クロロビスマス(III)酸のイオン浮選

概要

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Ion flotation of bismuth (Ill) in hydrochloric acid solutions with cationic surfactants, cetyltrimethyl ammonium chloride (CTMAC) and cetylpyridinium chloride (CPG), was investigated. Bismuth (III), 36 to 180 ppm, in 0.35 to 2.0 M hydrochloric acid with 3.77×10^<-3> M CTMAC and in 0.35 to 3.4 M hydrochloric acid with 2.94×10^<-3> M CPC, was floated almost completely by bubbling with nitrogen for 20 to 30 minutes. The reaction of chlorobismuthate (III) with the surfactants can be expressed as follows: (n^^--3)R+Cl^-+BiCl_<n^^->(n^^--3)-⇄R_<(n^^--3)>(BiCl_<n^^->)+(n^^--3)Cl- where n^^- and R^+ denote the mean coordinate number of Cl^- and the cations of the surfactants, respectively. The existence of BiCl_4-, BiCL_5^<2-> and BiCL_6^<3-> could be ascertained from the consideration of the mole ratio for the combination of R^+ with BiCI_<n^^->(n^^--3)-, which was determined by the mole ratio and the continuous variation methods. The logarithms of the over-aII stability constants, β4_, β_5 and β_6, were found to be 6.3, 6.4 and 5.8, respectively, by the Fronaeous method.
社団法人日本分析化学会の論文
1976-04-10