This article was originally published with the title “ Extraction of Copper by an Acid Solution of Ferrous Chloride ” in SA Supplements Vol. 4 No. 95supp (October 1877), p. 1512 doi:10.1038 ...

Both ferrous chloride and ferric sulphate are significant by-products of other industrial processes, with low intrinsic production costs. In fact, transport costs can often be the major influence on ...