Synergistic strategies for defluoridation from RECl3-AlCl3-F complex solution: pH regulation and hydrolysis coprecipitation of aluminum by Ca2Al(OH)6Cl·2H2O

Excessive fluoride and complex Al-F complex-ions severely impede the efficient extraction of rare earth elements (REEs) from rare earth chloride (RECl 3 ) solution. Herein, hydrated calcium chloroaluminate (Ca 2 Al(OH) 6 Cl·2H 2 O) was prepared via...