In the study of Tomono et al. [30], the hydro- bromination of reagent grade silicon (RG-Si), metallurgical grade silicon (MG-Si), and kerf loss silicon (KL-Si) has been investigated in a flow reactor with and without abrasive grains of SiC under various conditions. According to the experiment results, metal impurities such as Al, Fe, and Ni were dramatically reduced in the hydrolyzed products.