| Abstract: | Abstract Some β-diketones such as LIX 51 (Henkel KGaA), Hostarex DK 16 (Hoechst AG), LIX 54 (Henkel KGaA), and MX 80A (Sigma Innovation, Sweden) were developed for technical applications (1) but only LIX 54 is commercially available. The use of LIX 54 to separate copper from ammoniacal etch solutions is described by patent applications (2–4) and an information paper of Henkel KGaA. The extraction of transition metals with LIX 54 was studied by Ramesh et al. (5). LIX 54 in a mixture with neutral donor ligands also proved suitable for the extraction of lanthanide elements (6). The active component of LIX 54 and MX 80A was recently identified as a mixture of isomeric l-phenyl-3-iso-heptyl-1,3-propanediones (7, 8). Analogous P-diketones are easily available. |
