公开(公告)号：DE10238995A1

公开(公告)日：2004-02-26

申请号：DE10238995

申请日：2002-08-20

Applicant: BASF AG

Inventor： WOELFERT ANDREAS ,  MUELLER CHRISTIAN ,  STROEFER ECKHARD ,  WEBER MARKUS ,  PFEFFINGER JOACHIM ,  KNOESCHE CARSTEN

IPC: C07B43/10 ,  C07C263/10 ,  C07C265/12 ,  C07C265/14 ,  C08G73/00

Abstract: A method for the production of aromatic di-isocyanates (I) by gas-phase reaction of phosgene with diamines involves carrying out the reaction in a reaction zone under a pressure of more than 3 bar and less than 20 bar. An Independent claim is also included for a production unit for this process, in which the ratio of production capacity to phosgene hold-up is more than 3200 tonnes di-isocyanate per annum/kg phosgene.

公开(公告)号：DE10116316A1

公开(公告)日：2002-10-24

申请号：DE10116316

申请日：2001-04-02

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  SOHN MARTIN ,  LANGENSIEPEN HANS-WERNER ,  MUELLER CHRISTIAN ,  KRUG GEORG ,  KEMPER REINHARD

IPC: C07C209/78 ,  C07C211/50 ,  C07C209/60

Abstract: A process for the production of 4,4'-diaminoditolylmethane comprises reaction of o-toluidine with formaldehyde in the presence of an acid catalyst whereby the ratio of acid catalyst to o-toluidine is 0.8-1.2 equivalents of acid per mole of o-toluidine. providing a process for the production of 4,4'-diaminoditolylmethane.

公开(公告)号：DE10027778A1

公开(公告)日：2001-12-13

申请号：DE10027778

申请日：2000-06-07

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  MUELLER CHRISTIAN ,  SOHN MARTIN ,  KAIBEL GERD

IPC: C08G4/00 ,  C08G12/06 ,  C08L59/00 ,  C08L61/22 ,  C08L61/32

Abstract: Production of amine-formaldehyde condensate involves fractionating a mixture of polyoxymethylene glycols, formaldehyde, methylene glycol and water in a reaction column and reacting the reactive fraction with a countercurrent of amine in the same column. Production of amine-formaldehyde condensates (I) by reacting: (a) amine(s); with (b) a mixture containing: (i) poly-oxymethylene glycols; (ii) monomeric formaldehyde; (iii) methylene glycol; and (iv) water. The method involves fractionation of mixture the, followed by reaction with the amine in a reaction column. The amine and that part of the fractionated mixture (b) which reacts with (a) move in countercurrent to one another.