硫酸镁与碳酸钠反应制备碱式碳酸镁的研究

发布时间：2018-03-02 03:16

  本文关键词： 碱式碳酸镁 硫酸镁 碳酸钠 硫酸钠　出处：《无机盐工业》2017年09期 　论文类型：期刊论文

【摘要】：围绕七水合硫酸镁和碳酸钠为原料制备碱式碳酸镁,考察了复分解反应温度、热解温度、热解时间、反应物浓度、原料配比以及原料硫酸镁中加入硫酸钠等因素对硫酸镁转化率和产品结构形貌的影响。采用X射线衍射(XRD)、扫描电镜(SEM)对样品进行表征。结果表明:制备碱式碳酸镁的适宜条件为复分解反应温度为50℃、热解温度为85℃、热解时间为2 h、原料硫酸镁的浓度为0.3 mol/L、硫酸镁与碳酸钠物质的量比为1∶1.1;所得产品碱式碳酸镁为片状结构聚集的玫瑰花样棒状;原料硫酸镁中加入一定量硫酸钠对碱式碳酸镁的制备没有明显的影响。此外,设计了制备碱式碳酸镁的工艺,并实现了母液的循环利用。
[Abstract]:The basic magnesium carbonate was prepared from magnesium sulfate heptahydrate and sodium carbonate. The reaction temperature, pyrolysis temperature, pyrolysis time, concentration of reactants were investigated. The effects of the ratio of raw materials and the addition of sodium sulfate to magnesium sulfate on the conversion of magnesium sulfate and the structure and morphology of the product were studied. The samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the basic carbonate was prepared. The optimum conditions for magnesium decomposition are as follows: the reaction temperature is 50 鈩，

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