Lithium Isotope Separation using Cation Exchange Resin with High Cross-Linkage

The lithium isotope separation by the displacement chromatography using cation exchange resin has been studied. The cross-linkage effect of cation exchange resin on lithium isotope enrichment was confirmed by using the commercial cation exchange resin in our previous paper. In the present work, we synthesized the cation exchange resin with 50% cross-linkage, which is higher cross-linkage ratio than the commercial cation exchange resin, and the cation exchange isotope separation experiment using synthesized resin was carried out. As a result, we obtained the isotope separation coefficient of 6.6×10−3. This isotope separation coefficient is the highest one among results obtained by the cation exchange isotope separation methods.