Recovery of molybdenum from spent catalyst leach solutions by solvent extraction with LIX 84-I
Recovery of molybdenum from spent catalyst leach solutions by solvent extraction with LIX 84-I
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使用 LIX 84-I 进行溶剂萃取从废催化剂浸出溶液中回收钼
DOI：
10.1016/j.seppur.2010.06.018
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
P. Parhi
中科院分区：
文献类型：
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作者：
K. Park;H. Kim;P. Parhi
将废催化剂烘烤浸出过程中得到的浸出液（10g/L Mo、27g/L Al、2.0g/L Ni）通过LIX 84-I采用溶剂萃取法回收Mo(VI)。检查了各种基本变量的影响，例如 pH、LIX 84-I 的浓度、不同的剥离试剂、相比和稀释剂。使用 40% LIX 84-I、pH 0.5 的水溶液和相比 O:A=1:1，构建了两阶段 McCabe-Thiele 图，显示 Mo 萃取率为 99.9%，没有 Ni 和 Al 的共萃取。 6 周期逆流模拟 (CCS) 研究证实了这一点。使用 1M NH4OH+1M (NH4)2CO3 的混合物对 Mo(VI) 的汽提进行定量。反萃等温线研究得到的逆流模拟条件（三阶段，相比O:A=5:1）进一步归因于反萃溶液中Mo(VI)浓度的富集（5倍）。红外光谱分析证实了萃取过程中形成的稳定络合物 MoO2R2 支持阳离子交换机制。
The leach liquor (10g/L Mo, 27g/L Al, 2.0g/L Ni) obtained from the baking and leaching process of spent catalyst was treated using solvent extraction to recover Mo(VI) by LIX 84-I. The influence of various basic variables such as pH, concentration of LIX 84-I, different stripping reagents, phase ratio and diluents, was examined. Using 40% LIX 84-I with the aqueous solution of pH 0.5 and a phase ratio O:A=1:1, a two-stage McCabe–Thiele plot was constructed which showed 99.9% of Mo extraction with no co-extraction of Ni and Al. This was confirmed by a 6-cycle counter current simulation (CCS) study. The stripping of Mo(VI) was quantitative using a mixture of 1M NH4OH+1M (NH4)2CO3. The counter current simulation condition (three stages, phase ratio O:A=5:1) obtained from the stripping isotherm study further attributes to the enrichment (5 times) of Mo(VI) concentration in the strip solution. The stable complex MoO2R2formed during extraction which supports the cation exchange mechanism, was confirmed by IR spectral analysis.