EXTRACTION OF PALLADIUM(II) AND PLATINUM(IV) AS CHLOROCOMPLEX ACIDS INTO BASIC ORGANIC-SOLVENTS

被引:40
作者
HASEGAWA, Y
KOBAYASHI, I
YOSHIMOTO, S
机构
[1] Department of Chemistry, Science University of Tokyo, Shinjuku-ku, Tokyo 162, Kagurazaka
关键词
D O I
10.1080/07366299108918083
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Solvent extraction of platinum(IV) and palladium(II) with tri-n-octylamine(TOA) in o-xylene from 4.0M (Na,H)(Cl, HSO4) has been investigated at 298K in order to compare with similar extraction by trioctylphosphine oxide(TOPO). The dependence of the distribution ratio of platinum(IV) and palladium(II) on TOA, hydrogen ion and chloride ion concentrations suggests the dominant extracted species of these metals would be 2:1 for protonated amine : chlorocomplex anion and the extraction should be essentially anion exchange reaction. The extraction constants (Kex = D[H+(TOA)Cl-]o -2[Cl-]2), were evaluated as 10(6.3) and 10(5.8) for platinum(IV) and palladium(II), respectively. The anion exchange with protonated TOPO salt represented by H(TOPO)2 +Cl- is less than that with protonated TOA salt by a factor of one order.
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收藏
页码:759 / 768
页数:10
相关论文
共 7 条
[1]   EXTRACTION OF HREO4, HCLO4 AND HAUCL4 BY TRIOCTYLPHOSPHINE OXIDE IN BENZENE, 1,3,5-TRIETHYLBENZENE AND CHLOROFORM [J].
BUCHER, JJ ;
ZIRIN, M ;
LAUGEN, RC ;
DIAMOND, RM .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1971, 33 (11) :3869-&
[2]   SOLVENT-EXTRACTION BEHAVIOR OF PLATINUM(IV) AND PALLADIUM(II) AS CHLOROCOMPLEX ACIDS WITH TRIOCTYLPHOSPHINE OXIDE [J].
HASEGAWA, Y ;
KOBAYASHI, I ;
OKUDA, A .
ANALYTICAL SCIENCES, 1991, 7 (03) :377-381
[3]   ACTIVITY COEFFICIENTS AGGREGATION AND THERMODYNAMICS OF TRIDODECYLAMMONIUM SALTS IN NONPOLAR SOLVENTS [J].
KERTES, AS ;
MARKOVIT.G .
JOURNAL OF PHYSICAL CHEMISTRY, 1968, 72 (12) :4202-&
[4]   EXTRACTION EQUILIBRIA OF HYDROCHLORIC-ACID BY TRIOCTYLAMINE IN LOW-POLAR ORGANIC-SOLVENTS [J].
KOJIMA, T ;
FUKUTOMI, H .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1987, 60 (04) :1309-1320
[5]   SOLVENT-EXTRACTION EQUILIBRIA OF ACIDS .2. EXTRACTION OF PHOSPHORIC-ACID FROM VARIOUS AQUEOUS-SOLUTIONS WITH TRIOCTYLPHOSPHINE OXIDE [J].
NIITSU, M ;
SEKINE, T .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1976, 38 (05) :1053-1056
[6]  
SEELEY FG, 1966, J CHEM ENG DATA, V11
[7]  
[No title captured]