1. Tarzicius, K. and Milan, S.Method of water-free magnesium chloride preparation [P]. US Patent 252011, 1987.
2. Boyum, O.Anhydrous magnesium chloride production. US Patent 3742100, 1973.
3. Belchetz, A.Production of anhydrous magnesium chloride. US Patent 2381994, 1945.
4. Eisele, J. A.; Bauer, D. J.Method for dehydrating metal chlorides. US Patent 4105747, 1978.