Selective extraction of Cu/sup 2 +/ and Ag/sup +/ ions from sulfuric acid by synergistic combinations of tetradentate thia macrocycles with didodecylnaphthalene sulfonic acid

Conference · Sat Oct 01 04:00:00 EDT 1988 · Sep. Sci. Technol.; (United States)

OSTI ID:6256408

Moyer, B A; Westerfield, C L; McDowell, W J; Case, G N

The aqueous-insoluble thia macrocycles tetrathia-14-crown-4 (TT14C4) and tetrathia-16-crown-4 (TT16C4) strongly and selectively synergize the extraction of Cu/sup 2 +/ and Ag/sup +/ ions from aqueous sulfuric acid solutions by the organophilic cation exchanger didodecylnaphthalene sulfonic acid (HDDNS) in toluene diluent. Over a range of sulfur acid concentrations, the selectivity is given by the order Ag/sup +/ > Cu/sup 2 +/ > Mn/sup 2 +/, Fe/sup 2 +/, Fe/sup 3 +/, Co/sup 2 +/, Ni/sup 2 +/, and Zn/sup 2 +/, where synergism occurs only for Ag/sup +/ and Cu/sup 2 +/. Selectivity factors greater than 300 have been achieved for Cu/sup 2 +/ over ubiquitous Fe/sup 3 +/. The synergistic extraction of Cu/sup 2 +/ and Ag/sup +/ was explored as a function of sulfuric acid concentration, relative concentration of macrocycle vs. HDDNS, and loading.

• Research Organization: Oak Ridge National Lab., TN (USA)
• OSTI ID: 6256408
• Report Number(s): CONF-871038-
• Conference Information: Journal Name: Sep. Sci. Technol.; (United States) Journal Volume: 23:12-13
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
AROMATICS
CATIONS
CHARGED PARTICLES
CONDENSED AROMATICS
COPPER COMPOUNDS
DATA
EXPERIMENTAL DATA
EXTRACTION
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IONS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PH VALUE
QUANTITY RATIO
SEPARATION PROCESSES
SILVER COMPOUNDS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SULFONIC ACIDS
SULFURIC ACID
SYNERGISM
TRANSITION ELEMENT COMPOUNDS