Recovery of cadmium from nickel-cadmium batteries via selective extraction with tributylphosphate (TBP)

Química Nova

Valverde Jr, Ivam Macedo¹  Cunha, José Waldemar Silva Dias da¹  Instituto de Engenharia Nuclear, Rio de Janeiro, Brasil¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Afonso, Júlio Carlos¹  Mantovano, José Luiz¹  Barandas, Ana Paula Mauro Gonçalves¹ 

关键词: cadmium;    TBP;    Ni-Cd batteries.;   

DOI  :  10.1590/S0100-40422007000300035

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work describes a recovery process of cadmium from spent nickel-cadmium batteries by a new hydrometallurgical route based on the selective extraction in hydrochloric acid medium with tributylphosphate (TBP), alone or dissolved in kerosene. The best results were obtained when TBP concentration was at least 75 vol%. Nickel extraction was negligible under these conditions. It was isolated after processing the rafinate through an anionic ion-exchange column. Final wastes generated are basically sodium chloride solutions, with no turbidity, color or heavy metals present in significant amounts.

【 授权许可】

Unknown