Metallurgical and Materials Transactions B

, Volume 44, Issue 2, pp 354–358 | Cite as

Preparation of Anhydrous Magnesium Chloride from Magnesium Chloride Hexahydrate

  • Zhimin Zhang
  • Xuchen Lu
  • Feng Pan
  • Yun Wang
  • Suping Yang
Article
First Online:

Abstract

A method was proposed for the preparation of high-purity anhydrous magnesium chloride by using magnesium chloride hexahydrate and ammonium chloride as raw materials, and alumina as covering agent. X-ray diffraction was employed to investigate the process. The mechanism involved in the process was proposed. The factors affecting the purity of anhydrous magnesium chloride were investigated. Dehydrated ammonium carnallite was formed in the process to facilitate the dehydration process. Alumina as covering agent can guarantee that the formation of high-purity anhydrous magnesium chloride was obtained. The content of magnesia in anhydrous magnesium chloride was 0.02 pct under the optimum conditions: molar ratio of ammonium chloride to dehydrated magnesium chloride was 2:1, thickness of alumina 1.3 cm, reaction temperature 723 K (450 °C), reaction time 1 hour, and the number of crystallized water 0.6 to 2.2.

Keywords

NH4Cl Ammonium Chloride Magnesium Chloride Dehydration Process Magnesia Content 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2012

Authors and Affiliations

  • Zhimin Zhang
    • 1
    • 2
  • Xuchen Lu
    • 1
    • 3
  • Feng Pan
    • 1
    • 2
  • Yun Wang
    • 1
    • 2
  • Suping Yang
    • 1
    • 2
  1. 1.State Key Laboratory of Multi-Phase Complex Systems, Institution of Process EngineeringChinese Academy of ScienceBeijingP.R. China
  2. 2.Graduate University of Chinese Academy of ScienceBeijingP.R. China
  3. 3.United Research Center for Resource and MaterialsWuhaiP.R. China

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