Speciation and separation of rhodium(III) from chloride solutions: A critical review

被引:169
作者
Benguerel, E
Demopoulos, GP
Harris, GB
机构
[1] MCGILL UNIV, DEPT MIN & MET ENGN, MONTREAL, PQ H3A 2A7, CANADA
[2] MIN IND TECHNOL COUNCIL CANADA, OTTAWA, ON, CANADA
关键词
D O I
10.1016/0304-386X(94)00086-I
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The recovery and purification of rhodium has always been difficult because of its complex aqueous chemistry in chloride solutions. A review of this chemistry, with special emphasis on speciation, is presented. Using available kinetic data, a new speciation diagram is proposed and it is shown that, even in relatively strong chloride solutions, there are at least two different rhodium aquo/chloro anionic species. In fact, it is shown that aquation may be even more prevalent than previously thought. This has serious implications on the behaviour of such solutions towards modern recovery processes such as solvent extraction. In addition, published solvent extraction and ion exchange separation schemes are reviewed, demonstrating the difficulties that have been encountered in devising a suitable process, due to the aqueous chemistry of rhodium.
引用
收藏
页码:135 / 152
页数:18
相关论文
共 64 条
[1]   PLATINUM METALS SOLUTION CHEMISTRY AND SEPARATION METHODS (ION-EXCHANGE AND SOLVENT-EXTRACTION) [J].
ALBAZI, SJ ;
CHOW, A .
TALANTA, 1984, 31 (10A) :815-836
[2]  
ASHRAFIZADEH S, 1994, UNPUB J COLLOID INTE
[3]  
BABA Y, 1988, P S SOLVENT EXTRACTI, P37
[5]  
BELYAEV AV, 1966, RUSS J INORG CHEM, V11, P836
[6]  
BELYAEV AV, 1982, KOORDINATS KHIM, V8, P443
[7]   AN INVESTIGATION ON THE EXTRACTION OF RHODIUM FROM AQUEOUS CHLORIDE SOLUTIONS WITH 7-SUBSTITUTED 8-HYDROXYQUINOLINES [J].
BENGUEREL, E ;
DEMOPOULOS, GP ;
COTE, G ;
BAUER, D .
SOLVENT EXTRACTION AND ION EXCHANGE, 1994, 12 (03) :497-516
[8]   COUNTERCURRENT EXTRACTION SEPARATION OF SOME PLATINUM GROUP METALS .2. [J].
BERG, EW ;
LAU, EY .
ANALYTICA CHIMICA ACTA, 1962, 27 (03) :248-&
[9]   SEPARATION OF RHODIUM AND IRIDIUM BY MULTIPLE FRACTIONAL EXTRACTION [J].
BERG, EW ;
SENN, WL .
ANALYTICA CHIMICA ACTA, 1958, 19 (02) :109-113
[10]   TIN(II) CHLORIDE IN THE ANALYTICAL-CHEMISTRY OF THE PLATINUM METALS - FROM THE PURPLE OF CASSIUS TO POLYURETHANE FOAMS [J].
BRACKENBURY, KFG ;
JONES, L ;
NEL, I ;
KOCH, KR ;
WYRLEYBIRCH, JM .
POLYHEDRON, 1987, 6 (01) :71-78