title: Halogen-free water-immiscible ionic liquids based on tetraoctylammonium cation and dodecylsulfate and dodecylbenzenesulfonate anions, and their application as chelate extraction solvent.
abstract: The tetraoctylammonium cation forms water-immiscible room temperature ionic liquids with dodecylsulfate and dodecylbenzenesulfonate anions. The ionic liquids are halogen-free and can be considered environmentally friendly solvents. At 25 degrees C, the solubilities of water in tetraoctylammonium dodecylsulfate and tetraoctylammonium dodecylbenzenesulfonate were 2.8 and 4.0%, respectively, and the densities were 0.92 and 0.93 g cm(-3). The ionic liquids formed stable interfaces with water at 25 degrees C. The possible use of tetraoctylammonium dodecylsulfate as chelate extraction solvent was evaluated by using 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione as extractant. Tetraoctylammonium dodecylsulfate showed high extraction performance for divalent transition metal cations.
authors.affiliation: General Research Center, Nicca Chemical, Co. Ltd., Bunklyo, Fukui 910-8670, Japan.
authors.forename: Toshihide
authors.initials: T
authors.lastname: Tsukatani
authors.forename: Hajime
authors.initials: H
authors.lastname: Katano
authors.forename: Hirosuke
authors.initials: H
authors.lastname: Tatsumi
authors.forename: Mika
authors.initials: M
authors.lastname: Deguchi
authors.forename: Naoki
authors.initials: N
authors.lastname: Hirayama
mesh_terms: D017738:Alkanesulfonic Acids / Q000737:chemistry*; D000838:Anions / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D002412:Cations; D002614:Chelating Agents / Q000737:chemistry / Q000494:pharmacology*; D006219:Halogens / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008670:Metals / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012995:Solubility; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D017738:Alkanesulfonic Acids; D000838:Anions; D001557:Benzenesulfonates; D002412:Cations; D002614:Chelating Agents; D006219:Halogens; D007477:Ions; D008670:Metals; D000644:Quaternary Ammonium Compounds; D012997:Solvents; D014867:Water; C017273:dodecylsulfonic acid; C001114:dodecylbenzenesulfonic acid