首页> 美国卫生研究院文献>The Scientific World Journal >Purification of Sulphate Leach Liquor of Spent Raneynickel Catalyst Containing Al and Ni by Solvent Extraction with Organophosphorus-Based Extractants
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Purification of Sulphate Leach Liquor of Spent Raneynickel Catalyst Containing Al and Ni by Solvent Extraction with Organophosphorus-Based Extractants

机译:有机磷基萃取剂的溶剂萃取法纯化含镍铝的阮内镍废催化剂的硫酸盐浸出液

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摘要

Solvent extraction (SX) separation of Al from Ni sulphate leach liquor (LL) of spent Raneynickel catalyst containing 0.12 M Al and 1.448 M Ni using organophosphorus extractants has been investigated. Optimization of process conditions includes aqueous pH, extractant concentration, phase ratio, and stripping. Comparison of Al extraction efficiency with 0.45 M extractant concentration for TOPS 99, PC 88 A, and Cyanex 272 at an equilibrium pH of 2.23 was 81.8%, 98.6%, and 75%, respectively. The corresponding coextraction of Ni was 0.65, 0.6, and 0.9. Among the three extractants screened, PC 88A showed better extraction efficiency for Al at lower pH values than the others. Using 0.45 M PC 88 A, extraction isotherm was obtained at an aqueous-to-organic (A : O) phase ratio of 1 : 1–3 and O : A ratio of 1 : 1–5, which predicted possible separation of Al in 2 stages at A/O ratio of 2. Quantitative stripping was achieved by H2SO4.
机译:研究了用有机磷萃取剂从含0.12 M Al和1.448 M Ni的阮内镍废催化剂的硫酸镍浸出液(LL)中溶剂萃取(SX)分离铝的方法。工艺条件的优化包括水溶液的pH值,萃取剂浓度,相比和汽提。在平衡pH为2.23时,TOPS 99,PC 88 A和Cyanex 272的Al提取效率与0.45 M提取剂浓度的比较分别为81.8%,98.6%和75%。 Ni的相应共提取为0.65、0.6和0.9。在筛选的三种萃取剂中,PC 88A在较低的pH值下显示出比其他萃取剂更好的Al萃取效率。使用0.45 M PC 88 A,水-有机(A:O)相比为1:1-3且O:A比为1:1-5时获得了萃取等温线,预示了铝可能在其中分离。 A / O比为2时分2个阶段。用H2SO4进行定量萃取。

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