C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/369, 53/374
C22B 15/00 (2006.01) C01G 3/00 (2006.01) C07F 1/00 (2006.01) C22B 3/26 (2006.01) C22B 3/30 (2006.01)
Patent
CA 1225243
ABSTRACT WINNING METAL FROM ORE Copper is won from chalcopyrite ore (copper/iron sulphide) containing Cu(II) and Fe(III), which respectively prefer square planar and octahedral co-ordination. A vapourised tetradentate (square-planar) Schiff base reagent is passed through a fluidised bed of oxidatively roasted chalcopyrite, and ignores the iron but forms a (volatile) copper complex. This is blown to a decomposition chamber containing a hot probe on which the complex decomposes, leaving the desired copper on the probe and liberating the Schiff base reagent for recycling.
445791
Cox Michael
Duke Phillip W.
Gray Michael J.
Gowling Lafleur Henderson Llp
National Research Development Corporation
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