摘要
利用高锰酸钾氧化1,3,5-三甲苯制备了均苯三甲酸(苯-1,3,5-三甲酸),经纯化后,在(25±0.1)℃及离子强度I=0.1 mol·L-1KNO3条件下,用电位滴定法测定了均苯三甲酸的纯度及稀土离子与均苯三甲酸配位稳定常数,lgKML对稀土元素的原子序数显示了“双-双”效应,这对稀土离子的分离提纯提供了一种新的可能性。
:The trimesic acid (benzene-1,3,5-tricarboxylic acid) was synthesized by the oxidation of potassium permanganate for 1,3,5-trimethylbenzene. Under the conditions of I=0.1 mol·L-1KNO3 and (25±0.1)℃, the purity of the product recrystallized and the stable constants of trimesic acid with the rare earth ions was determinated with potentiometric titration. The lgKML values against the atomic number of the rare earth ions showed a double-double effect. The property is advantageous for the separation of the rare earth elements.
出处
《甘肃农业大学学报》
CAS
CSCD
2000年第4期441-444,共4页
Journal of Gansu Agricultural University
基金
甘肃省自然科学基金!编号:ZR97021)