公开(公告)号：EP0946675A1

公开(公告)日：1999-10-06

申请号：EP97944325.0

申请日：1997-09-24

申请人： UCAR CARBON TECHNOLOGY CORPORATION

发明人： ORAC, Thomas, Harry ,  CHANG, Ching, Feng ,  LEWIS, Irwin, Charles ,  SHAO, Richard, Liichang

IPC分类号： C10C1

CPC分类号： C10C1/00 ,  C10C1/16

摘要： A process for converting coal tar containing quinoline-insoluble particles (Q.I.) produces a substantially Q.I.-free coal tar pitch and a separate Q.I.-containing coal tar pitch. Dehydrated coal tar, soft coal tar pitch or hard coal tar pitch are subjected to continuous cross flow filtration in a circulation loop to obtain a substantially Q.I.-free stream and, concurrently, a Q.I.-containing stream. The two streams are then separately subjected to further fractionation, if any, to produce the substantially Q.I.-free hard coal tar pitch and separate Q.I.-containing hard coal tar pitch.