Prediction and control of extraction ability and some physico-chemical properties of extractants

Results of investigations on solvent extraction of metals, including rare earths and actinides, by different extractions are generalized. Methods of forecasting and regularities, responsible for extraction ability (EA) of mono- and bidentate neutral compounds, organic acids, crown-esters are discussed. Consideration is given to correlation EA dependences on various characteristics of extractant molecules, such as electronegativity of substituents of the active (donor) center, basicity constant, energy of internal levels of oxygen atom, ionization potential, affinity to proton and others. Possibility of directed regulation and improvement of some physicochemical properties of extractants is shown