Chemistry of inorganic compounds – Halogen or compound thereof – Binary compound containing metal
Patent
1975-10-29
1976-06-29
Stern, Edward
Chemistry of inorganic compounds
Halogen or compound thereof
Binary compound containing metal
423351, C01F 534
Patent
active
039668886
ABSTRACT:
Anhydrous magnesium chloride may be prepared from magnesium chloride hydrates by the following sequence of processing steps:
1. Dissolving the magnesium chloride hydrate in ethylene glycol to form a magnesium chloride hydrate solution.
2. Heating the thus-formed solution to remove all the water therefrom thereby forming a ethylene glycol anhydrous magnesium chloride solution.
3. Treating the water-free magnesium chloride-ethylene glycol solution with ammonia to form a magnesium chloride ammonia complex which precipitates from the ethylene glycol.
4. Removing the precipitate from the ethylene glycol and washing it with a low boiling solvent for ethylene glycol to remove any ethylene glycol entrained in the precipitate.
5. Heating the magnesium chloride ammonia complex to drive off the ammonia which leaves as a finished product completely anhydrous magnesium chloride.
REFERENCES:
patent: 3092450 (1963-06-01), Christensen
patent: 3352634 (1967-11-01), Buchmann
patent: 3594120 (1971-07-01), Bott et al.
Allain Ronald J.
Braithwaite David G.
Miller Robert A.
Nalco Chemical Company
Premo John G.
Stern Edward
Sufrin Barry W.
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