Crystal Engineering in Antisolvent Crystallization of Rare Earth Elements (REEs)

Antisolvent crystallization is a separation technology that separates the solute from solvent by addition of another solvent, in which sparingly soluble. High yields are achieved using higher antisolvent-to-aqueous ratios, but this generates supersaturation, causes excessive nucleation. This results production smaller particles, difficult to handle downstream processes. In work, effect varying organic (antisolvent)-to-aqueous (O/A) ratio and seed loading on yield, particle size distribution, morphology neodymium sulphate product, during its recovery an aqueous leach solution antisolvent crystallization, was investigated. A batch crystallizer used for experiments, while ethanol as antisolvent. Neodymium octahydrate [Nd2(SO4)3.8H2O] seeds were investigate loading. It found sizes increased O/A increased. attributed agglomeration particles formed at high supersaturation. An 1.4 resulted with plate-like morphology. The increase yield interaction molecules reduced solubility sulphate. Increasing narrow distribution improved filtration performance. promotion crystal growth suppression presence seeds.