One-step synthesis of high-purity Li2BeF4 molten salt

• The sulfate ions in (NH4)2BeF4 can be effectively removed.
• Highly pure Li2BeF4 can be synthesized in one step.
• The preparation of Li2BeF4 is safe and convenient.

(NH4)2BeF4 was synthesized and purified by recrystallization to remove sulfate ions before being used as the main raw material to prepare Li2BeF4 molten salt. (NH4)2BeF4 was heated and melted with LiF at high temperature to produce Li2BeF4 molten salt without separate BeF2 preparation by pyrolysis. The obtained salt has a melting point of 458–460 °C and an oxygen content below 500 ppm. The main impure metal ion and anion concentrations are less than 10 ppm and 80 ppm, respectively. This is a convenient, efficient and economical preparative method for high-purity Li2BeF4 molten salt.

Figure optionsDownload as PowerPoint slide