摘要
Homogeneous(unseeded)precipitation of magnesium carbonate hydrates by the reaction of MgCl2 with Na2CO3 in supersaturated solutions between 273 and 363K was investigated.The compositions,morphologies and filtration characteristics of the precipitates were studied in detail.The magnesium carbonate hydrates obtained at 313K and in the range of 343-363K showed good morphologies and filtration characteristics.Magnesium oxides(MgO)with high purity(97.6%-99.4%)were obtained by calcining magnesium carbonate hydrates at 1073K.
Homogeneous （unseeded） precipitation of magnesium carbonate hydrates by the reaction of MgCl2 with Na2CO3 in supersaturated solutions between 273 and 363 K was investigated. The compositions, morphologies and filtration characteristics of the precipitates were studied in detail. The magnesium carbonate hydrates obtained at 313 K and in the range of 343-363 K showed good morphologies and filtration characteristics. Magnesium oxides （MgO） with high purity （97.6%-99.4%） were obtained by calcining magnesium carbonate hydrates at 1073 K.
基金
Supported by the National Natural Science Foundation of China （20876161） and the National Basic Research Program of China （2007CB613501, 2009CB219904）.
关键词
均相反应
碳酸镁
水合物
碳酸钠
氯化镁
沉淀碳酸钙
制备
温度
homogeneous precipitation, magnesium carbonate hydrates, magnesium oxide, filtration characteristic
