反应条件
sulfuric acid; methyllithium in sulfuric acid
byproducts: FeSO4, FeCl2; ore crushed, classificated; leaching with aq. H2SO4 6 and 3 times, recirculation of liquor, stirring, filtrating; cementation on Fe; liquor regenerated; Cu contaminated with Fe, Fe(3+), Al, As, P2O5, refining by electrolyis;