Bulletin of the Chemical Society of Japan p. 3477 - 3484 (1987)
Update date:2022-08-16
Topics:
Koide, Yoshifumi
Uchino, Masazumi
Yamada, Kimiho
Chelating surfactants bearing hydroxyaminocarbonyl and amino groups (RnAHx) and cotelomer-type surfactants bearing hydroxyaminocarbonyl and pyridyl groups (Ls-VP-Q-Hx) were prepared and applied as flotation collectors for a trace amount of uranium.The uranium in an aqueous of pH 4-8 and in seawater was floated more effectively by ion flotation using RnAHx or by foam fractionation using Ls-VP-Q-Hx, compared with alkylhydroxamic acid (RnHx) and telomers bearing hydroxyaminocarbonyl groups (Lo-Hx).The effective floation was concluded to be due to the chelate effects between the two groups on the complex formation and to the HLB of the resulting complex.Furthermore, the uranium recoveries were examined by using a hydroxamic acid polymer (62Hx), a N-methylhydroxamic acid telomer (Ls5.6MHx), and its cotelomer (Ls3.2VP4.5MHx).
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