中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

116 records (took 0.023 seconds)

    102.
    发明专利
    未知

    公开(公告)号：DE3630614A1

    公开(公告)日：1988-03-17

    申请号：DE3630614

    申请日：1986-09-09

    Applicant: BASF AG

    Inventor： SPIEGLER WOLFGANG DR ,  HOELDERICH WOLFGANG DR ,  GOETZ NORBERT DR ,  HUPFER LEOPOLD DR ,  WILD JOCHEN DR

    IPC: A01N43/18 ,  B01J29/40 ,  B01J29/70 ,  B01J29/83 ,  B01J29/85 ,  B01J29/86 ,  C07D309/04 ,  C07D309/06 ,  C07D309/10 ,  C07D405/04 ,  C07D407/04 ,  C07D409/04 ,  C07D411/04 ,  C07D521/00

    Abstract: 4-Formyltetrahydropyrans of the general formula I (I) where R1 is hydrogen, C1-C12-alkyl, C2-C12-alkenyl, C1-C6-alkoxy-substituted C1-C12-alkyl, C4-C12-cycloalkyl, unsubstituted or substituted aryl, hetaryl or aralkyl, or an unsubstituted or substituted, saturated or unsaturated 5-membered or 6-membered ring which may be interrupted by N, O or S, are prepared by a process in which a pyran derivative of the general formula II (II) where R1 is as defined above, R2 and R3 are each OH or together are an oxygen atom and thus form an oxirane ring, and R4 is hydrogen where R2 and R3 are each OH, and is hydrogen or tert-butoxycarbonyl where R2 and R3 together are an oxygen atom, is treated at elevated temperatures with a catalyst selected from the group consisting of zeolites, phosphates, boric acid on a carrier and silica or mixtures of these. Novel 4-formyltetrahydropyrans are also proposed.

    104.
    发明专利
    未知

    公开(公告)号：DE3523181A1

    公开(公告)日：1987-01-08

    申请号：DE3523181

    申请日：1985-06-28

    Applicant: BASF AG

    Inventor： HUPFER LEOPOLD DR ,  MERGER FRANZ DR ,  BROECKER FRANZ JOSEF DR ,  FISCHER ROLF DR

    IPC: C07C45/62 ,  C07C45/67 ,  C07C47/21 ,  C07C47/232

    Abstract: 2-Methyl-2-alkenals of the formula I where R1 and R2 are each hydrogen, alkyl which may additionally carry aromatic radicals, or an aromatic radical, are prepared by isomerizing a 2-alkylacrolein of the formula II in the presence of hydrogen and of a catalyst which contains palladium and an oxide or salt of a rare earth metal as active components, at from 20 DEG to 120 DEG C. and under from 1 to 100 bar.

    106.
    发明专利
    未知

    公开(公告)号：DE3425629A1

    公开(公告)日：1986-01-16

    申请号：DE3425629

    申请日：1984-07-12

    Applicant: BASF AG

    Inventor： GOETZ NORBERT DR ,  HUPFER LEOPOLD DR ,  FRANZISCHKA WOLFGANG DR ,  REISS WOLFGANG DR ,  KOERNIG WOLFGANG DR

    IPC: C07B61/00 ,  C07C67/00 ,  C07C209/00 ,  C07C209/16 ,  C07C209/18 ,  C07C85/06 ,  C07C87/50 ,  C07C87/34 ,  C07C87/40

    Abstract: Aromatic amines (substituted anilines) of the formula R -NH2 and/or suitable cycloaliphatic amines of the formula R -NH2, in which R denotes a phenyl ring substituted by aliphatic groups having 1 to 20 carbon atoms and cycloaliphatic groups having 5 to 20 carbon atoms and R a suitably substituted cyclohexyl ring, are obtained from the corresponding phenols in the presence of a cycloaliphatic amine R -NH2, which may be recycled, with aqueous ammonia and excess hydrogen over a hydrogenation/dehydrogenation catalyst, the reaction being carried out continuously essentially at atmospheric pressure in the gas phase in at least two reaction zones connected in series in such a manner that in a first reaction zone a lower temperature and in a second reaction zone a higher temperature is maintained and/or catalysts of different reactivity are present in the reaction zones. The catalysts can be, for example, a palladium, ruthenium, rhodium or platinum catalyst or a palladium, platinum/copper or silver catalyst and are supported catalysts containing alumina as the support, which additionally may contain a basic substance and/or zinc, chromium, manganese, iron, cobalt or nickel.

Patent Agency Ranking