Chemistry of metal chloride complexes in aprotic systems

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Sep. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/01496398308056109· OSTI ID:6065044

Felker, L K; Kelmers, A D

A study of metal chloride solubility in aprotic solvents has been initiated. These solvent systems have very low hydrogen ion activities and thus allow chloride ion activities which are much higher than those attainable in water. The high chloride ion activities can be generated by the dissolution of soluble salts, such as calcium chloride or sodium chloride, in the aprotic media. Metals that normally form aqueous-insoluble chlorides or exist as cations in aqueous solutions (e.g., Ag, Pb, Cd, or Au) may be readily dissolved in aprotic solvent systems as anionic chloride complexes or as solvation complexes. We constructed ternary phase diagrams for dimethylsulfoxide-water-calcium chloride (DMSO-H/sub 2/O-CaCl/sub 2/) and DMSO-H/sub 2/O-NaCl systems. These diagrams were used to establish the solution regions available for the solubilization of Pb, Ag, Au, Cd, Cu, Zn, and Al. Measurements of Pb and Ag solubilities in the DMSO-H/sub 2/O-CaCl/sub 2/ system gave concentrations as high as approx. 1.5 and approx. 0.9 M, respectively. Similar measurements showed concentrations of approx. 0.8, approx. 3.0, approx. 0.65, approx. 40, and approx. 0.85 M for Au, Cd, Cu, Zn, and Al, respectively. The concentrations of Pb and Ag in the NaCl system, approx. 0.45 and approx. 0.11 M, were much less than those obtained in the CaCl/sub 2/ system. Dissolution/precipitation steps, controlled by varying the ternary system composition, might lead to the development of useful methods for recovering, purifying, or separating various metal chloride compounds. 9 references, 11 figures.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6065044
• Journal Information: Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 18:14-15; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
CADMIUM CHLORIDES
CADMIUM COMPOUNDS
CADMIUM HALIDES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
COPPER CHLORIDES
COPPER COMPOUNDS
COPPER HALIDES
DATA
DATA ANALYSIS
DIAGRAMS
DISPERSIONS
DMSO
EXPERIMENTAL DATA
GOLD CHLORIDES
GOLD COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
LEAD CHLORIDES
LEAD COMPOUNDS
LEAD HALIDES
MIXED SOLVENTS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PHASE DIAGRAMS
QUANTITY RATIO
SILVER CHLORIDES
SILVER COMPOUNDS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLUBILITY
SOLVENT PROPERTIES
SOLVENTS
SULFOXIDES
TRANSITION ELEMENT COMPOUNDS
WATER
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDES