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Synergistic extraction of rare earths using acid-base coupling extractants of calix[4]arene carboxyl derivative and primary amine N1923

By He WW, Liao WP, Niu CJ and Li DQ


Synergistic effect in the extraction of rare earth (RE) metals by the acid-base coupling (ABC) extractants of calix[4]arene carboxyl derivative Bu-t[4]CH2COOH (H(4)A) and primary amine N1923 (RNH2) has been investigated. The extraction of RE was enhanced by the addition of sodium cations into the aqueous phase not only in the extraction system of Bu-t[4]CH2COOH alone but also in the mixture of Bu-t[4]CH2COOH and N1923. The separation factors (SFs) indicating the extraction selectivity of adjacent RE elements became higher in the mixture system

Topics: LIQUID SURFACTANT MEMBRANES, METAL-IONS, SOLVENT-EXTRACTION, BIS(2,4,4-TRIMETHYLPENTYL)PHOSPHINIC ACID, ACETIC-ACID, SEPARATION, BEHAVIOR, CALIXARENES, RIM, THENOYLTRIFLUOROACETONE, Metal ions, Solvent extraction, 4, Acetic acid, Separation, Behavior, Calixarenes, REACTION INJECTION MOLDING, 溶剂萃取, EXTRACTION PAR SOLVANTS, SELEKTIVE LAUGUNG, Four, ACIDE ACETIQUE, ESSIGSAEURE, GLACIAL ACETIC ACID, ethanoic acid, 分离, electrostatic separation, pervaporation, segregation, 行为, --Animal behavior, --Habits and behavior, Animal behavior, animal behaviour, behaviour, Ethology, Hibernation, Human behaviour, behavior patterns, behavioral response, behaviour patterns, behavioural response, response, behavioral, RIM
Year: 2008
DOI identifier: 10.1016/j.seppur.2008.03.022
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