C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/260
C22B 26/22 (2006.01) C01F 5/00 (2006.01) C01F 5/20 (2006.01)
Patent
CA 1181243
METHOD FOR LEACHING MAGNESIUM FROM MAGNESIUM HYDROXIDE-CONTAINING COMPOSITION Abstract of the Disclosure A method for leaching magnesium from a magnesium hydroxide-containing composition, especially a mineral, which comprises contacting said composition with an aqueous solution of an ammonium salt whose corresponding magnesium salt is soluble in said aqueous solution to thereby produce said soluble magnesium salt; separating said aqueous solution from said composition; and transforming the magnesium of said soluble magnesium salt into an insoluble magnesium compound. The method is particularly useful for leaching magnesium from brucite-containing chrysotile asbestos fibers, to yield both a magnesium compound and brucite-free, dispersed chrysotile fibers.
397469
Carey Canada Inc.
Gowling Lafleur Henderson Llp
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