负载型离子液体制备及其对湿法磷酸提纯研究
杨虎 , 杨思原 , 罗梦恒 , 吴晨旭 , 匡步肖 , 包申旭
现代化工 ›› 2025, Vol. 45 ›› Issue (7) : 112 -118.
负载型离子液体制备及其对湿法磷酸提纯研究
Preparation of loaded ionic liquids and study on their application in purification of wet process phosphoric acid
将离子液体通过化学接枝法负载在树脂上,制备了一种能从湿法磷酸中高效选择性吸附磷的负载型离子液体,并采用FT-IR、SEM-EDS和XPS对其进行表征分析。在制备温度为95℃、时间为16 h、液固比(mL∶g)为40∶1、氨基乙酸溶液浓度为2.66 mmol/g的条件下,制备的材料对磷的平衡吸附量达到333.1 mg/g。在选择性吸附方面,对磷的吸附量远高于杂质离子(铁、铝和镁),说明材料对磷与杂质离子有较好的分离性能。尤其是磷与镁的分离系数达到636.83。这表明此材料能够实现复杂磷酸溶液中磷与杂质离子的选择性分离,特别是在含镁量高的磷酸溶液中提纯效果显著。还通过表征分析推断该材料对磷酸吸附机理主要是络合反应与阴离子交换的协同作用。
A kind of loaded ionic liquid with a capacity to efficiently and selectively adsorb phosphorus from wet process phosphoric acid is prepared through loading ionic liquid onto resin by chemical grafting method,and characterized and analyzed via FT-IR,SEM-EDS and XPS.It is found that the equilibrium adsorption of phosphorus reaches 333.1 mg/g by the loaded ionic liquid that is prepared at a preparation temperature of 95℃,a preparation time of 16 h,a liquid-to-solid ratio of 40∶1 mL/g,and an aminoacetic acid solution with a concentration of 2.66 mmol/g.In terms of selective adsorption,the adsorption amount of phosphorus by the loaded ionic liquid is much higher than those of the impurity ions (iron,aluminum,and magnesium),indicating that the loaded ionic liquid has better performance in separating phosphorus from impurity ions.Especially,the separation coefficient between phosphorus and magnesium reaches 636.83,representing that this kind of ionic liquid is able to realize the selective separation of phosphorus from impurity ions in complex phosphoric acid solution,especially in the purification of phosphoric acid solution with high magnesium content.It is also deduced through characterization analysis that the adsorption mechanism of this loaded ionic liquid to phosphoric acid is mainly the synergistic effect of complexation reaction and anion exchange.
湿法磷酸 / 提纯 / 选择性 / 吸附 / 负载型离子液体
phosphoric acid made by wet process / purification / selectivity / adsorption / loaded ionic liquids
| [1] |
|
| [2] |
|
| [3] |
陈以明, 柳潇, 郝易潇, |
| [4] |
|
| [5] |
|
| [6] |
张俊, 韩喜超, 潘继斐, |
| [7] |
|
| [8] |
|
| [9] |
成建, 陈亚中, 王晔, |
| [10] |
|
| [11] |
|
| [12] |
刘洪波, 王振杰, 彭伟, |
| [13] |
|
| [14] |
|
| [15] |
彭向龙, 刘松林, 隋岩峰, |
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
于江怀, 鲍静静, 许家菱, |
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
国家重点研发计划(2022YFE0126800)
湖北三峡实验室开放基金(SC240017)
国家自然科学基金(52374276)
/
| 〈 |
|
〉 |