A new technique of magnesia electrolysis from bischofite in Qinghai salt lakes was investigated experimentally. Magnesia was prepared by ammonia processing. On an electrolysis cell of about 100 A capacity at 700degree...A new technique of magnesia electrolysis from bischofite in Qinghai salt lakes was investigated experimentally. Magnesia was prepared by ammonia processing. On an electrolysis cell of about 100 A capacity at 700degreesC, magnesium metal was obtained with a current efficiency of 90.23% and a specific energy consumption of 11.5 kW(.)h. The new technique has the advantages of energy saving, high current efficiency and environmental amity.展开更多
A simplified supramolecule MgCl2.6（H2O） is used to investigate the dehydration process of bischofite crystal. The molecular structure is constructed from the crystal data, and retains its original structure after op...A simplified supramolecule MgCl2.6（H2O） is used to investigate the dehydration process of bischofite crystal. The molecular structure is constructed from the crystal data, and retains its original structure after optimization by the first principle calculation. The transition states of dehydration process from MgCl2.6（H2O） to MgCl2-4（H2O） and reformation to MgCl2.4（H2O） were also calculated. The results show that MgCl2.6（H2O） releases its two water molecules successively. We also disclose the recrystallization process of MgCl2.4（H2O）, which explains its disordered structure. This work will help to understand the dehydration process ofbischofite.展开更多
基金The work was financially supported by the National Science Foundation of China (20166003).
文摘A new technique of magnesia electrolysis from bischofite in Qinghai salt lakes was investigated experimentally. Magnesia was prepared by ammonia processing. On an electrolysis cell of about 100 A capacity at 700degreesC, magnesium metal was obtained with a current efficiency of 90.23% and a specific energy consumption of 11.5 kW(.)h. The new technique has the advantages of energy saving, high current efficiency and environmental amity.
文摘A simplified supramolecule MgCl2.6（H2O） is used to investigate the dehydration process of bischofite crystal. The molecular structure is constructed from the crystal data, and retains its original structure after optimization by the first principle calculation. The transition states of dehydration process from MgCl2.6（H2O） to MgCl2-4（H2O） and reformation to MgCl2.4（H2O） were also calculated. The results show that MgCl2.6（H2O） releases its two water molecules successively. We also disclose the recrystallization process of MgCl2.4（H2O）, which explains its disordered structure. This work will help to understand the dehydration process ofbischofite.
