银的一种回收或提纯方法包括(a)保证银呈AgCl形式;(b)在外加金属或NH_4Cl盐类存在的情况下溶解AgCl于DMSO中,所以AgCl溶解呈二氯银酸盐;(c)分离任何未溶解的固体;(d)加水和甲醇从溶液中沉出净化了的AgCl;及(e)分离AgCl沉淀。在作业(b)中,最好用DMSO/H_2O混合剂,此混合剂含(?)3g/l的水。附加的氯化物盐类最好是NaCl或CaCl_2。此法特别适合从工业、化学及摄影残渣中回收Ag,而得到高纯度的AgCl。 A method of recovery or purification of silver includes (a) ensuring that the silver is in the form of AgCl; (b) dissolving AgCl in DMSO in the presence of additional metals or NH_4Cl salts, so that AgCl is dissolved in the form of dichloro-silver salts; (c) ) Separating any undissolved solids; (d) precipitating purified AgCl from the solution with water and methanol; and (e) isolating the AgCl precipitate. In operation (b) it is advisable to use a DMSO / H 2 O mixture containing 3 g / l water. The additional chloride salts are preferably NaCl or CaCl 2. This method is particularly suitable for the recovery of Ag from industrial, chemical and photographic residue to obtain high purity AgCl.