Inorganic Chemicals Industry ›› 2021, Vol. 53 ›› Issue (4): 81-85.doi: 10.11962/1006-4990.2020-0289

• Environment·Health·Safety • Previous Articles     Next Articles

Study on enrichment process of rhodium from rhodium containing solution by sodium sulfide precipitation

He Xiaoying1,Li Chen2(),Wang Pengfei2,Jiang Lingyun2,Zang Jiazhong2,Wu Qing3   

  1. 1. Yinchuan University of Energy,Yinchuan 750100,China
    2. CenerTech Tianjin Chemical Research and Design Institute Co.,Ltd.
    3. China National Offshore Oil Co.,Ltd.
  • Received:2020-10-25 Online:2021-04-10 Published:2021-04-23
  • Contact: Li Chen E-mail:lichen9007@163.com

Abstract:

Sodium sulfide was used as precipitant to precipitate and enrich rhodium metal from rhodium containing strong acid aqueous solution.Many factors affecting the rhodium precipitation yield were determined through experiments,such as the amount of precipitant,precipitation temperature,feeding speed of the precipitant of sodium sulfide,aging time and stirring speed.The results showed that when amount-of-substance of the precipitant of sodium sulfide and rhodium was 10,precipitation temperature was 100 ℃,adding speed of sodium sulfide was 5 mL/min,aging time was 1 h and stirring speed was 600 r/min,the yield of rhodium precipitation reached the maximum.The highest yield of rhodium precipitation was more than 99%.After enrichment,the rhodium content in the solution was less than 1 mg/kg and the effect of rhodium enrichment was obvious.

Key words: sulfide precipitation, rhodium containing solution, rhodium recovery

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