperature of ionic liquids update and a new consistency test
Industrial & Engineering Chemistry Research, 2012Co-Authors: Jose O Valderrama, Luis A Forero, Roberto E RojasAbstract:The group contribution method proposed by Valderrama and Robles in 2007 and extended by Valderrama and Rojas in 2009 to estimate the critical properties of ionic liquids is revised and an additional test for determining the consistency of the estimated properties is proposed. The new testing method includes the calculation of the saturation pressure at the normal Boiling Temperature using an equation of state and an accurate model to represent the Temperature function of the attractive term in the equation of state. In determining the vapor pressure, the critical Temperature, the critical pressure, the critical volume, and the acentric factor determined by group contribution are included. The proposed method complements the previous density test of the authors that tested the critical Temperature, the critical volume, and the normal Boiling Temperature only. A total of 1130 ionic liquids are considered in this work, and double checking, using the density and the normal vapor pressure, is applied. Also, a ...
