Recovery method of platinum

• Main Authors: CHEN, YI-WEN, LU, FANG-HSIEN
• Format: Patent
• Language: Chinese; English
• Published: 01.05.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention discloses a recovery method of platinum. According to the recovery method, a leaching liquor is firstly added into a Pt-containing waste liquid, and then a first solvent is added into a first liquid mixture consisting of the leaching liquor and the Pt-containing waste liquid for conducting a first solvent extraction. Subsequently, a second solvent is used to apply a second solvent extraction process to a second liquid mixture consisting of the first solvent and the first liquid mixture, and then an alkaline reducing agent is added into a third liquid mixture consisting of the second solvent and the second liquid mixture for activating the reduction of platinum ions in the third liquid mixture. After that, adding a first refining agent in to a fourth liquid mixture consisting of the alkaline reducing agent and the third liquid mixture, and subsequently adding a second refining agent in to a fifth liquid mixture consisting of the first refining agent and the fourth liquid mixture. In a las