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单词 Dow process
释义
Dow process

Chemistry
  • A method of extracting magnesium from sea water by adding calcium hydroxide to precipitate magnesium hydroxide. This process is named after Dow Chemical, who extracted magnesium in this way, from 1941.


Chemical Engineering
  • A process used to extract magnesium from seawater. Lime (calcium hydroxide) is used to react with magnesium chloride in the seawater to produce magnesium hydroxide and calcium chloride. The hydroxide is precipitated and filtered. It is then treated with hydrochloric acid, dried, and melted at 710°C. Electrolysis is used to produce the magnesium along with chlorine gas.


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