Method for preparing high-purity platinum powder from platinum-rhodium alloy

• Main Authors: QIN XICHAO, YU ZHENG, LI XUEJIAO, LI ZHIHAI, WANG LAIBING
• Format: Patent
• Language: Chinese; English
• Published: 31.10.2023
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention provides a method for preparing high-purity platinum powder from a platinum-rhodium alloy. The method comprises the following steps: (1) dissolving the platinum-rhodium alloy with aqua regia; (2) adding a platinum coordination agent, precipitating platinum for the first time, and separating platinum and rhodium through a precipitation method to obtain a platinum salt 1; (3) dissolving the platinum salt 1 in a targeted manner to obtain a platinum solution; (4) oxidizing the platinum liquid and carrying out secondary platinum deposition to obtain platinum salt 2; and (5) carrying out reduction and acid treatment on the platinum salt 2 to obtain the ultra-high-purity platinum powder. The problems that in the prior art, ultra-pure platinum powder is difficult to purify, the requirement for raw materials is high, and steps are tedious are mainly solved. 本发明提供一种从铂铑合金中制备高纯铂粉的方法，包括如下步骤：(1)铂铑合金用王水溶解；(2)加入铂配位剂，铂第一次沉淀，通过沉淀法分离铂铑，得到铂盐1；(3)靶向溶解铂盐1，得到铂液；(4)铂液氧化进行二次沉铂，得到铂盐2；(5)铂盐2经还原、酸处理得到超高纯铂粉。主要解决现有技术中超高纯铂粉提纯