| 摘要 |
PURPOSE:To separate nickel chloride and ferrous chloride from a spent etching soln. at a high rate of recovery by allowing gaseous chlorine to be absorbed in the spent etching soln. contg. a nickel salt, ferrous chloride and ferric chloride as principal components. CONSTITUTION:When a metallic plate consisting essentially of nickel and iron is etched with an etching soln. contg. ferric chloride as a principal component, a spent etching soln. contg. a nickel salt, ferrous chloride and ferric chloride as principal components is produced. Gaseous chloride is allowed to be absorbed in the spent etching soln. to deposit nickel chloride and ferrous chloride crystals and these crystals are separated and recovered. |
