Anhydrous magnesium chloride

Sheehan, Gregory John, Wong, Fook-Sin, Hourn, Michael Matthew, Kodama, Manabu and Hughes, David (2000). Anhydrous magnesium chloride. 6,143,270.

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Creator Sheehan, Gregory John
Wong, Fook-Sin
Hourn, Michael Matthew
Kodama, Manabu
Hughes, David
Patent title Anhydrous magnesium chloride
Date of issue 2000-11-07
Patent owner The University of Queensland
Patent number 6,143,270
Country of origin United States
Language eng
Subjects 091407 Pyrometallurgy
291300 Metallurgy
Abstract/Summary Anhydrous magnesium chloride is prepared by a process in which hydrated magnesium chloride (10) is mixed in a vessel (11) with ethylene glycol (12). The mixture (13) is dehydrated in distillation columns (14, 15 and 16) with the dehydrated ethylene glycol magnesium chloride solution (20) pumped into a crystalliser (21) simultaneously with the separate addition of anhydrous ammonia gas (22) to the crystalliser (21). Prior to the introduction of reactants (20 and 22), the crystalliser (21) contains ethylene glycol saturated with ammonia. A crystalliser slurry of magnesium chloride hexammoniate (23) is continuously pumped from the crystalliser (21) into a pressure filter (24) where the crystals are washed with methanol saturated with ammonia (26). The washed crystals (27) are transferred to a fluidised bed calciner (28) where methanol is evaporated from the crystals at 120° C. and thereafter the crystals are calcined to anhydrous magnesium chloride at 450° C.

Document type: Patent
Collection: School of Mechanical & Mining Engineering Publications
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Created: Wed, 12 Apr 2006, 19:20:48 EST