After repeated extraction, thevast majority of compounds were extracted. It is the main raw material for theunit operation of separating mixtures by utilizing the different solubility ofcomponents in solvents in the system.

China has abundant rare earthresources, accounting for 40% of the world's reserves. Rare earth, as anemerging industry, has an increasingly wide range of applications. Extraction agent,as the main raw material for rare earth product production, has also beenwidely used. At present, the production and application of P507 extraction agent inChina have also gone through a development process of more than ten years withthe application of rare earths. Especially after the 2011 rare earth market,rare earth enterprises emerged like mushrooms after rain, promoting the rapiddevelopment of the rare earth industry.

The increasing demand in thefields of military, alloy materials, energy-saving batteries, and mobile phoneshas led to the development of high purification of rare earth products,resulting in an increasing amount of extraction agent.