Stabilizing the strengthening precipitates in aluminum-manganese alloys by the addition of tungsten

Fan, Yangyang; Makhlouf, Makhlouf M.

doi:10.1016/j.msea.2017.03.025

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…MnSO 4 , as a base manganese salt, is used in the preparation of various advanced manganese-based alloys and products [1][2][3][4]. The front drive system of the positive triumvirate of a battery's material (Ni-Cobalt Manganese Acid Lithium) requires high-purity MnSO 4 , where the major impurities include potassium, sodium, calcium and magnesium (the sum of the concentration of calcium and magnesium impurities is ≤0.05%) [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol

Chen

Wang

Ming³

et al. 2021

Metals

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In the process of preparing high-purity MnSO4 from industrial MnSO4 solution, it is difficult to remove Ca2+ and Mg2+ due to their closely similar properties. In this study, thermodynamic software simulation and experimental procedures were combined to remove Ca2+ and Mg2+ from industrial MnSO4 solution to obtain high-purity MnSO4. The simulation model was applied to predict the trend of the crystallization of different ions in the solution upon the addition of H2SO4, which revealed that, at a volume ratio of H2SO4 to MnSO4 solution of more than 0.2, MnSO4 started to crystallize and precipitate. The experimental results further verified the simulation results, and the yield of MnSO4 increased with the increasing ratio of H2SO4, while the removal rate of Ca2+ and Mg2+ decreased gradually. Keeping the economic aspect in mind, the 0.3 ratio of H2SO4 was selected at which the yield of MnSO4 reached 86.44%. The removal rate of Ca2+ and Mg2+ by recrystallization reached 99.68% and 99.17% respectively after six consecutive cycles. The recrystallized sample was washed twice with anhydrous ethanol (volume ratio of ethanol to MnSO4 solution of 0.5) and dried for 6 h at 120 °C, and the purity of MnSO4·H2O reached the battery grade requirements with the final yield as high as 80.54%. This study provides important guideline information for the purification of MnSO4·H2O from industrial MnSO4 solution via a cost-effective, simple and facile approach.

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Section: Introductionmentioning

confidence: 99%