Moriya Y, Sugai M, Nakata S, Ogawa N
Department of Materials-process Engineering and Applied Chemistry for Environments, Faculty of Engineering and Resource Science, Akita University, Tegata Gakuencho, Japan.
Anal Sci. 2001 Feb;17(2):297-300. doi: 10.2116/analsci.17.297.
The extraction behaviors of bismuth(III) with carboxylic acid (HL), which have not yet been clearly elucidated, because of the precipitation of hydroxide, were studied using the 2-bromoalkanoic acid in benzene and in hexane systems under aqueous conditions of high acidity at I = 1.0 M ((H,Li)NO3). The extraction equilibria were analyzed based on the-initial concentration of nitric acid and the concentration of bismuth(III) extracted in the organic phase. The extracted species and the logarithmic values of the extraction constant (log Kex) were found to be a single species of BiL3(HL)3 for the systems of 2-bromooctanoic acid/benzene (log Kex = -1.66) and 2-bromohexadecanoic acid/benzene (-1.58), and to be two species of BiL3(HL)4 (-1.01) and Bi3L9HL (-1.62) for the system of 2-bromooctanoic acid/hexane, where the monomer was dominant at a higher reagent concentration.
在I = 1.0 M （(H,Li)NO3）的高酸度水相条件下，使用苯和己烷体系中的2-溴代链烷酸研究了铋(III)与羧酸(HL)的萃取行为，由于氢氧化铋沉淀，其萃取行为尚未得到明确阐明。根据硝酸的初始浓度和有机相中萃取的铋(III)的浓度分析萃取平衡。对于2-溴辛酸/苯体系（log Kex = -1.66）和2-溴十六烷酸/苯体系（-1.58），发现萃取物种和萃取常数的对数值（log Kex）为单一物种BiL3(HL)3，对于2-溴辛酸/己烷体系，发现萃取物种和萃取常数的对数值为两种物种BiL3(HL)4（-1.01）和Bi3L9HL（-1.62），其中在较高试剂浓度下单体占主导。
