ELUTION OF TUNGSTEN BY SODIUM COMPOUNDS AND ACCELERATION EFFECTS OF COEXISTENT COUNTER IONS IN MIXED ELUANT

• 作者: WanLinsheng DengZuoGuo
• 来源期刊: 中国反应性高分子：英文版
• 学科: 化学
• 关键词: 强碱阴离子交换树脂 钨 钠化合物 加速效应 混合洗提液 共存相反离子
• 年，卷（期）: 1995,（1）
• 页码范围: 1-7
• 页数: 7页
• 分类号: O614.613

摘要

The elution of WO4^2- ions by NaOH、NaNO3、NaCl and NH4Cl on strong basic anion exchange resins in quaternary ammonium form I and the adsorption properties after elution were studied.In addition,the elution curve,the permeation curve and the exchange capacities of operation were presented.The eluate containing tungsten with high content and excessive eluant of low content were obtained by employing the process of eluting using mixed solution of NaCl and NaOH.It′s possible to obtain Na2WO4·2H2O with high purity by evaporating and crystallizing the eluate.The results of mixed elution showed that the diffusion coefficients of Cl^-、OH^- and WO4^2- ions in solution or exchange agent varied due to the coexistence of counter ions and then the exchange velocity of WO4^2-→Cl^- and WO4^2-→OH^- was accelerated.