从铂化合物制备尾液中回收超细铂粉的研究
Study on the recovery of ultrafine platinum powder from the tail solution of the preparation of platinum compounds
毕向光 1王文思 2余泽锦 2刘辉 2冯丰 2赵云昆 2余建民 3卿山4
作者信息
- 1. 昆明理工大学 冶金与能源工程学院,昆明 650093;昆明贵研催化剂有限责任公司,昆明 650106
- 2. 昆明贵研催化剂有限责任公司,昆明 650106
- 3. 昆明贵金属研究所,昆明 650106
- 4. 昆明理工大学 冶金与能源工程学院,昆明 650093
- 折叠
摘要
将不同的铂化合物制备尾液经过氯化铵沉淀,实现与其他杂质元素的分离,将铂转化为氯铂酸铵中间体,经液相化学还原得到超细铂粉.研究了中间体形态、(NH4)2PtCl6 溶液浓度、分散剂种类及加入量对铂粉粒度、比表面积、形貌的影响.结果表明,铂化合物尾液种类不影响超细铂粉的形貌及颗粒尺寸,以 PVP 为分散剂,硼氢化钠为还原剂,在优化条件下制备的铂粉平均粒度约150 nm,纯度 99.99%,直收率 97.8%,颗粒形貌均匀、分散程度高、比表面积及颗粒尺寸均符合超细铂粉国家标准,方法可用于从多种铂类化合物制备尾液直接制备超细铂粉.
Abstract
To separate platinum from other impurity elements,ammonium chloride was used to selectively precipitate platinum in the state of ammonium chloroplatinate from the tail solution containing different platinum compounds.And then ammonium chloroplatinate was reduced via a liquid phase chemical reduction method to produce ultrafine platinum powder.The effects of chemical species of the intermediate,the concentration of(NH4)2PtCl6 solution,the type and amount of dispersants on the particle size,specific surface area and morphology of platinum powder were investigated.The results show that the morphology and particle size of the obtained platinum powder are not affected by the type of the tail solutions,and the average particle size of the powder prepared under the optimized conditions is about 150 nm and the purity is 99.99%.Therefore,the method developed in this study can be used for directly preparing ultrafine platinum powder from the tail liquid from the production process of various platinum compounds.
关键词
铂类化合物/制备尾液/还原剂/超细铂粉Key words
platinum compounds/preparation of tail solution/reducing agent/ultrafine platinum powder引用本文复制引用
基金项目
云南省科技重大专项(202102AB080007)
出版年
2024
NETL
NSTL
万方数据