Thermodynamic modeling for solvent extraction of metals divalent in sulphate media using D2EHPA

Química Nova

Cunha, Osvaldo Galvão Caldas da¹  Ximenes, Dalton de Sousa¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Sousa Junior, Clenilson da Silva¹  Centro de Tecnologia Mineral, Rio de Janeiro, Brasil¹  Nascimento, Marisa¹  Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro, Brasil¹  Nascimento, Karina Rodrigues Paiva Ranauro do¹ 

关键词: modeling;    solvent extraction;    divalent metals.;   

DOI  :  10.1590/S0100-40422012000200013

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The extraction of divalent metals (Mn2+, Ni2+, Co2+ and Cu2+) in the system MSO4 - H2SO4 - H2O - D2EHPA in isoparaffin (17/21) was studied by a thermodynamic model based on chemical equilibria with mass and charge balance equations. The activity coefficients of all solutes in the aqueous phase were calculated by Davies equation. By applying this model, the equilibrium concentrations of solutes were calculated from de concentration of divalent metals and pH. The predicted distribution coefficients for the divalents metals were in good agreement with experimental results.

【 授权许可】

Unknown