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- W2524454345 abstract "Malachite is more floatable by using xanthate with δ-amino valeric acd than by using xanthate alone in the pH range where δ-amino valeric acid exists in a dipolar state. Xanthate adsorption on malachite increases with addition of δ-amino valeric acid, while there is an optimum addition of δ-amino valeric acid to obtain the maximum xanthate adsorption. Effect of δ-amino valeric acid on xanthate adsorption on malachite is greater in xanthate having a longer alkyl chain length. It was demonstrated by the CNDO MO calculation for a supermolecule composed of δ-amino valeric dipolar ion and ethylxanthate ion that both reagents should be adsorbed more densely in a stable orientation at a mineral-water interface when they existed together than they existed separately. Futhermore, a supermolecule with δ-amino valeric dipolar ion and amylxanthate ion is more stable than that with δ-amino valeric dipolar ion and ethylxanthate ion. In surface complex formation the 4 sp orbitals (not the 3 d orbitals) of copper play a dominant role in binding between copper and oxygen (δ-amino valeric dipolar ion) or between copper and sulfur (ethylxanthate ion). The π-π bonding makes a rather great contribution to form the above bonds." @default.
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- W2524454345 date "1983-01-01" @default.
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- W2524454345 doi "https://doi.org/10.4144/rpsj1954.30.3" @default.
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