Patent ID: 6511604
Filing Date: 2003-01-28
Classification: B01D,Y10S

Abstract:
A method of separating polychlorobiphenyl (PCB) from a PCB-containing waste oil which contains PCB having a different solidifying point than the remaining waste oil, comprising the steps of:cooling the PCB-containing waste oil to a temperature at which PCB is solidified while the remaining waste oil is not solidified, wherein said cooling step includes transferring said waste oil to a primary liquid cooling tank, a secondary cooling tank, and a third cooling tank, to prevent the solidified PCB from being redissolved; contacting the waste oil containing the solidified PCB with a filter aid to which the solidified PCB binds; separating the PCB-bound filter aid from the remaining waste oil by filtration; and eluting the PCB from said PCB-bound filter aid to separate the PCB.