(1. 河南科技大學(xué) 材料科學(xué)與工程學(xué)院，洛陽 471023；
2. 河南省耐磨材料工程技術(shù)研究中心，洛陽 471003；
3. 河南省高溫結(jié)構(gòu)與功能材料重點實驗室，洛陽 471003)
摘 要: 針對目前溶液體系中錸和鉬分離困難的問題，通過樹脂選型確定選用中強堿性陰離子交換樹脂Purolite A172分離錸和鉬，研究A172樹脂對錸的吸附性能和對錸-鉬的分離性能。結(jié)果表明：A172樹脂吸附錸的反應(yīng)為放熱反應(yīng)，而且吸附速率很大，吸附速率常數(shù)k298 K=7.719×10-4 s-1，受內(nèi)擴散控制，樹脂對錸的靜態(tài)飽和吸附容量達到340.13 mg/g濕樹脂；當(dāng)錸溶液pH=9、搖床往復(fù)震蕩速率110 r/min、搖床水浴溫度25 ℃、吸附時間1 h時，樹脂對錸的吸附量最大；當(dāng)以濃度為2 mol/L硫氰酸銨為解吸劑，在溶液pH=5、搖床往復(fù)震蕩速率150 r/min、搖床水浴溫度50 ℃下解吸5 h時，錸的解吸率最高，達到99.19%。大量的鉬會阻礙錸的吸附，但隨著吸附時間的延長，被吸附的鉬逐漸被錸取代，錸和鉬的分離因數(shù)最大值達到1192；解吸時，負(fù)載的鉬對錸的解吸也有抑制作用，隨著鉬錸質(zhì)量比的增加，錸的解吸率降低。
關(guān)鍵字: 錸；鉬；Purolite A172；離子交換
（1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;
2. Henan Engineering Research Center for Wear of Material, Luoyang 471003, China;
3. Henan Key Laboratory of High-temperature Structural and Functional Materials, Luoyang 471003, China）
Abstract:In order to solve the separation problem of rhenium(Re) and molybdenum(Mo) in aqueous solution system, the medium basic anion exchange resin Purolite A172 was used to separate Re and Mo through the resin selection experiment. The adsorption characteristics of Re and separation behavior for Re-Mo system using A172 resin were studied respectively. The results show that the adsorption of Re by A172 resin is an exothermic reaction, the adsorption rate is very fast and the constant is k298 K=7.719×10-4 s-1. The adsorption reaction is limited by internal diffusion, and the static saturated adsorption capacity of A172 on Re reaches 340.13 mg/g swollen resin. The maximum adsorption capacity are obtained at pH=9, reciprocating concussion rate of 110 r/min, bath temperature of 25 ℃and adsorption time of 1 h. Meanwhile, the desorption rate of Re can reaches 99.19% when the desorption reaction are using ammonium thiocyanate as desorption agent with concentration of 2 mol/L, pH=5, reciprocating concussion rate of 150 r/min, bath temperature of 50 ℃, and desorption time of 5 h. A large amount of Mo will hinder the adsorption of Re. However, with the extension of adsorption time, adsorbed Mo will gradually be replaced by Re, therefore, the separation factor of Re and Mo increases gradually and reaches the maximum value of 1192. In desorption experiment, the loaded Mo inhibit the desorption of Re, and the greater the Mo content, the more obvious the inhibition effect.
Key words: rhenium; molybdenum; Purolite A172; ion exchange
