SEEU Review vol. 5 Nr. 2 (pdf) - South East European University

Fatmir Faiku, Haxhere Faiku, Murtezan Ismaili, Arben Haziri and Sevdije Govori
elements which land themselves to extraction as halogen comp-lexes. With
the help of organic solution of N,N-dioctyl-1-octanamine we have extracted
Fe, Cu and Ni. Methyl isobutyl ketone has been used as a carrier of the
organic phase, meaning, the solution for dissolving of amines with high
molecular mass. Methyl isobutyl ketone is very useful as it mixes with both
reagents and because of its affinity to form ion oxonium coupling with high
number of halogen complexes.
N,N-dioctyl-1-octanamine is a water insoluble, saturated, straight chain,
amine.
Table 1. Typical analysis
Tertiary amine content 95-97%
Secondary amine content 1%
Primary amine content 0.2%
Water 0.0%
Since the N,N-dioctyl-1-octanamine reagents contain basic nitrogen, they
typically react with a variety of inorganic and organic acids to form amine
salts, which are capable of undergoing ion exchange reactions with a host of
other anions. The general reactions shown below describe this behavior.
[R 3 N] org. + [HA] aq
[R 3 NH + A - ] org. (3)
[R 3 NH + A - ] org. + [B - ] aq
[R 3 NH + B - ] org. + [A - ] aq (4)
The extent to which B - will exchange for A - is a function of the relative
affinity of the two anions for the organic cation and the relative salvation
energy of the anions by the aqueous phase.
Only chemically pure substances have been used in all solutions. All
measurements have been done with atomic absorption spectroscopy (AAS).
To atomize, the flame of acetylene-air was used.
Results and Discussion
For extraction a 10 % solution N,N-dioctyl-1-octanamine in methyl
isobutyl ketone is prepared.
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