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Flotation of perrhenates with cationic surfactants: Effect of surfactant's structure
Author(s) -
Charewicz Witold A.,
Walkowiak Wladyslaw,
Beger Jörg,
Schiefer Horst,
Jacobi Renate
Publication year - 1987
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280380405
Subject(s) - perrhenate , cationic polymerization , pulmonary surfactant , chemistry , hydrocarbon , ammonium , aqueous solution , inorganic chemistry , nuclear chemistry , organic chemistry , rhenium , biochemistry
An experimental investigation is presented on the flotation of perrhenate anions from diluted aqueous solutions (5.10 −5 M ) with numerous cationic surfactants of systematically varying molecular structure. Alkyltrimethyl‐ammonium bromides, alkoxycarbonylmethyl‐trimethylammonium chlorides, alkoxycarbonylmethyl‐dimethylbenzylammonium chlorides, ethoxycarbonylmethyl‐dimethylalkylammonium chlorides, N‐substituted dodecylamines, and diquaternary ammonium bromides were investigated at their initial concentrations in the feed solution, 1.10 −4 M or 2.10 −4 M . It was found that both the length of the main hydrocarbon chain and of the short hydrocarbon groups govern the affinity of a cationic surfactant towards perrhenate anions. In order to achieve the effective flotation of perrhenate or similar anions the value of C:N atomic ratio for a tertiary or a quaternary ammonium surfactant should be in the range 15 to about 26. This value can be used as a primary criterion for the sufficient flotation capability of an alkylammonium surfactant.