Recovering low-turbidity cutting liquid from silicon slurry waste

Evolution and present status of silicon carbide slurry recovery in silicon wire sawing

“…As attempts to get clear PEG by filtration or high speed centrifugation did not succeed (9, 10, 14, 15), dilution with PEG was not tried in these patents. Difficulties in filtering the centrate have been discussed by Tsai and Shih (2014). They diluted centrate with water and allowed the diluted liquid to settle, getting a clear liquid in 21 days.…”