| Issue |
E3S Web Conf.
Volume 392, 2023
II International Conference on Agriculture, Earth Remote Sensing and Environment (RSE-II-2023)
|
|
|---|---|---|
| Article Number | 02036 | |
| Number of page(s) | 8 | |
| Section | Ecology, Environmental Protection and Conservation of Biological Diversity | |
| DOI | https://doi.org/10.1051/e3sconf/202339202036 | |
| Published online | 06 June 2023 | |
Study of Physico-Chemical Properties of Phosphorate Solutions
1 Namangan Institute of Engineering and Construction, Namangan, Uzbekistan
2 Yangiyer branch of Tashkent Chemical Technological Institute, Yangiyer, Uzbekistan
* Corresponding author: samadiy@inbox.ru
The results of studies of the physicochemical properties of extraction phosphoric acids containing magnesium in the presence of ammonium nitrate are presented. A decrease in the heat of vaporization in the H3PO4-H2O system was found in the range of acid concentrations of 20-30% and 37-45% P2O5. At an acid concentration of 20, 35% and 45% P2O5 there is a minimum electrical conductivity, while at a concentration of 30 and 40% P2O5, the electrical conductivity of solutions reaches a maximum value at temperatures of 25-45%, which is explained by structural changes occurring in the acid during dissociation and dimerization, depending on the concentration. The electrical conductivity of the H3PO4-H2O system decreases with the introduction of magnesium sulfate and ammonium nitrate. The regularity of the thickening of magnesium-containing acid is substantiated.
© The Authors, published by EDP Sciences, 2023
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