Pd SEPARATION METHOD

• Main Authors: SUZUKI TAKAO, TAKEYAMA TOMOKIYO, IWAFUNE MITSUHIRO, SATO TAKAHIRO, SASAKI TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 16.10.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a Pd separation method in which Pd contained as a complex in organic waste liquid can be separated and recovered with simple treatment and efficiently at high purity.SOLUTION: Provided is a Pd separation method, which is a method in which, using an organic waste liquid containing mainly an organic solvent having a water content of less than 10 mass% as a liquid to be treated, Pd is selectively separated from the inorganic components contained in the liquid to be treated, and the method comprises a step of adding 10 equivalents or more of formic acid to Pd contained in the liquid to be treated, heating to a temperature in the range of 50 to 100°C in a state in which formic acid is mixed in the liquid to be treated to generate a precipitate, and subjecting the generated precipitate to solid liquid separation.SELECTED DRAWING: None 【課題】有機系排液中に錯体として含まれるＰｄを簡便な処理で効率よく高純度で分離回収することのできるＰｄの分離方法を提供する。【解決手段】 水含有量が１０質量％未満である有機溶媒を主とする有機系排液を被処理液として、当該被処理液中に含まれる無機成分の中からＰｄを選択的に分離する方法であって、前記被処理液に含有されるＰｄに対して１０当量以上のギ酸を添加し、前記被処理液にギ酸が混合されている状態にて、５０～１００℃の範囲の温度に加温することで、析出物を生成し、生成した析出物を固液分離すること工程を含むことを特徴とするＰｄの分離方法。【選択図】なし