V 28 Vapor Pressures, Enthalpies of Vaporization, and Critical Parameters of a Series of Linear Aliphatic Dimethyl Esters of Dicarboxylic Acids [Текст] / S. P. Verevkin, S. A. Kozlova, V. N. Emel'yanenko, E. D. Nikitin, A. P. Popov, E. L. Krasnykh // Journal of Chemical & Engineering Data. - 2006. - Vol. 51, № 5. - С. 1896-1905 Рубрики: ФИЗИКА Кл.слова (ненормированные): VAPOR PRESSURES Аннотация: Vapor pressures and the molar enthalpies of vaporization of the linear aliphatic dimethyl esters of dicarboxylic acids CH3-CO2-(CH2)n-CO2-CH3 with n = (0 to 8) have been determined by the transpiration method. A linear correlation of enthalpies of vaporization (at T = 298.15 K) of the esters studied with the number n and with the Kovat's indices and has been found. The critical temperatures and pressures of the esters with n = (0 to 6) and n = 8 have been measured by the pulse-heating method with the residence times ranging from (0.03 to 1) ms. Experimental data on the critical properties are compared with the estimations by group contribution methods by Constantinou and Gani and by Marrero and Gani. Both methods considerably underestimate the critical temperatures of the esters studied; however, the method by Marrero and Gani provides the prediction of the critical pressures of the esters with an average absolute error approximately equal to the uncertainty of the measurements. ?? \\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2006, v.51, p.1896.pdf |
N 64 Nikitin, E. D. Critical-Point Measurements for Phenylethanoic to 7-Phenylheptanoic Acids [Текст] / E. D. Nikitin, A. P. Popov, Yu. G. Yatluk // Journal of Chemical & Engineering Data. - 2006. - Vol. 51, № 4. - С. 1335-1338 Рубрики: ФИЗИКА Кл.слова (ненормированные): ACIDS Аннотация: The critical temperatures and pressures of phenylalkanoic acids with a straight alkyl chain C6H5(CH2)nCOOH (n = 1 to 6) have been measured. The method of pulse heating of a wire probe placed into the substance under study has been used. The method minimizes the thermal decomposition because residence times are from (0.035 to 1) ms. An equation for the correlation of the critical pressures of phenylalkanoic acids with the number of CH2 groups between phenyl and carboxyl functional groups and molar mass has been obtained. The experimental critical constants of phenylalkanoic acids have been compared with the values calculated by the group-contribution methods of Constantinou and Gani and Marrero and Gani. ?? \\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2006, v.51, p.1335.pdf |
N 64 Nikitin, E. D. Critical temperatures and pressures of some alkanoic acids (C2 to C22) using the pulse-heating method [] / E. D. Nikitin, P. A. Pavlov, A. P. Popov // Fluid Phase Equilibria. - 2001. - Vol. 189, N 1-2. - С. 151-161. - Bibliogr: p. 160-161 (26 n.) . - ISSN 0378-3812 Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL TEMPERATURES -- CRITICAL PRESSURES -- ACIDS -- ALKANOIC ACIDS -- PULSE-HEATING METHOD -- LIQUIDS -- NUMBER OF CARBON ATOMS -- MOLAR MASS Аннотация: This paper presents experimental critical temperatures and pressures of 12 alkanoic acids CnH2nO2 with carbon numbers from 2 to 22. The method of pulse heating of a wire probe placed in the liquid under study has been used. Equations for the correlation of the critical temperatures and pressures of alkanoic acids with the number of carbon atoms and molar mass have meen obtained. |
C 89 Critical Temperatures and Pressures of Straight-Chain Saturated Dicarboxylic Acids (C4 to C14) / E. D. Nikitin, A. P. Popov, N. S. Bogatishcheva, Yu. G. Yatluk // Journal of Chemical & Engineering Data. - 2004. - Vol.49, №6. - С. 1515-1520 Рубрики: ФИЗИКА Кл.слова (ненормированные): DICARBOXYLIC ACIDS -- METHODS OF AMBROSE -- PRESSURES Аннотация: The critical temperatures and pressures of nine saturated straight-chain dicarboxylic acids HOOC(CH2)nCOOH with n = 2, 3, 4, 5, 6, 7, 8, 10, and 12 have been measured. All of the acids investigated are thermally unstable at their critical points. The method of pulse heating of a wire probe immersed in the liquid under study has been used. Residence times are from (0.01 to 1) ms. The experimental critical properties of dicarboxylic acids have been compared with the values calculated by the group-contribution methods of Ambrose, Joback, and Reid, Constantinou and Gani, and Marrero and Gani |
