caa a22 4500 469039175 CHVBK 20180323132805.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF00817592 doi (NATIONALLICENCE)springer-10.1007/BF00817592 Synergistic extraction of cadmium and cobalt with mixtures of 4-stearoyl-pyrazol-5-ol and tri- n -octylamine in toluene [Elektronische Daten] [Sigit,, Geneviève Goetz-Grandmont, Jean-Pierre Brunette] Synergistische Extraktion von Kadmium und Kobalt mit Mischungen von 4-Stearoyl-pyrazol-5-ol und Tri- n -octylamin in Toluol Summary: The synergistic extraction of cobalt and cadmium (M 2+) from 1M sodium perchlorate medium with mixtures of 1-phenyl-3-methyl-4-stearoyl-pyrazol-5-ol (HPMSP) and tri-n-octylammonium perchlorate (TOAH+, ClO 4 − ) in toluene, at 25°C, has been studied. Co and Cd are extracted asM(PMSP) 2 species with HPMSP alone (log12=−7.4 and −9.4 respectively), and as [TOAH−,M(PMSP) 3 − ] species in the presence of (TOAH+, ClO 4 − ). At high (TOAH+, ClO 4 − ) concentrations, the synergistic equilibrium is: $$M^{2 + } + 3\overline {HPMSP} + {\raise0.5ex\hbox{$\scriptstyle 1$}\kern-0.1em/\kern-0.15em\lower0.25ex\hbox{$\scriptstyle 2$}}(\overline {TOAH^ + ,ClO_4 ^ - } )_2 \rightleftharpoons [\overline {TOAH^ + ,M(PMSP)_3 ^ - } ] + 3H^ + + ClO_4 ^ - $$ of constant logK 131=−7.10 and −9.45 (M=Co and Cd, respectively). Owing to the anionic exchange between HPMSP and (TOAH+, ClO 4 − ) (logK exc=−4.0) that occurs at highestpH range, the synergistic extraction of cadmium, at low ammonium concentrations, is better described by: $$Cd^{2 + } + 2\overline {HPMSP} + (\overline {TOAH^ + ,PMSP^ - } ) \rightleftharpoons [\overline {TOAH^ + ,Cd(PMSP)_3 ^ - } ] + 2H^ + $$ of constant logK 121=−4.65. Springer-Verlag, 1992 4-Acyl-pyrazol-5-ols nationallicence Tri- n -octylamine nationallicence Tri- n -octylammonium perchlorate nationallicence 1-Phenyl-3-methyl-4-stearoyl-pyrazol-5-ols nationallicence Solvent extraction nationallicence Synergistic effect nationallicence Sigit, Laboratoire de Chimie Minérale et Analytique E.H.I.C.S., F-67008, Strasbourg-Cedex, France aut Goetz-Grandmont Geneviève Laboratoire de Chimie Minérale et Analytique E.H.I.C.S., F-67008, Strasbourg-Cedex, France aut Brunette Jean-Pierre Laboratoire de Chimie Minérale et Analytique E.H.I.C.S., F-67008, Strasbourg-Cedex, France aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/5(1992-05-01), 373-381 0026-9247 123:5<373 1992 123 706 https://doi.org/10.1007/BF00817592 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00817592 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sigit Laboratoire de Chimie Minérale et Analytique E.H.I.C.S., F-67008, Strasbourg-Cedex, France aut NATIONALLICENCE 700 1- Goetz-Grandmont Geneviève Laboratoire de Chimie Minérale et Analytique E.H.I.C.S., F-67008, Strasbourg-Cedex, France aut NATIONALLICENCE 700 1- Brunette Jean-Pierre Laboratoire de Chimie Minérale et Analytique E.H.I.C.S., F-67008, Strasbourg-Cedex, France aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/5(1992-05-01), 373-381 0026-9247 123:5<373 1992 123 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer