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一、前言钯铱合金广泛用于航空、电器等工业。加工及使用过程中的废归合金材料(钯铱10,钯铱18及废钯)必须加以回收。钯铱合金废料分离提纯方法国外未见具体资料报导。1963～1964年间,我所曾对该合金废料进行过分离提纯研究。其基本方法是将废料用王水溶解,浓缩至糖浆状,加浓硝酸使钯呈二氯化钯结晶,用玻砂漏斗过滤,浓硝酸洗涤与铱分离。洗液与母液合并,用硫化法精制铱。二氯化钯结晶用浓盐酸溶解后用氨络合法精制钯。经实验表明:用二氯化钯法分离钯和铱,劳动条件差,大批量生产更难于进行,后来我们根据铱被氨水络合后用盐酸酸化而不被沉淀的原理,采用了氨络合——盐酸酸化法分离钯和铱,从而使流程大为简化,劳动条件大大改善。钯继续用氨络合法精制,铱
I. Introduction Palladium Iridium alloy is widely used in aviation, electrical appliances and other industries. Waste alloy materials (palladium iridium 10, palladium iridium 18 and waste palladium) during processing and use must be recycled. Palladium-iridium alloy waste separation and purification methods abroad no specific information reported. From 1963 to 1964, I had conducted a study on the separation and purification of the alloy scrap. The basic method is to use waste water to dissolve with aqua regia, concentrated to syrup, add concentrated nitric acid palladium palladium dichloride crystallization, filtration with a glass funnel, concentrated nitric acid was washed with iridium separation. Lotion combined with the mother liquor, with sulfur curing iridium. Palladium dichloride was crystallized with concentrated hydrochloric acid and purified by ammonia complexation. Experiments show that: Palladium and palladium with palladium dichloride separation, poor working conditions, mass production is more difficult to carry out, and later we based on the complexation of ammonia with hydrochloric acid after acidification without precipitation principle, the use of ammonia complexation - Hydrochloric acid separation of palladium and iridium, so that the flow is greatly simplified, working conditions greatly improved. Palladium continue with ammonia complex law refined, iridium