The isothermal solubility and physico-chemical properties(density,refractive index)of ternary system RbCl-EtOH-H 2 O at 25℃and 50℃have been firstly inve stigated by means of self-made micro-equilibrium and sampling ...The isothermal solubility and physico-chemical properties(density,refractive index)of ternary system RbCl-EtOH-H 2 O at 25℃and 50℃have been firstly inve stigated by means of self-made micro-equilibrium and sampling apparatus .The compositio ns of liquid and solid at equilibrium state were determined,and the probl em of analysis of ethanol content in syste m was properly solved.The phase diag ram was drawn by the TPD phase-diagra m computer program developed by us.Three empirical formulae were propose d to correlate the solubility,density and refractive index respectively.No d emixing phenomena was observed in th e range of temperature related in thi s study.展开更多
Amylanthraquinone (AAQ) is a novel,effective working carrier and a potential substitute of 2-ethylanthraquinone (EAQ) in hydrogen peroxide production process.In order to obtain the basic data for the process developme...Amylanthraquinone (AAQ) is a novel,effective working carrier and a potential substitute of 2-ethylanthraquinone (EAQ) in hydrogen peroxide production process.In order to obtain the basic data for the process development,the equilibria method was used to experimentally measure the solubility of AAQ in the mixed organic solvents of trimethylbenzen(TMB) and trioctyl phosphate(TOP) with different volume ratios,at 298.15—323.15 K. It was found that the solubility of AAQ was ca . 3 times greater than EAQ at the same conditions. Finally,experimental data were correlated by the modified λ-h equation,in which a factor of the solvent composition was added.The results showed that the modified λ-h equation can be used to predict the solubility of AAQ in TMB/TOP system with an average relative deviation (ARD) of 5%.展开更多
The solubilities of the quinary system Na^＋ ,K^＋ ,Mg^2＋ //Cl ,NO 3 ^-H2O and its two quaternary subsystems, Na^＋ ,K^＋ ,Mg^2＋ //NO 3 -H2O and K^ ＋ ,Mg ^2＋ //Cl ,NO 3 ^-H2O,were studied by isothermal method at 2...The solubilities of the quinary system Na^＋ ,K^＋ ,Mg^2＋ //Cl ,NO 3 ^-H2O and its two quaternary subsystems, Na^＋ ,K^＋ ,Mg^2＋ //NO 3 -H2O and K^ ＋ ,Mg ^2＋ //Cl ,NO 3 ^-H2O,were studied by isothermal method at 25°C and their phase diagrams were plotted.In the equilibrium phase diagram of quaternary system Na^ ＋ ,K^ ＋ ,Mg ^2＋ //NO 3 ^-H2O, there are one invariant point,three univariant curves and three regions of crystallization with one salt：NaNO3, KNO3 and Mg（NO3）2·6H2O.In the equilibrium phase diagram of quaternary system K ^＋ ,Mg ^2＋ //Cl ,NO 3 ^-H2O,there are three invariant points,seven univariant curves and five regions of crystallization with one salt：KNO3,KCl, Mg（NO3）2·6H2O,MgCl2·6H2O and KCl·MgCl2·6H2O.In the equilibrium phase diagram of the quinary system Na ^＋ , K^ ＋ ,Mg ^2＋ //Cl ,NO 3^ -H2O,there are four invariant points,and seven regions of crystallization with one salt：NaCl, KCl,NaNO3,KCl·MgCl2·6H2O,KNO3,MgCl2·6H2O and Mg（NO3）2·6H2O.展开更多
Using a laser observation technique,the solubilities of trans-1,2-cyclohexanediol in butyl acetate+wa- ter were measured at the temperature range from 298.15K to 323.15K by a synthetic method at atmospheric pres- sure...Using a laser observation technique,the solubilities of trans-1,2-cyclohexanediol in butyl acetate+wa- ter were measured at the temperature range from 298.15K to 323.15K by a synthetic method at atmospheric pres- sure.It is shown that the solubilities of trans-1,2-cyclohexanediol in butyl acetate+water were affected greatly by the proportion of butyl acetate and water,and presented maximum value at given temperature.The UNIFAC model was used to correlate the experimental data.The average relative deviation(ARD)between experimental and calculated values is 3.03%.展开更多
Using a laser detecting system, solubility data were measured for adipic acid dissolved in six pure solvents, namely, cyclohexanone, cyclohexanol, acetic acid, N,N-dimethylformamide, N,N-dimethylacetamide, and dimethy...Using a laser detecting system, solubility data were measured for adipic acid dissolved in six pure solvents, namely, cyclohexanone, cyclohexanol, acetic acid, N,N-dimethylformamide, N,N-dimethylacetamide, and dimethylsulfoxide at the temperature range from 293.15K to 353.15K. All these data were regressed by 2h, NRTL, Wilson, and the modified Wilson models. For the study of six, 2h, NRTL, and the modified Wilson models were found to provide an accurate mathematical representation of the experimental results, with overall average absolute relative deviations between measured and calculated values as 1.74%, 2.06%, and 3.06%, respectively. The results showed that the λh model is the most suitable for description of the solid-liquid equilibrium containing adipic acid.展开更多
文摘The isothermal solubility and physico-chemical properties(density,refractive index)of ternary system RbCl-EtOH-H 2 O at 25℃and 50℃have been firstly inve stigated by means of self-made micro-equilibrium and sampling apparatus .The compositio ns of liquid and solid at equilibrium state were determined,and the probl em of analysis of ethanol content in syste m was properly solved.The phase diag ram was drawn by the TPD phase-diagra m computer program developed by us.Three empirical formulae were propose d to correlate the solubility,density and refractive index respectively.No d emixing phenomena was observed in th e range of temperature related in thi s study.
