(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙410083；2. 遵義鈦業(yè)股份有限公司，遵義563004)
摘 要: 對(duì)鉬酸鹽溶液離子交換鉬釩分離機(jī)理進(jìn)行研究。研究結(jié)果表明，在鉬酸鹽溶液中V2O5含量約為0.5 g/L，釩與鉬在pH值為6.5~8.5的范圍內(nèi)分別以 和 的形態(tài)存在。由于強(qiáng)堿性陰離子交換樹脂對(duì) 的親和力大于對(duì) 的親和力，在交換過程中 優(yōu)先被吸附，從而實(shí)現(xiàn)鉬酸鹽溶液中鉬與釩的分離。在鉬酸銨溶液中強(qiáng)堿性陰離子交換樹脂的釩、鉬分離系數(shù)為295.62，取工作穿透點(diǎn)為0.02 g/L V2O5，可確保流出液用硝酸酸沉得到的鉬酸銨產(chǎn)品中釩的含量小于0.001 5%。
關(guān)鍵字: 鉬；釩；離子交換；分離機(jī)理
molybdate solution by ion-exchange
（1.School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Zunyi Titanium Industry Co. Ltd, Zunyi 563004, China）
Abstract:The mechanism of vanadium removal from ammonium molybdate solution by ion-exchange was studied. It is found that V(Ⅴ) and Mo existing in ammonium molybdate solution are in the forms of and MOO42−, respectively, when V2O5 concentration is about 0.5 g/L and the pH value is in the range of 6.5−8.5. The adsorption of is prior to that of by a strong base resin because the charges contained in are higher than those in , which made vanadium removed from the solution by ion-exchange. Experimental results show that the coefficient of vanadium separation from molybdenum is 295.62 for the resin in the ammonium molybdate solution, and the content of vanadium is less than 0.001 5% in the ammonium molybdate crystal that was obtained by adding nitric acid to the effluent collected till the breakthrough point up to 0.02 g/L V2O5.
Key words: molybdenum; vanadium; ion-exchange; separation mechanism