V 28 Vapor Pressures, Enthalpies of Vaporization, and Critical Parameters of a Series of Linear Aliphatic Dimethyl Esters of Dicarboxylic Acids [Текст] / S. P. Verevkin, S. A. Kozlova, V. N. Emel'yanenko, E. D. Nikitin, A. P. Popov, E. L. Krasnykh // Journal of Chemical & Engineering Data. - 2006. - Vol. 51, № 5. - С. 1896-1905 Рубрики: ФИЗИКА Кл.слова (ненормированные): VAPOR PRESSURES Аннотация: Vapor pressures and the molar enthalpies of vaporization of the linear aliphatic dimethyl esters of dicarboxylic acids CH3-CO2-(CH2)n-CO2-CH3 with n = (0 to 8) have been determined by the transpiration method. A linear correlation of enthalpies of vaporization (at T = 298.15 K) of the esters studied with the number n and with the Kovat's indices and has been found. The critical temperatures and pressures of the esters with n = (0 to 6) and n = 8 have been measured by the pulse-heating method with the residence times ranging from (0.03 to 1) ms. Experimental data on the critical properties are compared with the estimations by group contribution methods by Constantinou and Gani and by Marrero and Gani. Both methods considerably underestimate the critical temperatures of the esters studied; however, the method by Marrero and Gani provides the prediction of the critical pressures of the esters with an average absolute error approximately equal to the uncertainty of the measurements. ?? \\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2006, v.51, p.1896.pdf |
N 64 Nikitin, E. D. Critical-Point Measurements for Phenylethanoic to 7-Phenylheptanoic Acids [Текст] / E. D. Nikitin, A. P. Popov, Yu. G. Yatluk // Journal of Chemical & Engineering Data. - 2006. - Vol. 51, № 4. - С. 1335-1338 Рубрики: ФИЗИКА Кл.слова (ненормированные): ACIDS Аннотация: The critical temperatures and pressures of phenylalkanoic acids with a straight alkyl chain C6H5(CH2)nCOOH (n = 1 to 6) have been measured. The method of pulse heating of a wire probe placed into the substance under study has been used. The method minimizes the thermal decomposition because residence times are from (0.035 to 1) ms. An equation for the correlation of the critical pressures of phenylalkanoic acids with the number of CH2 groups between phenyl and carboxyl functional groups and molar mass has been obtained. The experimental critical constants of phenylalkanoic acids have been compared with the values calculated by the group-contribution methods of Constantinou and Gani and Marrero and Gani. ?? \\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2006, v.51, p.1335.pdf |
N 64 Nikitin, E. D. Critical temperatures and pressures of some alkanoic acids (C2 to C22) using the pulse-heating method [] / E. D. Nikitin, P. A. Pavlov, A. P. Popov // Fluid Phase Equilibria. - 2001. - Vol. 189, N 1-2. - С. 151-161. - Bibliogr: p. 160-161 (26 n.) . - ISSN 0378-3812 Рубрики: ФИЗИКА Кл.слова (ненормированные): CRITICAL TEMPERATURES -- CRITICAL PRESSURES -- ACIDS -- ALKANOIC ACIDS -- PULSE-HEATING METHOD -- LIQUIDS -- NUMBER OF CARBON ATOMS -- MOLAR MASS Аннотация: This paper presents experimental critical temperatures and pressures of 12 alkanoic acids CnH2nO2 with carbon numbers from 2 to 22. The method of pulse heating of a wire probe placed in the liquid under study has been used. Equations for the correlation of the critical temperatures and pressures of alkanoic acids with the number of carbon atoms and molar mass have meen obtained. |
C 89 Critical Temperatures and Pressures of Straight-Chain Saturated Dicarboxylic Acids (C4 to C14) / E. D. Nikitin, A. P. Popov, N. S. Bogatishcheva, Yu. G. Yatluk // Journal of Chemical & Engineering Data. - 2004. - Vol.49, №6. - С. 1515-1520 Рубрики: ФИЗИКА Кл.слова (ненормированные): DICARBOXYLIC ACIDS -- METHODS OF AMBROSE -- PRESSURES Аннотация: The critical temperatures and pressures of nine saturated straight-chain dicarboxylic acids HOOC(CH2)nCOOH with n = 2, 3, 4, 5, 6, 7, 8, 10, and 12 have been measured. All of the acids investigated are thermally unstable at their critical points. The method of pulse heating of a wire probe immersed in the liquid under study has been used. Residence times are from (0.01 to 1) ms. The experimental critical properties of dicarboxylic acids have been compared with the values calculated by the group-contribution methods of Ambrose, Joback, and Reid, Constantinou and Gani, and Marrero and Gani |