Multi-stage cross-flow separation of lithium isotopes by organic liquid film method

Abstract In this paper, a novel method, multi-stage cross-flow separation of lithium isotopes by organic liquid film method was investigated. A green organic extraction phase was formed with ionic liquid-B15C5-anisole, and the bis(trifluoromethanesulfonyl)imide solution was used as a multi-stage cross-flow balance liquid. The abundance of 6Li in the 20-stage cross-flow extraction increased from 7.51% to 8.17%. The effect of the concentration of bis(trifluoromethanesulfonyl)imide on the stripping of lithium ions in the organic extraction phase and the loss of lithium ions during the multi-stage cross-flow process was studied. Also, the number of theoretical cross-flow stages of the abundance of 6Li (30%) that can be used as nuclear fuel was predicted.