| 加压碳化法制备碱式碳酸镁新工艺研究 |
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| 引用本文： | 张向京,赵飒,张志昆,郭欣欣,刘润静,胡永琪. 加压碳化法制备碱式碳酸镁新工艺研究[J]. 无机盐工业, 2011, 43(10): 39-41 |
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| 作者姓名： | 张向京 赵飒 张志昆 郭欣欣 刘润静 胡永琪 |
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| 作者单位： | 河北科技大学化学与制药工程学院，河北石家庄 050018 |
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| 摘 要： | 碱式碳酸镁是一种性能优良的填充剂和分散剂，目前主要采用白云石碳化法或苦土粉-硫酸-碳酸氢铵法生产，流程复杂，污染严重。研究了在加压条件下以氢氧化镁浆液和二氧化碳气体为原料制备碱式碳酸镁新工艺。考察了反应温度、反应时间、二氧化碳分压对产品质量的影响。采用扫描电子显微镜（SEM）、X射线衍射仪(XRD)和热重-差热分析仪（TG-DTA）对产品的形貌、晶体结构及热失重进行了表征。结果表明，在反应温度为120 ℃，二氧化碳分压为0.22 MPa，反应时间为3 h时，可得到纯度较高、形貌为规则的六方薄片状的产品。
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| 关 键 词： | 碱式碳酸镁 氢氧化镁 高压碳化 |
New process for preparation of hydromagnesite by carbonization at elevated pressure |
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| Zhang Xiangjing,Zhao Sa,Zhang Zhikun,Guo Xinxin,Liu Runjing,Hu Yongqi. New process for preparation of hydromagnesite by carbonization at elevated pressure[J]. Inorganic Chemicals Industry, 2011, 43(10): 39-41 |
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| Authors: | Zhang Xiangjing Zhao Sa Zhang Zhikun Guo Xinxin Liu Runjing Hu Yongqi |
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| Affiliation: | School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China |
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| Abstract: | Hydromagnesite is a kind of filler and dispersant with excellent performance,and now it is mainly produced from dolomite carbonization technology or magnesia-sulfuric acid-ammonium hydrogen carbonate method which both have complex process and serious pollution.A new process was proposed for preparation of hydromagnesite at elevated pressure with magnesium hydroxide slurry and CO2 gas as raw materials.Effects of reaction temperature,reaction time,and partial pressure of CO2 gas on the purity of product were ... |
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| Keywords: | hydromagnesite magnesium hydroxide carbonization at elevated pressure |
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