Countercurrent extraction of the rare-earth acetylacetonates☆

Add time:09/08/2019    Source:sciencedirect.com

The countercurrent distribution behaviour of the rare-earth acetylacetonates in different solvent systems has been studied. Solubilities of the chelates in various solvents were determined in order to obtain data on the partition coefficients. The hydrated rare-earth acetylacetonates hydrolyze upon dissolving in benzene. Excess acetylacetone prevents hydrolysis and lowers the solubility of the chelates in the organic phase. A four-component system using acetylacetone, chloroform, methanol and water was developed. The acetylacetone in the chloroform phase suppressed hydrolysis and the methanol in the aqueous phase increased the solubilities of the chelates by a factor of ten over the solubilities in the water-acetylacetone system.

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