公开(公告)号：BR9709367A

公开(公告)日：1999-08-10

申请号：BR9709367

申请日：1997-05-22

Applicant: BASF AG

Inventor： HUBINGER WOLFGANG ,  KELLER PETER ,  KAISER RUDOLF ,  HEIDER WOLFANG ,  EIDEN ULRICH

IPC: B01D3/22 ,  B01D19/00 ,  C08F6/00

Abstract: In the counterflown column for lowering the residual volatile substance content of dispersions, having 5 to 50 vertical and/or transverse flow filter bases, the specific free aperture area in the vertical flow filter bases is 2 to 25 % and in the transverse flow filter bases 1 to 10 %, and the mean aperture diameter is 10 to 50 mm in the vertical and 2 to 10 mm in the transverse flow filter bases.