Efficient Removal of Polyvalent Metal Impurities from KH2PO4 by Crystallization
| Autor: | I. Yu. Komendo, A. E. Dosovitskii, G. R. Allakhverdov, P. A. Volkov, A. L. Mikhlin |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science General Chemical Engineering Potassium Inorganic chemistry Metals and Alloys chemistry.chemical_element 010403 inorganic & nuclear chemistry Phosphate 01 natural sciences 0104 chemical sciences law.invention Inorganic Chemistry chemistry.chemical_compound Chromium chemistry law Aluminium Impurity Phase (matter) 0103 physical sciences Materials Chemistry Crystallization Titanium |
| Zdroj: | Inorganic Materials. 54:171-175 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168518020085 |
| Popis: | The separation factors of metal impurities for potassium dihydrogen phosphate crystallization from nonstoichiometric solutions have been experimentally determined. Based on the results obtained, a method has been proposed that makes it possible to obtain a material containing aluminum, iron, chromium, and titanium at a level of ~5 × 10–2 ppm by weight from commercially available raw materials. In this method, a KH2PO4 solution is purified due to partial crystallization of the macrocomponent, so that the above impurities are concentrated in the solid phase. The purified solution is then boiled down with KOH additions. |
| Databáze: | OpenAIRE |
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