公开(公告)号：DE102006024903A1

公开(公告)日：2007-11-29

申请号：DE102006024903

申请日：2006-05-24

Applicant: BASF AG

Inventor： PINKOS ROLF ,  KAIBEL GERD ,  DAHLHOFF ELLEN ,  WINDECKER GUNTHER ,  HEIMANN JENS

IPC: C07D307/60 ,  C07C55/10

Abstract: The present invention provides a process for preventing fumaric acid deposits in the preparation of maleic anhydride, comprising the following steps: a) absorption of a C4-dicarboxylic acid or of a derivative from a crude product mixture into an organic solvent or water as an absorbent, b) removal of the C4-dicarboxylic acid or of a derivative from the absorbent, the absorbent thus recovered being catalytically hydrogenated fully or partly and recycled fully or partly into the absorption stage (a).

公开(公告)号：DE502004001922D1

公开(公告)日：2006-12-14

申请号：DE502004001922

申请日：2004-07-15

Applicant: BASF AG

Inventor： FRAUENKRON MATTHIAS ,  KRUG THOMAS ,  EVERS HOLGER ,  MELDER JOHANN-PETER ,  ROETTGER RODERICH ,  SIEGERT MARKUS ,  GERLACH TILL ,  NOUWEN JAN ,  DAHLHOFF ELLEN ,  MILLER CHRISTIAN

IPC: C07C209/64 ,  C07C211/14

Abstract: Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.

公开(公告)号：AT344228T

公开(公告)日：2006-11-15

申请号：AT04741043

申请日：2004-07-15

Applicant: BASF AG

Inventor： FRAUENKRON MATTHIAS ,  KRUG THOMAS ,  EVERS HOLGER ,  MELDER JOHANN-PETER ,  ROETTGER RODERICH ,  SIEGERT MARKUS ,  GERLACH TILL ,  NOUWEN JAN ,  DAHLHOFF ELLEN ,  MILLER CHRISTIAN

IPC: C07C209/64 ,  C07C211/14

Abstract: Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.