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Synthesis of Stable Alkaline Ferrates (VI) by Dry Process: Quantitative and Qualitative Assessment |
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PP: 225-232 |
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doi:10.18576/ijtfst/120308
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Author(s) |
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Abdellatif El Maghraoui,
Abdelaziz Zerouale,
Mustapha Ijjaali,
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Abstract |
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| This article presents a new process for synthesizing ferrate VI alkali K2FeO4 with high yield and purity of 98.3 to 99.1%, stable for 12 months at a temperature around 30°C, by heating the mixture of Potassium peroxide K2O2 and Fe2O3 with a K/Fe ratio = 4 at a temperature of 560°C for 5 hours under a current of oxygen, under the most favorable conditions. This is much better than that synthesized by deferent synthetic routes. The synthesis of VI ferrates was carried out under different experimental conditions (the K/Fe ratio varies from 1 to 6, T varies from 200 – 750°C, time varies from 6 to 17h and product storage temperature varies from 20 to 40°C) in order to obtain an optimal yield of ferrate VI stable and of high purity as well as to minimize the cost and to facilitate their storage and their transport. The presence and quality of iron VI was confirmed in the phase obtained by XRD, IR spectrometry, UV spectrophotometry and by the volumetric titration method quantitatively and qualitatively. The degradation rate of iron VI after 12 months of storage at around 30°C was observed and determined by Mossbauer spectrometer, UV spectrophotometry and by the volumetric titration method.
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