Zinc Isotope Separation by Phenol Formaldehyde Type 15-Crown-5 Resin in Organic Solvents

Xingcheng DING Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan

Hyung-Jung KIM Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan

Masao NOMURA Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan

Tatsuya SUZUKI Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan

Yuichi SUGIYAMA Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan

Yasuhiko FUJII Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan

Abstract

Zinc adsorption and isotope separation by newly synthesized benzo-15-crown-5 resin was evaluated using various solvents. This resin was synthesized in the pores of silica beads for chromatography use. Larger adsorption of zinc was obtained in the case of acetic acid derivatives than in protic solvent such as water and alcohol by the batch treatment. The displacement chromatography was conducted to study zinc isotope separation. The isotope separation coefficient ε=0.32×10⁻³, 0.69×10⁻³ and HETP=0.2268, 0.3968 cm were determined for isotopic pair of ⁶⁸Zn/⁶⁴Zn at 25°C by five meters migration experiment using methyl isobutyl ketone and acetic acid, respectively. The improvement of enrichment ratio is very small between 1 and 5 m migration. Hydrogen chloride and/or water obviously reduce zinc adsorption to this resin.

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Zinc Isotope Separation by Phenol Formaldehyde Type 15-Crown-5 Resin in Organic Solvents

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Zinc Isotope Separation by Phenol Formaldehyde Type 15-Crown-5 Resin in Organic Solvents

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