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Molecular design of the phenol type extractants

“…Moreover the following controllable parameters were selected:The formal charge on the nitrogen atom ( q ), as some metals such as scandium (Bychenkov et al 2008; Gladikova et al 2002) are extracted by PTE with the formation of chelates and the nitrogen atom inclusion to the chelate cycle. The value of q was calculated by the Milliken approach with the DFT (B3LYP) method, 6-21G basis set using the GAMESS-US (version September 7, 2006) program package.…”

“…According to (Gladikova et al 2002), in the course of scandium solvent extraction by the N-(2-hydroxy-5-nonylbenzil)-β,β-dihydroxyethylamine (NBEA) extractant the optimum pH is 4.5. However, in industrial products containing scandium there is a large amount of iron (III) as a rule (Korshunov et al 1987), and during the precipitation of iron hydroxide large losses of scandium take place due to co precipitation.…”

“…The testing of substances, used in other industries as extractants, is of big importance in the expansion of the range of extractants for the extraction of metals (Zolotov 1982). We suggest the use alkyl derivatives of phenols, applied in synthetic rubber industry, plastic industry and elastomers industry, as extractants (Bukin et al 1999; Bychenkov et al 2008; Gladikova et al2002). However, despite the promise of this idea, it is necessary to consider the fact, that reagents developed for other purposes may not meet to all requirements for extractants.…”