(1. 华南师范大学 化学与环境学院，广州 510006；
2. 华南理工大学 化学科学学院，广州 510640)
摘 要: 合成了异戊基苯并噻唑亚砜(ABSO)，研究了盐酸介质中ABSO萃取Pd(Ⅱ)的机理。考察水相H+浓度和萃取剂浓度对钯萃取的影响， 采用斜率法、红外光谱和核磁共振H谱法确定了萃合物的组成及萃取平衡的机理。结果表明：低酸度条件下，H+浓度对钯的分配比无影响，ABSO以中性配位萃取机理萃取Pd(Ⅱ)，并通过苯并噻唑环上的氮原子与Pd(Ⅱ)配位形成萃合物PdCl2(ABSO)2。
关键字: 钯；异戊基苯并噻唑亚砜；萃取
benzothiazolyl sulfoxide from hydrochloric acid media
（1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
2. School of Chemistry Science, South China University of Technology, Guangzhou 510640, China）
Abstract:Iso-amyl benzothiazolyl sulfoxide (ABSO) was synthesized and the mechanism of extraction of Pd(Ⅱ) with ABSO from hydrochloric acid media was studied. The effects of H+ and extractant concentration on the extraction of Pd(Ⅱ) were investigated. The composition of extracted complex and mechanism of extraction were determined by slope method, IR and H MNR spectra. The results show that the distribution ratio of Pd(Ⅱ) is independent on H+ concentration and ABSO acts as a neutral ligand coordinated with Pd(II) via thiazolyl N atom and forms Pd Cl2(ABSO)2 at low acidity.
Key words: palladium; iso-amyl benzothiazolyl sulfoxide; solvent extraction
