Liquid-liquid extraction (LLE) is a technique to cover the wide variety of the science and technology research areas due to its importance as well as key role to produce the pure metals without waste generation. Research and development trends in the new millennium begin the search for new routes to establish for rare and precious metals extraction and separation with their associated elements from natural resources as well as spent matrices. Developed and developing countries mainly depend on the rare metals recycling and reuse based on their uses in electronic and other materials manufacturing at the same time their resources are very limited at all over the globe. Zirconium and hafnium metals are basically finds application in the nuclear power program due to the combination of variety of properties. It is well reported that the extractive separation of pair of metals such as zirconium and hafnium is very difficult due to their similar chemical properties. LLE behavior of these metal ions with commercially available extractants such as organophosphorus, thioorganophosphorus, oximes and synthetic complexing reagents like isoxazolones an interesting class of -diketones is worth exploring, they could be successfully, employed for the LLE studies of tetravalent zirconium and hafnium.

The high prices of precious metals like platinum group metals (PGM's) have ensured that there is continued interest in the development of new extractants for the commercial concentration and separation of these metals. The PGM's platinum, palladium, rhodium, iridium, osmium and ruthenium together with silver, and gold generally occur in nature with the major base metals like iron, copper, nickel and cobalt and wide range of minor elements such as lead, tellurium, selenium and arsenic and both technical and commercial considerations demand that the indusial PGM's be separated from the other metals and each other to high purity, with high yield and with a high percentage recovery. Liquid- liquid extraction (LLE), also called solvent extraction (SX), is a process that allows the separation of two or more components due to their unequal solubility's in two immiscible liquid phases. In LLE processes, there are many cases both in analytical and industrial chemistry where the main objective of separation is achieved by extraction using a chemical extractant. In analytical and separation science, this method enjoys a favored position among separation techniques because of its simplicity.