Publication: Investigation of ree and extraction efficiency via solvent extraction method from rare earth oxalate (reox)
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Date
2024-08-01
Authors
Nurul Ainin Sofhia Binti Abdul Raof
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Abstract
Solvent extraction is one of the methods that have been used to extract the rare earth elements (REE). Solvent extraction is often regarded as the most suitable commercial approach for separating rare earths because it can handle higher amounts of diluted pregnant liquors. This study aims to characterise and examine the rare earth elements found in rare earth oxalate (REOx), as well as to compare the extraction performance of various extractants for REE recovery. In this study, the REOx was calcined to obtain the rare earth oxide (REO) for solvent extraction experiment. The solvent extraction was performed using two different extractants which are DEHPA and Cyanex 923. The experiment was designed by Design of Experiment (DOE) using Minitab software. The parameters used in this experiment were types of extractant and concentration of extractant. From the study, it was found that the percentage of REE after calcination at 850 ºC was 90.58%. From solvent extraction, the highest extraction efficiency for DEHPA was 76.38% and 25.41% for Cyanex 923, both at concentration 10%. From the experiments, it can be concluded that the DEHPA is a good and effective extractant to extract REE.