Model-Based Comparison of Batch and Continuous Preparative Chromatography in the Separation of Rare Earth Elements
作者： Niklas Andersson , Hans-Kristian Knutson , Mark Max-Hansen , Niklas Borg , Bernt Nilsson
DOI: 10.1021/IE5023223
关键词: Europium 、 Batch processing 、 Multicolumn countercurrent solvent gradient purification 、 Scientific method 、 Neodymium 、 Rare earth 、 Yield (chemistry) 、 Process engineering 、 Materials science 、 Chromatography 、 Samarium
摘要: The demand for rare earth elements (REEs) is growing, while the future supply uncertain. Their unique electronic characteristics make them irreplaceable, and commercial value of pure fractions high. A model-based simulation study presented that compares batch chromatography with twin-column MCSGP (multicolumn countercurrent solvent gradient purification) process ion-exchange four-component system neodymium, samarium, europium, gadolinium. last three components are considered products individual purity requirements 99%. has been shown to be a good alternative regarding modifier consumption productivity since it enables internal recycling achieve high purities. new cut strategy applied where subfractions taken from each outlet. Two multiobjective optimizations yield, productivity, objectives show better than chromatography.
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