Rate-controlling mechanism of cobalt transport through supported liquid membranes containing di(2-ethylhexyl)phosphoric acid

Journal Article · Fri Dec 31 23:00:00 EST 1993 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399408002479· OSTI ID:5225008

Juang, R S; Jiang, J D ^[1]

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1. Yuan-Ze Inst. of Technology, Taoyuan (Taiwan, Province of China)

In this paper the permeation process of trace cobalt(II) through supported liquid membranes using di(2-ethylhexyl)phosphoric acid as a mobile carrier was modeled and the rate-controlling mechanism was examined. The permeation rate equations were derived considering diffusion of metal ions across the aqueous stagnant layers toward the membrane, chemical reaction at the feed-membrane interface, and diffusion of extractant and its metal complex in the membrane phase. The application of the measured permeation rates for determining the kinetic parameters of the solvent extraction reaction was also investigated. It was found that the calculated rates were in good agreement with the measured ones (average standard error, 12%). 25 refs., 5 figs., 2 tabs.

• OSTI ID: 5225008
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 29:2; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
CHARGED PARTICLES
COBALT IONS
COMPILED DATA
DATA
DIFFUSION
DISTILLATES
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
GAS OILS
INFORMATION
IONS
KEROSENE
LIQUID FUELS
MASS TRANSFER
MEMBRANE TRANSPORT
MEMBRANES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PERMEABILITY
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHOSPHORUS COMPOUNDS
POLYMERS
POLYOLEFINS
POLYPROPYLENE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
SUPPORTED LIQUID MEMBRANES