| 摘要 |
PURPOSE:To separate high purity nickel 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 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 and ferric chloride as principal components is produced. Gaseous chlorine is allowed to be absorbed in the spent etching soln. to deposit nickel chloride crystals and this nickel chloride is separated and recovered. |
