C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
53/260
C01F 5/30 (2006.01) C22B 3/00 (2006.01) C22B 26/22 (2006.01)
Patent
CA 1338732
Method for production of magnesium chloride, to be used for production of magnesium, by leaching of magnesite in hydro- chloric acid. A two-stage leaching process is used where in the first stage coarsly crushed magnesite lumps are dissolved by feeding hydrochloric acid. The reaction solution from the first stage is led to a second stage, where finely ground magnesite or hydrochloric acid is added to obtain approximate equivalence between magnesium and chlorine. To precipitate the impurities an excess of magnesium oxide or magnesium hydroxide is added in one or several purification stages.
571950
Baumann Hanne Merete
Mejdell Glýr Thorvald
Tveten Kjell Wallin
Fetherstonhaugh & Co.
Norsk Hydro A.s
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