The new approach to chose of reagents for flotation extraction of non-ferrous metals cations on the base of quantum-chemical calculations and Pirson’s principle has been developed. The possibility of usage the reactivity index of organic compounds, obtained as a result of quantum-chemical calculations as a criteria of estimation their flotation activity has been substantiated. The new class of prospecting collector reagents as compound ether of terephthalic acid has been educed.

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