Extracting B2O3 from calcined boron mud using molten sodium hydroxide

摘要: Extracting B2O3 from calcined boron mud (CBM) was studied. The effect of factors such as reaction temperature and NaOH-to-CBM mass ratio on extraction efficiency investigated. results show that increasing increases efficiency. There are two stages for the extracting process: 0–20 min is first stage, which rapid; 20–50 second slower than stage. overall process follows shrinking core model, determined to obey surface chemical model diffusion through products layer respectively. activation energies calculated be 41.74 15.43 kJ·mol−1, kinetics equations also obtained.