caa a22 4500 469112891 CHVBK 20180323133116.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF02167968 doi (NATIONALLICENCE)springer-10.1007/BF02167968 Solvent extraction of lanthanum(III) and cerium(III) with dialkyldithiophosphoric acids. Separation from thorium(IV) [Elektronische Daten] [M. Curtui, I. Haiduc] The extraction of lanthanum(III) and cerium(III) with dialkyldithiophosphoric acids, Hdtp, into different polar and nonpolar solvents (cyclohexane, benzene, carbon tetrachloride, chloroform, diethyl ether, dibutyl ether, n-butanol and cyclohexanone) from aqueous solutions containing perchlorate, nitrate and chloride anions has been investigated. The effect of various factors, such as nature of the solvent, pH, metal concentration and foreign anions present in the aqueous phase was investigated in order to establish the mechanism of extraction process. The data obtained suggest an ion-exchange mechanism. The anions present in the aqueous phase do not participate in the extraction process and do not influence significantly the magnitude of the extraction ratios either. The extracted species in the organic phase is a 1∶2 complex of lanthanide with Hdtp. The extraction efficiency (E%) is calculated and the possibility of Th-rare earths separation is discussed. Akadémiai Kiadó, 1992 Curtui M. Chemistry Department, Babes-Bolyai University, R-3400, Cluj-Napoca, Romania aut Haiduc I. Chemistry Department, Babes-Bolyai University, R-3400, Cluj-Napoca, Romania aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 164/2(1992-01-01), 91-101 0236-5731 164:2<91 1992 164 10967 https://doi.org/10.1007/BF02167968 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02167968 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Curtui M. Chemistry Department, Babes-Bolyai University, R-3400, Cluj-Napoca, Romania aut NATIONALLICENCE 700 1- Haiduc I. Chemistry Department, Babes-Bolyai University, R-3400, Cluj-Napoca, Romania aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 164/2(1992-01-01), 91-101 0236-5731 164:2<91 1992 164 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer