SOLVENT EXTRACTION OF SOME TERVALENT LANTHANOIDS WITH SALICYLALDEHYDE n-ALKANOHYDRAZONES
作者:
Hajime lshii,
Teruhiko Suzuki,
Tsugikatsu Odashima,
期刊:
Solvent Extraction and Ion Exchange
(Taylor Available online 1991)
卷期:
Volume 9,
issue 3
页码: 481-495
ISSN:0736-6299
年代: 1991
DOI:10.1080/07366299108918066
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Sal icylaldehyde n-alkanohydrazones (SAAH or H2L) having 1 to 13 carbon atoms in their alkyl chains were synthesized and used for the extraction of some lanthanoid ions (Ln3+) including praseodymium, europium and ytterbium ions from aqueous solutions containing both tri-n-butyIphosphate (TBP) and perchlorate into I,2-dichloroethane The extracted species were (Ln3+) (HL-)2(TBP)3(C101,-) for all SAAH. The partition coefficients, Kd, of SAAH increased with an increase in the carbon number of the alkyl chain, the increment of log Kb being 0.64 per a carbon atom. The acid dissociation constants of SAAH also increased slightly with an increase in the carbon number, but the extraction constants of their lanthanoid complexes were almost independent of the length of the alkyl chain.
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