Comparison of Naphthenic Acid, Versatic Acid and D2ehpa for the Separation of Rare Earths

Separation of rare earths and other valuable metals from deep-eutectic solvents: a new alternative for the recycling of used NdFeB magnets

“…These slopes are in concordance with what has been published previously by other authors. 16,[58][59][60][61][62] Cyanex 923 has been widely used in the extraction of rare earths from nitrate media. [62][63][64] In general, solvating extractants have been mostly used when extracting from nitrate media because they offer higher distribution ratios and separation factors than from chloride media.…”

Synergistic solvent extraction studies of uranium(VI) using a combination of naphthenic acid and various neutral donors into benzene

“…Comparison of naphthenic acid, versatic 10 acid and di-2-ethyl hexyl phosphoric acid based on PHo. 5 values for the separation of rare earths has been reported by ZHENG et al 4 The degree of extraction of alkaline earth metals using both aliphatic carboxylic acids 5 and naphthenic acids 6 have been carried out. (Cu2R2HR)2, (NiR2.2HR)2, and (COR2.2HR)2 were found to be the extracted species for the extraction of Cu, Ni, Co by naphthenic acid.…”

Improved Extraction of Rare Earths of La, Ce, Pr, and Nd by Optimizing the Structure of Phenoxyacetic Acid

“…Up to date, various types of extractants have been developed and applied in hydrometallurgy of REs. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Among these extractants, carboxylic acids are promising and have been applied in REs hydrometallurgy for years. However, the extraction ability of carboxylic acids is not satisfactory, and structure optimization and synergistic extraction systems have been adopted to improve the extraction ability of carboxylic acids.…”