MAGNEZIUM, TITANIUM, RARE METALS, SEMICONDUCTORS | |
Название | Some physical and chemical properties water solutions of rhenate acid |
Автор | Poсhtarev A. N., Istrashkina M. V., Kalimulin V. S., Kartsev V. E. |
Информация об авторе | “Giredmet” Institute, Moscow, Russia: A. N. Poсhtarev, Head of Laboratory, e-mail: ANP1945@mail.ru |
Реферат | The article presents the results of experiments on determination of the boiling temperatures of rhenium acid at a pressure of 10,1 · 105 Pa in the range of concentrations of rhenium acid equaled 9.83–89.80% of the masses. The composition of the liquid and the vapor phase determined analysis of the solutions on the content of rhenium acid method of plasma emission spectroscopy. The dependence of the specific electric conductivity of solutions of rhenium acids at the temperature 25 oC in the range of concentrations of 1.43–88.76 % of the mass. HReO4. The experimental results are processed graphical method for concentration of rhenium acids 1.0–90.0% of the masses. It is shown, that the dependence of the electrical conductivity of rhenium acid is an extreme with a maximum value in the range of concentrations of 60.0–65.0% of the mass. HReO4. Defined maximum conductivity of rhenium acid, which amounted to 404.4 cm2/Ohm·EQ, as well as the calculated maximum conductivity of ions ReO4– , which amounted to 55.0 cm2/Ohm·EQ and the number of ion transfer ReO4– equals 0.136. The dependence of the viscosity solutions of rhenium acids at the temperature 250 oC in the range of concentrations of 1.0–90.0% of the mass. HReO4. Viscosity increases with increase in concentration of rhenium acid, reaching values of 35.5 g/cm·sec, at a concentration of rhenium acid 90% of the mass. According to experimental data determined the values of coef ficients A and B in the equation Jones – Dole, which amounted to 0.0088 11/2·mol1/2 and 0.127 1·mol–1, respectively. Calculated value of the coefficient for The Jonas ReO4– which was 0.058 1·mol–1 and effective molar volume of hydrated ion ReO4–, which amounted to 0.0285–0.0244 1·mol–1 depending on the concentration of rhenium acid in the solution. |
Ключевые слова | Rhenium acid, boiling temperature, composition of liquid phase, composition of steam phase, conductivity, maximum conductivity, viscidity, equalization of Jones – Dole |
Библиографический список | 1. Ryashentseva M. A., Minachev Kh. M. Reniy i ego soedineniya v geterogennom katalize (Rhenium and its compounds in geterogenous catalysis). Moscow : Nauka, 1983. 248 p. |
Language of full-text | русский |
Полный текст статьи | Получить |