ABSTRACT The effect of chloride ions on the copper extraction equilibria, the rate of extraction, copper/iron selectivity, and chloride extraction was studied for organic phases containing pure ketoxime (LIX 84-IC) and pure nonylaldoxime (LIX 860N-IC). In these systems, the used aqueous phase contained total chloride concentrations from 0 to 110 g/l. It was determined that the chloride ions in the aqueous solution had a large negative effect on the extraction equilibria for LIX 84-IC and a small effect for LIX 860N-IC. This deleterious effect is attributed to an increase in the hydrogen ion activity coefficient in the presence of chloride ions. The chloride accelerated the rate of copper extraction even though the reaction was fast in all the tested conditions. An increase in the temperature from 25°C to 35°C affected positively the extraction equilibria for LIX 84-IC.

中文翻译：

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使用 LIX 84-IC 和 LIX 860-IC 从硫酸盐-氯化物溶液中溶剂萃取铜

摘要 针对含有纯酮肟 (LIX 84-IC) 和纯壬醛肟 (LIX 860N-IC) 的有机相，研究了氯离子对铜萃取平衡、萃取速率、铜/铁选择性和氯化物萃取的影响。在这些系统中，使用过的水相含有 0 至 110 g/l 的总氯化物浓度。确定水溶液中的氯离子对 LIX 84-IC 的萃取平衡有很大的负面影响，对 LIX 860N-IC 的影响很小。这种有害影响归因于氯离子存在下氢离子活度系数的增加。尽管在所有测试条件下反应都很快，但氯化物加快了铜提取的速度。