Solvent extraction of copper and ammonia fromammoniacal solutions using sterically hindered β-diketone

来源期刊：中国有色金属学报(英文版)2010年第10期

论文作者：胡慧萍 刘春轩 韩雪涛 梁啟文 陈启元

文章页码：2026 - 2031

Key words：ammoniacal solution; 4, 4-dimethyl-1-(4-dodecylphenyl)-1, 3-pentanedione; copper; solvent extraction

Abstract: Extraction of copper and ammonia from Cu²⁺-NH₃-Cl^--H₂O solution using laboratorialy synthesized sterically hindered β-diketone (4,4-dimethyl-1-(4-dodecylphenyl)-1,3-pentanedione) was studied. The effects of the copper concentration, the total ammonia concentration, the initial pH in the aqueous phase, the phase ratio, and the temperature on copper extraction ratio and ammonia extraction in loaded organic phase were investigated using this sterically hindered β-diketone. Under the conditions of temperature 25 °C, contact time of two phases 30 min, phase ratio 1:1, concentration of copper 3 g/L, concentration of total ammonia 3 mol/L, aqueous pH 8.43, and the concentration of β-diketone in organic phase 20% (volume fraction), ammonia in aqueous phase is much lower to be extracted by organic phase (just 14.5 mg/L), while the extraction rate of copper is 95.09%.