文摘Amylanthraquinone (AAQ) is a novel,effective working carrier and a potential substitute of 2-ethylanthraquinone (EAQ) in hydrogen peroxide production process.In order to obtain the basic data for the process development,the equilibria method was used to experimentally measure the solubility of AAQ in the mixed organic solvents of trimethylbenzen(TMB) and trioctyl phosphate(TOP) with different volume ratios,at 298.15—323.15 K. It was found that the solubility of AAQ was ca . 3 times greater than EAQ at the same conditions. Finally,experimental data were correlated by the modified λ-h equation,in which a factor of the solvent composition was added.The results showed that the modified λ-h equation can be used to predict the solubility of AAQ in TMB/TOP system with an average relative deviation (ARD) of 5%.
基金Supported by the National Natural Science Foundation of China（20466003 20866008）
文摘The solubilities of the quinary system Na^＋ ,K^＋ ,Mg^2＋ //Cl ,NO 3 ^-H2O and its two quaternary subsystems, Na^＋ ,K^＋ ,Mg^2＋ //NO 3 -H2O and K^ ＋ ,Mg ^2＋ //Cl ,NO 3 ^-H2O,were studied by isothermal method at 25°C and their phase diagrams were plotted.In the equilibrium phase diagram of quaternary system Na^ ＋ ,K^ ＋ ,Mg ^2＋ //NO 3 ^-H2O, there are one invariant point,three univariant curves and three regions of crystallization with one salt：NaNO3, KNO3 and Mg（NO3）2·6H2O.In the equilibrium phase diagram of quaternary system K ^＋ ,Mg ^2＋ //Cl ,NO 3 ^-H2O,there are three invariant points,seven univariant curves and five regions of crystallization with one salt：KNO3,KCl, Mg（NO3）2·6H2O,MgCl2·6H2O and KCl·MgCl2·6H2O.In the equilibrium phase diagram of the quinary system Na ^＋ , K^ ＋ ,Mg ^2＋ //Cl ,NO 3^ -H2O,there are four invariant points,and seven regions of crystallization with one salt：NaCl, KCl,NaNO3,KCl·MgCl2·6H2O,KNO3,MgCl2·6H2O and Mg（NO3）2·6H2O.
基金Supported by the Natural Science Foundation of Henan Province （No.0211020800）.
文摘Using a laser observation technique,the solubilities of trans-1,2-cyclohexanediol in butyl acetate+wa- ter were measured at the temperature range from 298.15K to 323.15K by a synthetic method at atmospheric pres- sure.It is shown that the solubilities of trans-1,2-cyclohexanediol in butyl acetate+water were affected greatly by the proportion of butyl acetate and water,and presented maximum value at given temperature.The UNIFAC model was used to correlate the experimental data.The average relative deviation(ARD)between experimental and calculated values is 3.03%.
文摘Using a laser detecting system, solubility data were measured for adipic acid dissolved in six pure solvents, namely, cyclohexanone, cyclohexanol, acetic acid, N,N-dimethylformamide, N,N-dimethylacetamide, and dimethylsulfoxide at the temperature range from 293.15K to 353.15K. All these data were regressed by 2h, NRTL, Wilson, and the modified Wilson models. For the study of six, 2h, NRTL, and the modified Wilson models were found to provide an accurate mathematical representation of the experimental results, with overall average absolute relative deviations between measured and calculated values as 1.74%, 2.06%, and 3.06%, respectively. The results showed that the λh model is the most suitable for description of the solid-liquid equilibrium containing adipic acid.
