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本文采用高效、快速、节能的微波技术对Mg Cl2·6H2O进行分解,通过热重分析﹙TG﹚、滴定分析和X射线衍射分析﹙XRD﹚等方法考察微波功率和时间对Mg Cl2·6H2O失重率、Cl-/Mg2+摩尔比、微波分解温度的影响规律,并对Mg Cl2·6H2O的微波分解和热分解进行了能耗分析。结果表明:当微波功率恒定时,随着微波辐射时间的增加,Mg Cl2·6H2O的失重率先升高后趋于平缓,Cl-/Mg2+摩尔比先减小后趋于平缓,微波后样品温度先降低后升高,最后趋于平缓;当微波辐射时间恒定时,随着微波功率的增加,Mg Cl2·6H2O的失重率和微波后样品温度呈递增趋势,Cl-/Mg2+摩尔比呈递减趋势;相比传统热分解过程,Mg Cl2·6H2O微波分解节能、省时,降低成本,具有潜在的工业应用价值。
In this paper, Mg Cl2 · 6H2O was decomposed by high efficiency, rapid and energy-saving microwave technology. The effects of microwave power and time on the weight loss of MgCl2 · 6H2O were investigated by thermogravimetric analysis (TG), titrimetric analysis and X-ray diffraction analysis , Cl- / Mg2 + molar ratio and microwave decomposition temperature, and the energy consumption analysis of microwave decomposition and thermal decomposition of MgCl2 · 6H2O was carried out. The results showed that when the microwave power was constant, the weight loss of MgCl 2 · 6H 2 O first increased and then became gentle with the increase of microwave irradiation time. The molar ratio of Cl- / Mg 2 + first decreased and then became gentle. The microwave temperature Then decreased with the increase of microwave power, the weight loss rate of Mg Cl2 · 6H2O and the temperature of sample after microwave showed an increasing trend while the molar ratio of Cl- / Mg2 + showed a decreasing trend. Compared with the traditional thermal decomposition process, Mg Cl2 · 6H2O microwave energy-saving decomposition, saving time and reducing costs, with potential industrial applications.