Центральная Научная Библиотека УрО РАН

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   N 64

    Nikitin, E. D.
    Critical properties of some aliphatic symmetrical ethers [Electronic resource] / E. D. Nikitin, A. P. Popov, N. S. Bogatishcheva // Journal of Chemical Thermodynamics. - 2014. - Vol.68. - С. 288-292. - Bibliogr. : p. 292 (30 ref.)

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL PROPERTIES -- GROUP-CONTRIBUTION METHOD -- ETHERS
Аннотация: The critical temperatures Tc and the critical pressures p c of dihexyl, dioctyl, and didecyl ethers have been measured. According to the measurements, the coordinates of the critical points are T c = (665 ± 7) K, pc = (1.44 ± 0.04) MPa for dihexyl ether, Tc = (723 ± 7) K, pc = (1.19 ± 0.04) MPa for dioctyl ether, and Tc = (768 ± 8) K, pc = (1.03 ± 0.03) MPa for didecyl ether. All the ethers studied degrade chemically at near-critical temperatures. A pulse-heating method applicable to measuring the critical properties of thermally unstable compounds has been used. The times from the beginning of a heating pulse to the moment of reaching the critical temperature were from 0.06 to 0.46 ms. The short residence times provide little decomposition of the substances in the course of the experiments. The critical properties of the ethers investigated in this work have been discussed together with those of methyl to butyl ethers. The experimental critical constants of the ethers have been compared with those estimated by the group-contribution methods of Wilson and Jasperson and Marrero and Gani. The Wilson/Jasperson method provides a better estimation of the critical temperatures and pressures of simple aliphatic ethers in comparison with the Marrero/Gani method if reliable normal boiling temperatures are used in the method of Wilson and Jasperson

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   C 89


    Critical temperatures and pressures of straight-chain alkanediols (C3 to C12) [Electronic resource] / E. D. Nikitin, A. P. Popov, N. S. Bogatishcheva, V. A. Kuznetsov // Fluid Phase Equilibria. - 2013. - Vol.355. - P40-45. - Bibliogr. : p. 45 (30 ref.)

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ALKANEDIOLS -- CRITICAL PROPERTIES -- PULSE-HEATING METHOD
Аннотация: The critical pressures pc and the critical temperatures Tc of diols with straight alkylchains HO(CH2)nOH and n=3, 4, 5, 6, 8, 9, 10, 12 have been measured. All the alkanediols studied decompose at near-critical temperatures. A pulse-heating method which allows measuring the critical properties of thermally unstable compounds has been used. The times of heating from the beginning of a pulse to the moment of reaching the critical temperature were from (0.03 to 0.46)ms. The short residence times provided little degradation of the substances in the course of the experiments. The uncertainties of the measurement of the critical properties of alkanediols are 0.04 pc and 0.015 Tc, where Tc is the absolute temperature. The critical properties obtained have been compared with the values measured earlier by various techniques. The experimental critical constants of alkanediols have also been compared with those calculated using the group-contribution methods of Lydersen, Wilson and Jasperson, and Marrero and Gani

\\\\expert2\\NBO\\Fluid Phase Equilibria\\2013, v.355, p. 40-45.pdf
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   N 64

    Nikitin, E. D.
    Critical properties of some alkylnaphthalenes / E. D. Nikitin, A. P. Popov, N. S. Bogatishcheva // Fluid Phase Equilibria. - 2013. - Vol.358. - 296-s300. - Bibliogr. : p. s300 (41 ref.)

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ALKYLNAPHTHALENES -- GROUP-CONTRIBUTION METHOD -- CRITICAL PROPERTIES
Аннотация: The critical pressures and the critical temperatures of 1-methylnaphthalene, 2-methylnaphthalene, 1,3-dimethylnaphthalene, 1,4-dimethylnaphthalene, 2-ethylnaphthalene have been measured. All the alkylnaphthalenes investigated decompose at near-critical temperatures. A pulse-heating method applicable to measuring the critical properties of thermally unstable compounds has been used. The times of heating from the beginning of a pulse to the moment of reaching the critical temperature were from 0.03 to 0.46. ms. The short residence times provided little degradation of the substances in the course of the experiments. Comparisons with experimental results of other workers have been presented. The experimental critical constants of alkylnaphthalenes have been compared with those calculated by the group-contribution methods of Wilson and Jasperson and Marrero and Gani

