... regenerating the waste engine oil, this equipment can effective separate water, gas, particles, deeply oxides, free carbon, colloid, asphalt and wax ... filter and vacuum degassing, dewatering to remove the odor and water. 3.Closed type filtering system use stainless steel mesh, reliable ... /T 7304 Impurities(%) ≤ 0.01 0.005 GB/T 511 Water soluble acid/alkali — — GB/T 259