公开(公告)号：JPS63135353A

公开(公告)日：1988-06-07

申请号：JP27945487

申请日：1987-11-06

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG ,  AICHINGER HEINRICH ,  NAEUMANN FRITZ ,  FISCHER ROLF

IPC: B01J29/08 ,  B01J29/00 ,  B01J29/035 ,  B01J29/12 ,  B01J29/40 ,  B01J29/65 ,  B01J29/86 ,  C07B61/00 ,  C07C67/333 ,  C07C69/52 ,  C07C69/533

公开(公告)号：DE3775708D1

公开(公告)日：1992-02-13

申请号：DE3775708

申请日：1987-10-30

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG ,  AICHINGER HEINRICH ,  NAEUMANN FRITZ ,  FISCHER ROLF

IPC: B01J29/08 ,  B01J29/00 ,  B01J29/035 ,  B01J29/12 ,  B01J29/40 ,  B01J29/65 ,  B01J29/86 ,  C07B61/00 ,  C07C67/333 ,  C07C69/52 ,  C07C69/533

Abstract: Prodn. of 4-pentenoate esters (I) is effected by contacting a mixt. of isomeric pentenoate esters (II) and alkanols (III) with a zeolite catalyst at elevated temp. and distilling off (I). The reaction is effected at 50-300 deg. C, esp. at 100-200 deg. C in the liq. phase or 150-250 deg. C in the gas phase, using a pentasil- or faujasite-type catalyst doped with transition metals and/or noble metals. (III) are 1-3C alkanols. The (II):(III) molar ratio is 1:0.1-10.

公开(公告)号：DE59907200D1

公开(公告)日：2003-11-06

申请号：DE59907200

申请日：1999-04-12

Applicant: BASF AG

Inventor： PENZEL ULRICH ,  SCHARR VOLKER ,  STAROSTA DIETER ,  BOESEL HILMAR ,  STROEFER ECKHARD ,  PFEFFINGER JOACHIM ,  POPLOW FRANK ,  DOSCH JUERGEN ,  SCHWARZ VOLKMAR ,  NAEUMANN FRITZ ,  VAN DEN ABEEL PETER ,  JACOBS JAN ,  NEVEJANS FILIP ,  VAN PEE WILLY

IPC: C07C263/10 ,  C07C263/20 ,  C07C265/14

Abstract: In a process for preparing mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced content of chlorinated by-products and a reduced iodine color number by two-stage reaction of the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, separation of the excess phosgene and solvent after the phosgenation is complete and thermal treatment of the reaction product, the mass ratios of phosgene to hydrogen chloride in the residence time apparatus of the second stage of the phosgenation are at the same time 10-30:1 in the liquid phase and 1-10:1 in the gas phase.

公开(公告)号：DE3638011A1

公开(公告)日：1988-05-11

申请号：DE3638011

申请日：1986-11-07

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG ,  AICHINGER HEINRICH ,  NAEUMANN FRITZ ,  FISCHER ROLF

IPC: B01J29/08 ,  B01J29/00 ,  B01J29/035 ,  B01J29/12 ,  B01J29/40 ,  B01J29/65 ,  B01J29/86 ,  C07B61/00 ,  C07C67/333 ,  C07C69/52 ,  C07C69/533 ,  B01J29/04

Abstract: A process for the preparation of 4-pentenoic acid esters by isomeration, isomeric pentenoic acid esters being treated with zeolites at elevated temperature and 4-pentenoic acid esters being removed from the reaction mixture by distillation, characterised in that pentenoic acid esters are employed mixed with alkanols.

公开(公告)号：DE19817691A1

公开(公告)日：1999-10-28

申请号：DE19817691

申请日：1998-04-21

Applicant: BASF AG

Inventor： PENZEL ULRICH ,  SCHARR VOLKER ,  STAROSTA DIETER ,  BOESEL HILMAR ,  STROEFER ECKHARD ,  PFEFFINGER JOACHIM ,  ABEEL PETER VAN DEN ,  JACOBS JAN ,  NEVEJANS FILIP ,  POPLOW FRANK ,  DOSCH JUERGEN ,  SCHWARZ HANS VOLKMAR ,  NAEUMANN FRITZ ,  PEE WILLY VAN

IPC: C07C263/10 ,  C07C263/20 ,  C07C265/14

Abstract: Surprisingly, the drawbacks of previous processes for the preparation of mixtures containing diphenylmethanediisocyanate and polyphenylene-polymethylene-polyisocyanate, e.g. high cost, excessive HCl stripping time, can be avoided by a two-stage reaction of corresponding mixtures containing diphenylmethane-diamine and polyphenylene-polymethylene-polyamine with phosgene in the presence of inert organic solvent. Mixtures containing diphenylmethanediisocyanate and polyphenylene-polymethylene-polyisocyanate (PMDI) having a decreased content of chlorinated side product and decreased iodine colour index are obtained by two-stage reaction of corresponding mixtures containing diphenylmethanediamine and polyphenylene-polymethylene-polyamine (PMDA) with phosgene in the presence of at least one inert organic solvent. The weight ratio of phosgene to HCl in the dwell time apparatus of the second phosgenation stage is (10-30):1 in the liquid phase and (1-10):1 in the gas phase. An Independent claim is included for mixtures containing diphenylmethanediisocyanate and PMDI obtainable by the above process.