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   C 89


    Critical properties of some tetraalkoxysilanes and tetraalkoxytitaniums with branched alkyl radicals [Электронный ресурс] / E. D. Nikitin, A. P. Popov, Yu. G. Yatluk, V. A. Simakina // Fluid Phase Equilibria. - 2012. - Vol.331. - P1-5

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
BRANCHED ALKYL RADICALS -- CRITICAL PROPERTIES -- TETRAALKOXYSILANES
Аннотация: The critical pressures and the critical temperatures of tetraisopropoxytitanium, tetra-tert-butoxytitanium, and tetraisopropoxysilane have been measured. The decomposition of the substances studied begins at temperatures below their critical ones. A pulse-heating method which allows measuring the critical properties of thermally unstable compounds has been used. The times of heating from the beginning of a pulse to the moment of reaching the critical temperature were from 0.03 to 1 ms. The short residence times provided little degradation of the substances in the course of the experiments. The critical constants of tetraalkoxytitaniums and tetraalkoxysilanes with branched and straight alkyl chains have been compared. The experimental critical constants of tetraalkoxytitaniums and tetraalkoxysilanes have also been compared with those calculated using various group-contribution methods

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   N 64

    Nikitin, E. D.
    Critical point measurement of ferrocene and some of its derivatives [Электронный ресурс] / E. D. Nikitin, A. P. Popov // Fluid Phase Equilibria. - 2012. - Vol.324. - P13-16

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
1-ACETYLFERROCENE -- BENZOYLFERROCENE -- FERROCENE
Аннотация: The critical temperatures and the critical pressures of ferrocene, . n-butylferrocene, benzoylferrocene, and 1-acetylferrocene have been measured. All the compounds studied begin to decompose at temperatures below their critical points. A method of pulse heating applicable to thermally unstable compounds has been used. Residence times were from (0.03 to 1.0). ms, which resulted in little decomposition of the substances in the course of measuring. The contributions of the groups Fe. CH and Fe. C for the estimation of the critical properties of ferrocene derivatives by the method of Marrero and Gani have been determined from the experimental data

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10.

11.

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   C 89


    Critical Temperatures and Pressures of Some Tetraalkoxytitaniums / E. D. Nikitin, A. P. Popov, Yu. G. Yatluk, V. A. Simakina // Journal of Chemical & Engineering Data. - 2010. - Vol.55, №1. - С. 178-183

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL PRESSURES -- CRITICAL TEMPERATURES -- TETRAALKOXYTITANIUMS
Аннотация: The critical pressures and the critical temperatures of nine tetraalkoxytitaniums, Ti[O(CH2)nH]4 with n = 2 to 10, have been measured. All of the substances studied begin to decompose at temperatures below their critical points. The method of pulse heating applicable to thermally unstable compounds has been used. Residence times were from (0.03 to 0.46) ms, which resulted in little decomposition of the substances during measuring. The contributions of the titanium(IV) atom in the group contribution methods of Constantinou and Gani and Marrero and Gani have been calculated from the experimental data. The critical pressures and temperatures of tetraalkoxytitaniums have been estimated by these methods

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12.

13.

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   N 64

    Nikitin, E. D.
    Vapor-liquid critical properties of some tetraalkoxysilanes [Текст] / E. D. Nikitin, A. P. Popov, V. A. Simakina // Journal of Chemical & Engineering Data. - 2008. - Vol. 53, № 6. - С. 1371-1374

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
VAPOR-LIQUID
Аннотация: The critical pressures and the critical temperatures of ten tetraalkoxysilanes (tetraalkyl esters of silicic acid) Si[O(CH2)nH]4 with n = 1 to 10 have been measured. All the substances studied begin to decompose at temperatures below their critical points. The method of pulse-heating applicable to thermally unstable compounds has been used. Residence times were from (0.03 to 1) ms, which resulted in little decomposition of the substances during measuring. The experimental critical properties of tetraalkoxysilanes have been compared with the values estimated by the group-contribution methods of Lydersen and Nannoolal et al

\\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2008, v.53, p. 1371.pdf
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14.

