title: Sulfinylcalix[4]arene-impregnated amberlite XAD-7 resin for the separation of niobium(V) from tantalum(V).
abstract: Amberlite XAD-7 resin was impregnated with p-tert-butylsulfinylcalix[4]arene. Niobium(V) was collected on the impregnated resin in yields of more than 90% around pH 5.4, whereas tantalum(V) was negligibly collected. The collected niobium(V) was desorbed with 9 M sulfuric acid nearly quantitatively, hence the separation of niobium(V) from tantalum(V) was successfully achieved.
authors.affiliation: Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Aramaki-Aoba 07, Aoba-ku, Sendai 980-8579, Japan. h-matsu@numse.nagoya-u.ac.jp
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Matsumiya
authors.forename: Shizu
authors.initials: S
authors.lastname: Yasuno
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Iki
authors.forename: Sotaro
authors.initials: S
authors.lastname: Miyano
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D009556:Niobium / Q000302:isolation & purification*; D010636:Phenols / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry; D013635:Tantalum / Q000302:isolation & purification*
chemical_list: D000180:Acrylic Resins; D010636:Phenols; D011137:Polystyrenes; D013440:Sulfides; C500450:thiacalix(4)arene; D009556:Niobium; C015661:amberlite XAD 7; D013635:Tantalum