Synthesis and Performance Study of H2SbBP and H2AdBP on the Ce (III) Liquid-Liquid Extraction Aim to the Separation of Rare Earth Elements in a Destruction Product of Bangka Monazite Concentrate

• Main Author: (NIM 10505056); Pembimbing: Prof. Dr. Buchari, DELVY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/13369
• Institution: Institut Teknologi Bandung

Rare earth element is a future and much sought material because of its big influence in technology development. Several efforts have been done to get rare earth elements with high purity from the mineral. 4-acyl-5-pyrazolone derivatives are well known as hard Lewis bases chelating ligand and have a strong affinity with hard Lewis acids, like lanthanoids. In this experiment, we synthesize two compounds of 4-acyl-5-pyrazolone derivatives, which are 4-adipoylbis(1-phenyl-3-methylpyrazolone-5) (H2AdBP) and 4-sebacoylbis(1-phenyl-3-methylpyrazolone-5) (H2SbBP). H2SbBP, product of synthesis, colored yellow, yield before purification is 169.57%, melting point 127.8-132oC, soluble in chloroform, and show a characteristic peaks of pyrazolone ring (1556,55 cm-1) and chelate ring (640,37 cm-1; 507,28 cm-1) on IR spectrum. H2AdBP, product of synthesis, colored brown, yield before purification is 69.42%, melting point 190.3-197.6oC, soluble in chloroform, and show a characteristic peaks of pyrazolone ring (1560,41 cm-1) and chelate ring (636,51 cm-1; 507,28 cm-1) on IR spectrum. As an extractant in liquid-liquid extraction of cerium (III), H2SbBP ligand shows better performance than H2AdBP ligand. Increase of ligands concentration and pH make an increase of ligands performance as extractants. Chelate complex of ligand-metal results from interaction of a Ce3+ with three B-diketone donor sites in H2SbBP or H2AdBP ligands. Extraction efficiency was studied with determining highest selectivity (a) of Ce and Y, obtained when using H2AdBP ligand with extraction pH 4. In this experiment, we also destruct monazite mineral with NaOH, 1:1 (w/w). Residue from the destruction still contains rare earth elements. <br />