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   Н 62

    Никитин, Е. Д.
    Критические свойства некоторых ароматических соединений [] / Е. Д. Никитин, А. П. Попов // Метастабильные состояния и фазовые переходы : сб. науч. тр. / Ин-т теплофизики УрО РАН. - 2008. - Вып.9. - С. 160-168. - Библиогр.: с. 167-168 (21 назв.) . - ISBN 5-7691-1945-4

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
МЕТОД ИМПУЛЬСНОГО НАГРЕВА -- ФТАЛАТЫ

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15.

16.

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
МЕТОД ИМПУЛЬСНОГО НАГРЕВА -- ФТАЛАТЫ

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17.

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   N 64

    Nikitin, E. D.
    Critical Point Measurements for n-Alkyl Benzoates (C8 to C13) [Текст] / E. D. Nikitin, A. P. Popov, Yu. G. Yatluk // Journal of Chemical & Engineering Data. - 2007. - Vol. 52, № 4. - С. 1336-1339

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ALKYL BENZOATES
Аннотация: The critical temperatures and critical pressures of six n-alkyl benzoates C6H5COO(CH2)nH with n = 1 to 6 have been measured. All the substances are thermally unstable at their critical points. The method of pulse-heating of a wire probe placed into the liquid under study has been used. Residence times are from (0.03 to 1) ms, which results in little decomposition of the liquid in the course of measuring. The experimental critical properties of alkylbenzoates have been compared with the values estimated by the group contribution methods of Constantinou and Gani and Marrero and Gani. ??

\\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2007, v.52, p.1336.pdf
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18.

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   N 64

    Nikitin, E. D.
    Using the phenomenon of liquid superheat to measure critical properties of substances / E. D. Nikitin, A. P. Popov // Journal of Engineering Thermophysics. - 2007. - Vol.16, №3. - С. 200-204

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL TEMPERATURES -- R1(CH2)nR2
Аннотация: A method to measure the critical temperature and critical pressure of substances, in particular, thermally unstable ones, is briefly described. The method is used to measure the temperature of attainable superheat of liquids with the help of a wire probe heated by electric current pulses. As the pressure increases, the temperature of attainable superheat tends to a critical temperature. The duration of the heating pulses is from 0.03 to 1 ms. A list of about 130 substances for which measurements of the critical properties were made is presented. The results of these measurements confirmed the scaling form of the relation between the critical constants of substances consisting of long chain molecules and the number of molecular units. Two methods to extrapolate the experimental data for the critical properties of the initial members of homologous series to heavier polymer homologs are proposed. One of the methods is based on the equation of state for the fluid of chain molecules. In this method, the extrapolating equations are power series in n, where n is the number of main units in a chain molecule. In the other method, the hypothesis of functional self-similarity and the presentation of scaling behavior of the critical constants of long chain molecules are used. Homologous series with the general formula R1 (CH2)nR2, where R1 and R2 are different end groups, are considered. We obtain equations to calculate, with good accuracy, the critical temperature and critical pressure of any member of any homologous series with the molecule structure R1(CH2)nR2 if they are known for one compound belonging to this series

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19.

20.

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   N 64

    Nikitin, E. D.
    Vapor-Liquid Critical Properties of Phenol and (C8 to C10)Phenylalkanols [Текст] / E. D. Nikitin, A. P. Popov, Yu. G. Yatluk // Journal of Chemical & Engineering Data. - 2007. - Vol. 52, № 1. - С. 315-317

ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
VAPOR-LIQUID
Аннотация: The critical pressures and temperatures of phenol and three phenylalkanols C6H5(CH2)nOH with n = 2 to 4 have been measured. These substances are thermally unstable at their critical points. The pulse-heating method with ultralow residence times has been used. Residence times are from (0.03 to 1) ms. The experimental critical properties of phenol and phenylalkanols have been compared with the values calculated using the group-contribution methods by Constantinou and Gani and by Marrero and Gani

\\\\Expert2\\NBO\\Journal of Chemical and Engineering Data\\2007, v.52, p.315.pdf
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