【摘要】 利用葡氨基螯合树脂D403从钼酸盐溶液中分离钨和钒。静态实验表明,在弱碱性条件（pH=9.25）下,接触时间为4 h时,钨和钒优先被树脂吸附。当Mo/V（Mo/W）摩尔比超过40时,分离系数α_Mo^V与α_Mo^W分别达到45和18。解吸结果显示,使用1 mol/L NaOH溶液在1 h内即解吸树脂上的钨和钒。等温吸附过程结果表明,D403对3种金属离子的吸附均属于Freundlich模型。动态离子交换实验结果进一步证实了D403树脂在钼酸盐溶液中除钨和钒的实用性,除钨率和除钒率分别高达90%和99.4%。更多还原

【Abstract】 The removal of tungsten（W） and vanadium（V） from molybdate solutions was studied using the poly hydroxyl chelating resin D403 in batch and column experiments. The batch experiments indicated that tungsten and vanadium could be preferentially adsorbed by the D403 resin for 4 h in molybdate solution at a pH of approximately 9.25. Separation factors, α_Mo^V and α_Mo^W, were above 45 and 18, respectively, when the molar ratios of Mo/V and Mo/W in the solution exceeded 40. Elution tests illustrated that vanadium and tungsten could be easily eluted from the resin with 1 mol/L sodium hydroxide solution in only 1 h. To further explore the sorption mechanism of the resin, the experimental equilibrium isotherm data of the three metals fitted well with the Freundlich model. The column experiments confirmed the adaptability of the D403 resin in the production of sodium molybdate with a removal rate of tungsten surpassing 90% and that of vanadium of 99.4%.更多还原