Molten lithium nitrate-potassium nitrate eutectic: The reaction of magnesium compounds
1989; Elsevier BV; Volume: 145; Linguagem: Inglês
10.1016/0040-6031(89)85142-1
ISSN1872-762X
Autores Tópico(s)Molten salt chemistry and electrochemical processes
ResumoAnhydrous and hydrated magnesium sulphate reacted as a Lux-Flood acid in molten lithium nitrate-potassium nitrate eutectic from 400 °C with precipitation of magnesium oxide. Stabilization to above 500 °C occurred with added sulphate but a lower temperature reaction took place with added sodium hydroxide. The solubility of magnesium sulphate was determined up to 400 °C and shown to be nearly an order of magnitude less than that of potassium sulphate. Magnesium nitride reacted only superficially with pure nitrate melt but reacted faster in melts containing added sodium hydroxide, magnesium oxide being the final product in both cases. In acidic melts (K2S2O7 or K2Cr2O7 added) reaction was complete with soluble magnesium being formed initially. Thermogravimetry of magnesium oxide in a hydroxide-containing melt suggested that magnesium hydroxide may have been an intermediate.
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