ＲｅＯ_４~－在葡萄糖酸钠介质中还原后的氧化态分布研究

INVESTIGATION ON THE OXIDATION STATE DISTRIBUTION OF REDUCED RHENIUM IN SODIUM GLUCONATE MEDIUM

摘要: 用电位滴定法和萃取法研究了ＲｅＯ４－在葡萄糖酸钠介质中还原后铼的氧化态分布。实验结果表明，铼氧化态分布主要与酸度和还原剂浓度有关。在ｐＨ为２０的葡萄糖酸钠介质中，ＲｅＯ４－首先被亚锡还原为＋５价，进一步还原至＋４价和＋３价；反应介质的ｐＨ值越低，ＲｅＯ４－可被还原至更低价态。

Abstract: The studies on the oxidation state distribution of reduced rhenium in sodium gluconate medium have been reported. The results show that at pH=2.0,ReO 4 - is firstly reduced to Re(Ⅴ),and then further rednced to Re(Ⅳ) and Re(Ⅲ). The lower the pH values are the lower the oxidation state of the reduced rhenium will be.