| Autor: |
Kareeva, Anar, Besterekov, Uilesbek, Abdurazova, Perizat, Nazarbek, Ulzhalgas, Pochitalkina, Irina, Raiymbekov, Yerkebulan |
| Předmět: |
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| Zdroj: |
International Journal of Chemical Reactor Engineering; Aug2022, Vol. 20 Issue 8, p805-814, 10p |
| Abstrakt: |
The article presents the results of studies of the process of obtaining NPK fertilizer from low-grade phosphate raw materials with P2O5 of about 18%. Phosphate raw materials were leached with a mixture of nitric-phosphoric acids with the addition of potassium carbonate, which serves as a source of potassium in the final product. The main parameters determined were the content of the main nutrients P2O5:N:K2O, temperature and time of the leaching process. According to the graphical method, the "apparent" activation energy of the heterogeneous process is found, which is equal to 3.8 kJ/mol indicates the intradiffusion nature of the process. Methods of chemical analysis, scanning electron microscopy and XRD analysis were used for a comprehensive study of raw materials and final products. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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