螯合树脂研究 ⅩⅩⅩ.硫脲型树脂的合成及其吸附性能

螯合树脂研究 ⅩⅩⅩ.硫脲型树脂的合成及其吸附性能 Study on Chelating Resins Syntheses and Adsorption Properties of Thiourea Type Resins 徐羽梧 XU Yu wu 1 first-author 杨亚核 YANG Ya he 1 李汉平 LI Han ping 1 武汉大学化学学院 武汉大学化学学院 College of Chemistry, Wuhan University College of Chemistry, Wuhan University 用环硫氯丙烷分别与硫脲、氨基硫脲、对－亚苯基双硫脲和间－亚苯基双硫脲反应合成了四种新的硫脲型螯合树脂．由于硫脲及其衍生物分子中的硫酰氨基碱性较弱，上述反应要在较高温度下（８０～１００℃）才能顺利进行．研究了这类树脂对贵金属的吸附性能．它们对金、银的吸附容量比对钯、铂的高些，双硫脲型树脂的吸附能力又比单硫脲型树脂强些．Ｘ－光电子能谱的研究表明：此类硫脲型树脂吸附金时，配位原子Ｓ和Ｎ均起作用 Four new chelating resins（PSN1 4）containing mercapto and thiourea groups were synthesized by reaction of chloromethylthiirane （S） with thiourea （N1）, aminothiourea （N2）, p phenylenedithiourea （N3） and m phenylenedithiourea （N4）respectively.The adsorption capacities of all the four resins for Au（Ⅲ） and Ag（Ⅰ） were higher than those for Pd（Ⅱ） and Pt（Ⅳ） But the capacities of PSN3 and PSN4 for Ag （Ⅰ） and Au（Ⅲ） were higher than those of the PSN1 and PSN2.X ray photoelectron spectroscopy studies of resins（PSN1 2） and their metal [Au（Ⅲ）]chelates were made. The results showed that the adsorption of is belong to a chemical adsorption. During the adsorpton, the metal ions [Au（Ⅲ）]are electron acceptors while the co ordinate atoms S and N are electron donors. 硫脲型树脂 吸附 贵金属 X－光电子能谱 thiourea resin adsorption noble metal X ray photoelectron spectroscopy O633;O631.1 国家自然科学基金(61672102) 1999-02-01 2021-04-01 2