一种新型螯合剂的合成及对钴(Ⅱ)离子螯合性能的研究  

Synthesis of a Novel Chelating Agent and Research on Its Chelating Performance of Cobalt(Ⅱ) Ions

作　　者：彭青林[1] 周随安[1] 湛雪辉[1] 曹芬[1] 

机构地区：[1]长沙理工大学化学与环境工程学院,湖南长沙410076

出　　处：《湖南师范大学自然科学学报》2011年第1期56-59,共4页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(50774016);湖南省科技攻关资助项目(2008FJ3009;2010NK3002)

摘　　要：以对甲基苯硫酚为原料,在二氯甲烷与乙醇的混合溶液中进行硝化反应,合成一种用于回收贵重金属离子的新型螯合剂.研究结果表明:在硝化反应中,当反应物浓硝酸与对甲基苯硫酚的物质的量比为4∶1,反应温度为15℃,反应时间为3 h时,产率达48.5%;使用不同质量的产物作为螯合剂与5 mL含钴离子1 681 mg/L的废旧锂电池浸出液进行螯合实验时,螯合剂用量为0.30 g时螯合率达98.7%;使用8 mol/L的HCl溶液对螯合物进行解吸附,钴离子释放率达到83.6%.A novel chelating agent,which can be used to recovery noble metal ions,was synthesized via nitration reaction using p-thiophenol as raw materials in the mixture of methylene chloride and ethanol.Research results showed that in the nitration reaction the maximum yield was 48.5% under the conditions as follows：the molar ratio of concentrated nitric acid to p-thiophenol 4∶1,reaction temperature 15 ℃ and reaction time 3 h;when different mass of chelating agent was used to process chelating experiment with 5 mL leaching solution of spent Li-ion batteries which contained 1 681 mg/L Co2＋,the chelating ratio reached 98.7% when the mass of chelating agent was 0.3 g;and the maximum of release ratio reached 83.6% when 8 mol/L of hydrochloric acid solution was used to de-adsorption.

关 键 词：螯合剂 钴离子 螯合性能 

分 类 号：X705[环境科学与工程—环境工程]