Synthesis of DTMSO and Reactivity Studies on Its Extraction of Gold

Wu Songping, Gu Guobang, Cao Zhennian#
(Department of Applied Chemistry，Southchina University of Technology, Guangzhou 510640)
(AnalyticaL and Testing Center South China University of Technology, Guangzhou 510640)

Abstract Cyclic sulfoxides derivatives: a-dodecyl-tetrahydrothiophene-O-oxide(DTMSO) was prepared by the alkylation of tetrahydrothiophene-O-oxide. Ihe reactivity and mechanism of extracting of Au(Ⅲ) with DTMSO were investigated. The effeciency of its extraction of gold is 98% in lower acidity. The reaction is neutral solvent complexing extraction in CHCl≤2 mol·L-1, the composition of extraction complex is HAuCl4·3DTMSO，and Au(Ⅲ) is coordinated with Oatom in >S=O group； this reaction is acid association extraction in higher acidity, the composition of extraction complex is (H·nH2O·3DTMSO) +AuCl4-1.
Key words DTMSO, Extraction, Gold

　

DTMSO的合成及其萃金性能研究

吴松平 古国榜 曹珍年#
(华南理工大学化工学院应用化学系 #华南理工大学分析测试中心 广州 510640)

摘要 本文讨论了环状亚砜衍生物a-十二烷-四氢噻吩亚砜(DTMSO)的合成及其萃金性能，用0.1 mol·L-1 DTMSO从0.89g·L-1 Au、0.1 mol·L-1, HCl的溶液中萃金，一次萃取率>98%；DTMSO在盐酸溶液中,低酸度下以中性络合溶剂化机理萃金，萃合物组成为(HAuCl4)·3DTMSO，DTMSO通过氧与金配位；高酸度下，以离子缔合机理萃金，萃合物组成为(H·nH2O·3DTMSO )+AuCl4-。
关键词 a-十二烷-四氢噻吩亚砜 萃取 金

吴松平 男，33岁，博士生，现从事清洁生产与资源化利的研究。E-mail:wu50703@263.net
2001-05-13收稿，2001-10-15修回

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