公开(公告)号：DE59811148D1

公开(公告)日：2004-05-13

申请号：DE59811148

申请日：1998-12-18

Applicant: BASF AG

Inventor： STROEFER DR ,  CAESAR DR ,  PENZEL DR ,  SCHORR VOLKER ,  GMEREK KARL-HEINT ,  HASSE DR

IPC: C07C209/78 ,  C07C211/50

公开(公告)号：DE50004300D1

公开(公告)日：2003-12-11

申请号：DE50004300

申请日：2000-06-06

Applicant: BASF AG

Inventor： STROEFER DR ,  SCHOLL DR ,  HASSE PROF DR

IPC: B01D1/22 ,  C07B63/00 ,  C07C29/80 ,  C07C41/56 ,  C07C43/303 ,  C07C45/82 ,  C07C47/04 ,  C07C47/058

Abstract: A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (a) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (b) reacting one fraction with the other reactant(s) before equilibrium is completely restored. A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (1) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (2) reacting one fraction with the other reactant(s) before equilibrium is completely restored. Excluded is the reaction of a formaldehyde solution, containing polyoxymethylene glycols and optionally monomeric formaldehyde and/or methylene glycol, with aniline in presence of an acid catalyst.

公开(公告)号：DE50204071D1

公开(公告)日：2005-10-06

申请号：DE50204071

申请日：2002-11-07

Applicant: BASF AG

Inventor： STROEFER DR ,  WOSTBROCK DR ,  WEBER DR

IPC: B01D3/00 ,  A23K20/105 ,  C07B61/00 ,  C07C51/10 ,  C07C51/42 ,  C07C51/44 ,  C07C53/04 ,  C07C53/06 ,  A23K1/16

公开(公告)号：DE59911344D1

公开(公告)日：2005-01-27

申请号：DE59911344

申请日：1999-01-26

Applicant: BASF AG

Inventor： STROEFER DR ,  JACOBS JAN D ,  SEYFERT DR ,  SCHWARZ DR ,  SCHWEERS DR ,  SCHARR VOLKER ,  PENZEL DR

IPC: C07B61/00 ,  C07C209/78 ,  C07C211/45 ,  C07C211/50 ,  C07C263/10 ,  C07C265/14

Abstract: The production of methylene-di-phenylamine from aniline (A) and formaldehyde (F) with an acid catalyst (C) comprises placing (A) and possibly (C) in a reactor, feeding (F) and possibly (C) through a mixer into a circulation loop containing (A), possibly (C) and possibly (F), and heating to above 75 degrees C after adding at least 50% of the total (F). Independent claims are also included for: (a) mixtures containing methylene-di-phenylamine (MDA) obtained by this process; (b) a process for the production of polyisocyanates by phosgenation of these mixtures; (c) a process for the production of methylene-diphenylisocyanate (MDI) by phosgenation of MDA (obtained as above) at 50-150 degrees C and 0.5-10 bar, optionally in presence of inert solvent; (d) a process for the production of MDI comprising: (1) the semi-continuous process described above using a mol ratio of (A):(C) = (1:0.6)-(1:0.01) and a mol ratio of (A):(total F) = (1.7:1)-(7.2:1), in which the temperature of the circulating mixture is 20-75 degrees C and the mixture is heated for at least 0.2 hour at above 75 degrees C after adding at least 50% of the (F), (2) neutralization, (3) distillation of water and aniline, (4) phosgenation of the purified MDA as in (c) above, (5) removal of phosgene, hydrogen chloride and possibly solvent at below 150 degrees C under vacuum or inert gas, (6) removal of solvent at not above 1900 degrees C and (7) isolation of 2,2'-, 2,4'- and/or 4,4'-MDI and/or mixtures of at least two of these isomers by distillation at 2-50 mbar and 150-250 degrees C and/or by crystallization; and (e) polyisocyanates obtained by these processes.

公开(公告)号：DE50100255D1

公开(公告)日：2003-06-26

申请号：DE50100255

申请日：2001-06-08

Applicant: BASF AG

Inventor： MUELLER CHRISTIAN ,  SOHN DR ,  BETTENDORF CARL ,  VAN DEN ABEEL PETER ,  PENZEL DR ,  KRAUS DR ,  THIELE DR ,  STROEFER DR

IPC: C07C209/78 ,  C07C211/50