(1. 華南師范大學(xué) 化學(xué)與環(huán)境學(xué)院，廣州 510006；
2. 華南理工大學(xué) 化學(xué)科學(xué)學(xué)院，廣州 510640)
摘 要: 合成了異戊基苯并噻唑亞砜(ABSO)，研究了鹽酸介質(zhì)中ABSO萃取Pd(Ⅱ)的機(jī)理。考察水相H+濃度和萃取劑濃度對(duì)鈀萃取的影響， 采用斜率法、紅外光譜和核磁共振H譜法確定了萃合物的組成及萃取平衡的機(jī)理。結(jié)果表明：低酸度條件下，H+濃度對(duì)鈀的分配比無(wú)影響，ABSO以中性配位萃取機(jī)理萃取Pd(Ⅱ)，并通過(guò)苯并噻唑環(huán)上的氮原子與Pd(Ⅱ)配位形成萃合物PdCl2(ABSO)2。
關(guān)鍵字: 鈀；異戊基苯并噻唑亞砜；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
