采用溴代十六烷基吡啶从碱性氰化液中萃取和富集钯、铂

中国有色金属学报, 2016, 26(11): 2449-2460.

采用溴代十六烷基吡啶从碱性氰化液中萃取和富集钯、铂

李荣 ^1, , 张金燕 ^2, , 陈慕涵 ^3, , 吴胜杰 ^4, , 刘燕 ^5, , 李金飞 ^6, , 黄章杰 ^7,

1.云南大学化学科学与工程学院,昆明,650091

2.云南大学化学科学与工程学院,昆明,650091

3.云南大学化学科学与工程学院,昆明,650091

4.云南大学化学科学与工程学院,昆明,650091

5.云南大学化学科学与工程学院,昆明,650091

6.云南大学化学科学与工程学院,昆明,650091

7.云南大学化学科学与工程学院,昆明,650091

基金项目: 云南省院士自由探索项目(2013HA010,2014HA010) 国家基础研究计划资助项目(2014CB643406) 云南省工业废水光催化处理工程研究中心计划项目 Project(51264038) supported by the National Natural Science Foundation of China Project(2014CB643406) supported by the Major State Basic Research Development Program of China Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater of Yunnan Province,China 国家自然科学基金资助项目(51264038) Project(2013HA010,2014HA010)supported by Academician Free Exploration Project of Yunnan Province,China

关键词：碱性氰化液 , 溴代十六烷基吡啶 , 钯 , 铂

Simultaneous extraction and preconcentration of palladium and platinum from alkaline cyanide solution by hexadecylpyridinium bromide

Keywords： alkaline cyanide solution , hexadecylpyridinium bromide , palladium , platinum

对使用溴代十六烷基吡啶(HPB)作为萃取剂,在碱性氰化液中同时萃取富集钯、铂进行考察,对影响萃取富集效率的各种因素:稀释剂种类、溴代十六烷基吡啶浓度、改性剂用量、相比、萃取时间、水相中Pd(Ⅱ)和Pt(Ⅱ)浓度及溶液的pH值进行研究.结果表明:使用溴代十六烷基吡啶浓度为0.05 mol/L,正辛醇含量为30％(体积分数),相比(O/A)为1∶5的有机相,在pH=10.5碱性氰化液中,5 min内能将Pd(Ⅱ)＜70 mg/L)和Pt(Ⅱ)＜60 mg/L)从水相转移至有机相,采用NH4SCN溶液反萃有机相中的Pd(Ⅱ)和Pt(Ⅱ),采用斜率法、红外和紫外光谱分析对萃取机理进行推测,该方法可运用于钯、铂浮选精矿氰化浸出液中Pd(Ⅱ)和Pt(Ⅱ)的萃取,富集倍数为15,回收率大于95％.

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