Cation exchange separation of metal ions using HF-H3BO3 media.

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概要

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• Using hydrofluoric–boric acid media, a new cation exchange method for the mutual separation of metals which form stable fluoride complexes has been developed. The addition of boric acid to a hydrofluoric acid solution reduces the free fluoride ion concentration to about one hundredth because of the formation of fluoroboric acid. This reduction of the free fluoride ion concentration makes it easy to control the formation of metal fluoride complexes, favoring their separation. As the fluoroboric acid has a buffer action relating to the fluoride ion concentration, the distribution coefficients of metal ions are not affected by the increase in the concentrations of metal ions, even at a low concentration of fluoride ions in the solution. By the use of hydrofluoric–boric acid media, such metals as zirconium, titanium, aluminium, and uranium can be separated from each other. The distribution coefficients of eighteen metals were investigated both in hydrofluoric acid and hydrofluoric–boric acid solutions.

• 公益社団法人 日本化学会の論文

著者

• Adachi Takeo

  Analytical Chemistry Laboratory, Japan Atomic Energy Research Institute

関連論文

• Cation exchange separation of metal ions using HF-H3BO3 media.
• Anion exchange separation of hard acid-metals using HF-H3BO3 media.

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