中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (5): 79-81.

• 研究简报 • 上一篇    下一篇

MgCO3·3H2O水热分解产物及其组成

翟学良, 周相廷, 李美玲   

  1. 河北师范大学化学系 石家庄 050016
  • 收稿日期:1995-11-15 修回日期:1996-06-17 出版日期:1996-10-10 发布日期:1996-10-10
  • 基金资助:
    河北省自然科学基金

Hydrothermal Decomposition Products of Nesquehonite and Their Composition

Zhai Xueliang, Zhou Xiangting, Li Meiling   

  1. Department of Chemistry, Hebei Normal University, Shijiazhuang 050016
  • Received:1995-11-15 Revised:1996-06-17 Published:1996-10-10 Online:1996-10-10

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摘要： MgCO3·3H2O是工业生产碱式碳酸镁(Mg5(CO3)4(OH)2·4H2O)的中间产物,其水热分解过程及产物物相的研究,将有助于工艺条件的选择和产品含镁量的控制.我们选择较低温度,使MgCO3·3H2O缓慢分解,精确考察其组成与形态变化.

关键词: MgCO3·3H2O, Mg5(CO3)4(OH)2·8H2O, Mg5(CO3)4(OH)2·5H2O, 水热分解, 中间体

Abstract: The hydrothermal decomposition process of nesquehonite and the effects of decomposition conditions on the composition of products have been studied. The nesquehonite decomposes quickly in water. It first decomposes into protohydromagnesite, then dypingite appears in a mixture with protohydromagnesite, and finally the hydromagnesite is produced;i. e. via a two-intermediate path. It is a result different from those observed in other studies and may have some guiding significance for the actual production.

Key words: nesquehonite, protohydromagnesite, dypingite, hydrothermal decomposition, intermediate

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