陽イオン交換樹脂によるジルコニウムとハフニウムの分離
1969 年 85 巻 972 号 p. 269-274
詳細
1969 年 85 巻 972 号 p. 269-274
This investigation relates to a basic study on the separation of zirconium and hafnium, especially on the purification of hafnium for large production scale.
This results are as follows:
(1) By the use of sulfuric acid as an eluant, its suitable concentration for zirconium and hafnium separation is about 1.0 N. But fractional elution combined with 1.2N sulfuric acid is more effective for their separation than 1.0N. sulfuric acid only.
(2) When the flow rate of elution is 0.3-0.5ml/min/cm2, good separation of two metals is given.
(3) The ion exchange columns consists of 1st column in which the zirconium and hafnium ions are loaded and 2nd column in which these two ions are separated. Good separation of two metals is obtained by the use of the connected columns.
(4) When a mixed solution as acetone-sulfuric acid or methyl ethyl ketone-sulfuric acid mixture is used for elution, more effective separation of two metals is obtained than sulfuric acid only.
(5) In the elution of the columns, a small amount of hafnium is always eluted with zirconium before the main peak of zirconium appeares. So, it is difficult to obtain hafnium free zirconium.
