In the present study, the sorption of perrhenate ions from sulfuric acid liquors was studied using three types of polymer ion exchange resins. An anion exchange resin type 1 (a copolymer of 2-methyl-5-vinylpyridine with divinylbenzene (VP-DVB)) as well as two polyfunctional resins containing anion and cation exchange functional groups, namely, type 2 (a carboxylated VP-DVB with pyridine-2-carboxylic acid (picolinic acid) functional group) and type 3 (an aminophosphorylated VP-DVB with pyridine-2-[(methylamino)methyl]phosphonic acid functional group), were studied. The resins before and after rhenium sorption were characterized by FT-IR spectroscopy and XPS spectroscopy. The incorporation of additional acidic functional groups into the polymer matrix of the VP-DVB resins led to a slight decrease in the rhenium anion exchange capacity. At the same time, polyfunctional resins make it possible to strip rhenium with hydrochloric acid. A completely new process for the preconcentration of rhenium as a halide compound, which will contribute to the low-cost production of metallic rhenium, can be implemented using these new polyfunctional resins. Column sorption experiments using real uranium leach liquors demonstrated an exchange capacity of 33.2 mg of Re per gram of resin and a concentration factor in the eluate of ∼2500. The possibility of anion exchange recovery of rhenium from uranium leach liquors by Type 3 resin followed by direct precipitation of potassium hexachlororhenate from hydrochloric acid desorption liquor was demonstrated. The present study provided a new resin for rhenium recovery with excellent adsorption and elution characteristics, which is a promising candidate for practical applications.

中文翻译：

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从工业液体中阴离子交换回收铼，然后直接合成卤化铼盐


在本研究中，使用三种类型的聚合物离子交换树脂研究了硫酸液中高射酸根离子的吸附。研究了 1 型阴离子交换树脂（2-甲基-5-乙烯基吡啶与二乙烯基苯 （VP-DVB） 的共聚物）以及两种含有阴离子和阳离子交换官能团的多功能树脂，即 2 型（具有吡啶-2-羧酸（吡啶酸）官能团的羧基化 VP-DVB）和 3 型（具有吡啶-2-[（甲基氨基）甲基]膦酸官能团的氨基磷酸化 VP-DVB）。采用 FT-IR 光谱和 XPS 光谱对铼吸附前后的树脂进行了表征。将额外的酸性官能团掺入 VP-DVB 树脂的聚合物基质中导致铼阴离子交换能力略有下降。同时，多官能团树脂使用盐酸剥离铼成为可能。使用这些新的多官能团树脂，可以实现一种全新的铼预浓缩为卤化物化合物的工艺，这将有助于金属铼的低成本生产。使用真正的铀浸出液的柱吸附实验表明，每克树脂的交换容量为 33.2 mg Re，洗脱液中的浓度因子为 ∼2500。证明了通过 3 型树脂从铀浸出液中阴离子交换回收铼，然后从盐酸脱附液中直接沉淀六氯铑酸钾的可能性。本研究提供了一种具有优异吸附和洗脱特性的新型铼回收树脂，具有很有前途的实际应用前景。