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Abstract
Currently, there is a growing demand for lanthanides production technology to satisfy many characteristics economically and industrial activities. In this respect, the primary goal of this thesis was oriented to elaborate a reliable and reproducible method for separation and subsequent production of light lanthanide elements (La, Ce, Nd and Sm) from Egyptian rocks (monazite) because of their great importance in industry.
Combination of wet chemistry based ion exchange chromatography and advanced detection instrumentation to get sufficient separation and measurement of lanthanide elements has been described. Simi-automated method including ion chromatographic column separation and fully automated post column derivatization measuring system was undertaken.
The optimized procedures were designed to characterize the separation process based on the difference in equilibrium constant of the investigated lanthanide elements between the ion exchange resin of and the mobile phase that containing the complexing agent. The separation efficiency of the analytical column (Dewex-50) was experimentally quantified by different complexing agent including oxalic acid, citric acid and sodium hexa meta phosphates.
The obtained results show a promising method for separation of La, Ce, Nd and Sm using 0.1M citric acid. Separation of La, Ce, Nd and Sm by oxalic acid represent less sufficient elution process and hence less separation efficiency. Finally, the separation of La, Ce, Nd and Sm by citric acid reflects a promising method for production of the four important light lanthanide elements.
Production of lanthanide elements on a large scale is an application of the ion exchange chromatography technique, whereas the recovery of individual rare earth metal with high degree of purity is available.