Glycine enhanced separation of Co(II) and Ni(II) with bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272) by liquid-liquid extraction and supported liquid membranes

Journal Article · Tue Jan 01 00:00:00 EST 1985 · Solvent Extr. Ion Exch.; (United States)

DOI:https://doi.org/10.1080/07366298508918502· OSTI ID:5445051

Reichley-Yinger, L; Danesi, P R

The extraction behavior of Co and Ni ions from aqueous nitrate solution containing glycine, and their separation by liquid-liquid extraction and supported liquid membranes (SLMs) has been studied. The separation factor between the two metals is greatly enhanced by the presence of glycine. The enhancement is due to the preferential complexation of the Ni ions by glycine. The conditional equilibrium constants of the extraction reactions and the SLM permeability coefficients have been measured. The results indicate that metal glycinate complexes are not extracted and that in presence of glycine very clean Co-Ni separation can be obtained in a single SLM pass.

• Research Organization: Argonne National Lab., IL
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5445051
• Journal Information: Solvent Extr. Ion Exch.; (United States), Vol. 3:1-2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT
SOLVENT EXTRACTION
NICKEL
AQUEOUS SOLUTIONS
EXPERIMENTAL DATA
GLYCINE
MEMBRANES
NITRATES
PHOSPHINIC ACIDS
AMINO ACIDS
CARBOXYLIC ACIDS
DATA
DISPERSIONS
ELEMENTS
EXTRACTION
INFORMATION
METALS
MIXTURES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
TRANSITION ELEMENTS
400105* - Separation Procedures