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.

公开(公告)号：FI941397A

公开(公告)日：1994-09-26

申请号：FI941397

申请日：1994-03-25

Applicant: BASF AG

Inventor： ZEHNER PETER ,  BITTINS KLAUS ,  HAARDE WILHELM ,  EIDEN ULRICH ,  WOLFF DIETRICH ,  HERR MANFRED ,  HUPFER LEOPOLD

IPC: C07B61/00 ,  C07C67/36 ,  B01J31/02 ,  C07C69/06

Abstract: Methyl formate is prepared by reaction of carbon monoxide and methanol at elevated pressure and elevated temperature in the presence of an alkali metal methoxide by A) mixing the starting substances in a mixing zone, partially allowing them to react, saturating the reaction solution with CO and B) carrying the reaction to completion in one or more subsequent reaction zones without addition of further starting compounds.