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本文在草酸-盐酸体系中,研究钼、钨等元素在强碱性阴离子交换树脂Zerolit FF上的阴离子交换行为,并确定其分离的最佳条件。用高仅2厘米,直径0.9厘米的交换柱可分离大量钨等元素中的微量钼;其分离比率高达1×10~4:1。应用于试剂级钨酸钠中钼的分离,结果满意。此外,还确定在该体系中,钼与树脂相进行交换的主要形式为MoO_2(C_2O_4)_2~(3+)。
In the oxalic acid-hydrochloric acid system, the anion exchange behavior of molybdenum, tungsten and other elements on Zerolit FF, a strongly basic anion exchange resin, was studied and the optimal conditions for its separation were determined. With an exchange column of 2 cm in height and 0.9 cm in diameter, a large amount of trace molybdenum in tungsten and other elements can be separated; its separation ratio is as high as 1 × 10 -4: 1. Used in reagent grade sodium molybdate separation, the results are satisfactory. In addition, the main form of exchange between molybdenum and resin phase in this system is also determined to be MoO 2 (C 2 O 4) 2 ~ (3+).