富集^(186)W同位素的氧化钨制备工艺研究

The Research of Preparation Process of Tungsten Oxide with Enriched^(186)W Isotope

富集氧化钨是^(186)W的稳定同位素产品之一,主要用于制备放射性医用同位素产品^(188)WO_(3),^(188)WO_(3)能够用作^(188)W/^(188)Re发生器的靶料,生产^(188)Re医用同位素产品,用于生物医学标记、骨癌治疗等医学应用。为满足当前富集^(186)WO_(3)市场需求,以富集六氟化钨-186(^(186)WF_(6))为原料,确定富集^(186)WO_(3)的制备工艺路线,探究工艺参数对^(186)WO_(3)纯度和工艺收率的影响规律,确定最佳工艺参数。在最佳工艺条件下,^(186)WO_(3)样品的化学纯度达到99.91%~99.93%,制备工艺收率达到89.8%~90.5%。以上结果为^(186)WO_(3)样品制备提供了理论和实验依据,并为其他气相氟化物制备金属氧化物的工艺过程提供参考和借鉴。

Enriched tungsten-186 oxide is one of the stable isotope products of tungsten.It is used to prepare the radioactive medical isotope product^(188)WO_(3),which can be used as the target material of^(188)W/^(188)Re generator to produce medical^(188)Re isotope product,so as to meet the increasing requirements of biomedical markers,bone cancer treatment and other medical related fields.In order to satisfy the current market demand for^(186)WO_(3),the preparation process of^(186)WO_(3)with tungsten-186 hexafluoride(^(186)WF_(6))as the raw material was studied and determined.The key parameters of preparation processes were systematically optimized,and the influence of essential parameters on the^(186)WO_(3)product purity and process yield was obtained,which determined the optimal process parameters.Finally,the high conversion rate process route was achieved,and the enriched^(186)WO_(3)products were obtained.The chemical purity of^(186)WO_(3)can reach 99.91%-99.93%with the process yield of 89.8%-90.5%under the optimal process conditions.The research consequences of this article can provide a theoretical and experimental basis for the batch preparation of^(186)WO_(3),and give the technical reference for the process of preparing metal oxides from other similar gas-phase fluorides.