Sherritt-Gordon
Sherritt-Gordon : The Canadian company, Sherritt-Gordon Mines, has developed a number of hydrometallurgical leaching processes known by its company name. The essential feature of these processes is based on the observation of F. A. Forward that sulfide ores will dissolve in aqueous ammonia in the presence of oxygen. One such process is for leaching nickel from sulfide ores, using aqueous ammonia and oxygen under pressure. The hexammino nickel (II) ion is formed: NiS + 2O2 + 6NH3 + Ni(NH3)6 2+ + SO4 2-. (Check source for accuracy of chemical formula)
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