对叔丁基杯[6]甲酯芳烃萃取Sr^(2+)的特性研究

Research on Sr^(2+) Extraction with p-Tert-butylcalix[6] Arene

根据高放废液中Sr^(2+)的萃取分离需求,合成了对叔丁基杯[6]甲酯芳烃(Calix SMO),并利用FT-IR、1H-NMR和MS表征确认了其化学结构。选择CH2Cl2作为Calix SMO的稀释剂,当体系初始HNO3浓度为3 mol×L-1时,在298 K下,萃取时间120 min,对Sr^(2+)的萃取率为60%;通过计算,有机相中Calix SMO与Sr^(2+)包合比为1:2。分别研究对K+、Sb3+、Ca^(2+)、Sm3+、Sn4+、Na+的萃取,表明Calix SMO对Sr^(2+)有良好的选择性。

p-tert-butylcalix[6]arene（Calix SMO） was synthesized for Sr^2＋ separation and the chemical structure of the synthesized product was confirmed by FT-IR, 1HNMR and MS. The results show that when the initial concentration of nitric acid is 3 mol·L^-1 and CH2Cl2 is used as the organic solvent, the Sr^2＋ extraction rate could reach to 60% after extraction for 120 min under 298 K. The ratio of Calix SMO/Sr^2＋ in the inclusion complexes is 1/2. Moreover, studies on the extraction of K^＋, Sb^3＋, Ca^2＋, Sm^3＋, Sn^4＋ and Na^＋ show that Calix SMO has good selectivity for Sr^2＋.