Recovery of FLiBe from ThF4-FLiBe salt using precipitation-distillation coupled method

Yan Luo; Jianxing Dai; Qiang Dou; Haiying Fu; Qingnuan Li

doi:10.1039/d3ra00253e

Recovery of FLiBe from ThF₄-FLiBe salt using precipitation-distillation coupled method

RSC Adv. 2023 Feb 27;13(10):6637-6642. doi: 10.1039/d3ra00253e. eCollection 2023 Feb 21.

Authors

Yan Luo^{1

2

3}, Jianxing Dai^{1

2}, Qiang Dou^{1

2

3}, Haiying Fu^{1

2

3}, Qingnuan Li^{1

2

3}

Affiliations

¹ Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China fuhaiying@sinap.ac.cn liqingnuan@sinap.ac.cn.
² CAS Innovative Academies in TMSR Energy System, Chinese Academy of Sciences Shanghai 201800 China.
³ University of Chinese Academy of Sciences Beijing 100049 China.

Abstract

The low-pressure distillation of FLiBe salt containing ThF₄ was carried out at 1223 K and <10 Pa using thermogravimetric equipment. The weight loss curve indicated a rapid distillation stage at the beginning of distillation, followed by a slow stage. The composition and structure analyses showed that the rapid distillation process originated from the evaporation of LiF and BeF₂, while the slow distillation process was mainly attributed to the evaporation of ThF₄ and LiF complexes. Precipitation-distillation coupled method was employed for the recovery of FLiBe carrier salt. XRD analysis indicated that ThO₂ was formed and remained in the residue with the addition of BeO. Our results showed that the combination of precipitation and distillation treatment was an effective way to recover carrier salt.