The recovered Si can become SoG-Si if processed properly. However, the proposed process had some disadvantages associated with concentration, including use of toxic heavy liquid, long processing time and inability to remove the submicron SiC particles. Therefore, a more effective method to replace centrifugation is needed. Lin and Tai [26] studied the recovery of silicon from kerfs loss slurry by a phase-transfer separation method. The recovery of Si and SiC particles from the powder mixture was carried out in two stages after the kerfs loss slurry was washed with acetone and nitric acid. In either stage of separation, oil was added to aqueous slurry of the two particles.