I.G. Farben process

In the I.G. Farben process magnesium hydroxide is calcined to the oxide and chlorinated in the presence of carbon to yield anhydrous magnesium chloride cell feed. The by-product chlorine from this process is recycled to the chlorinator. First developed by the I.G. Farben Industries from Germany in 1930 and currently running in China, Russia and the United States.