Application of zone melting techniques to metal chelate systems-I Concentration of trace amounts of aluminium in tris(acetylacetonato)chromium(III).
The possibilities of applying the zone melting technique to metal chelates are described and discussed. The technique has been applied to the system of tris(acetylacetonato)chromium(III)-tris-(acetylacetonato)aluminium(III). The concentrating effect is not dependent upon the initial concentration of the minor component, but on the rate of zone movement. When the rate is set at 15 mm hr , the value of the distribution coefficient, 0.55-0.64, is at a minimum, and may be assumed to be the equilibrium distribution coefficient under the conditions described.
Kaneko
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Department of Organic Synthesis, Faculty of Engineering, Kyushu University, Fukuoka, Japan.
Ueno
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