Continuous method for increasing the Q. I. concentration of liquid tar while concurrently producing a Q. I. free tar
 Continuous method for treating a liquid tar containing Q.I. solids to provide a liquid tar product having increased Q.I. concentration and, concurrently, a Q.I. free liquid tar product. The method utilizes cross-flow filter membranes. 
UCAR Carbon Technology Corporation
C B B B
C10C B01D B01D B01D
inventional inventional inventional inventional
Irwin C. Ching F. Richard L. Gary L. George E.
Lewis Chang Shao Gilleskie Keller, II