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The extraction and separation of heavy rare earths is always one of the most challenging unit operations in hydrometallurgy. Research and development of novel efficient extractant is one way to solve this problem. Organophosphinic acid is a good potential extractant. A new method was established for the synthesis of nonsymmetric dialkylphosphinic acid (NSDAPA) (R′R″POOH, R′≠R″), optimized the synthesizing...
The potential-pH diagrams for lithium–titanium–water system at temperatures of 333.15, 363.15, 393.15 and 453.15K and ion activities of 0.01, 0.1 and 1 of the dissolved species were constructed to predict the predominant areas of lithium–titanium composite oxides in the Li–Ti–H 2 O system. Empirical functions were applied to estimate the thermodynamic data, which are unavailable in the literature...
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