【摘要】 本文研究了用2-乙基己基膦酸单（2-乙基己基）酯（HEHEHP）从盐酸介质中对氯化镓萃取的机理。观察了萃取时间、萃取剂的浓度、水相中的酸度及镓离子的浓度对萃取分配比的影响。寻找合适的反萃液。在pH1.9～2.4范围内,Ga（Ⅲ）萃取的分配比与有机相中[HEHEHP]₂浓度的平方成线性关关系,反比于水相中氢离子浓度的平方,形成萃合物GaCl（HA₂）₂,萃取反应的表观平衡常数K=0.280（15℃.μ=0.025）。更多还原

【Abstract】 In this paper, the solvent extraction of gallium chloride with 2-ethylhexyl 2-ethylhexyl phosphonate （HEHEHP） dissolved in benzene as diluent has been investigated. The extractability of gallium chloride has been determined as functions of extraction time, extractant concentration, acidity and gallium concentration. The suitable back-extraction condition has also been found. In the pH range of 1.9～2.4, the composition of the extract is Ga（HA₂）₂Cl. The relation between the pH_1/2 value of solvent extraction and extractant concentration is represented as pH_1/2=1.08-log[（HA）₂]_（o） At constant ion strength （μ=0.025） and temperature （15℃） the equilibrium constant K is equal to 0.280.更多还原