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    21.
    发明专利
    未知

    公开(公告)号：BR9709470A

    公开(公告)日：1999-08-10

    申请号：BR9709470

    申请日：1997-05-30

    Applicant: BASF AG

    Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

    IPC: C07D211/58 ,  C07D211/56 ,  C07D221/20

    Abstract: PCT No. PCT/EP97/02822 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 30, 1997 PCT Pub. No. WO97/46529 PCT Pub. Date Dec. 11, 1997A process for purifying crude piperidines of the formula I where R1 to R4 are C1-C6-alkyl, or R1 and R2 and/or R3 and R4 together are a CH2-chain of 2 to 5 carbons, which comprises, in a first step, removing high-boiling substances and, if present, water from the crude piperidines by distillation; in a second step, adding from 0.01 to 5% by weight, based on the product of the first step, as a reducing agent; and, in a third step, isolating the piperidines by distillation.

    22.
    发明专利
    未知

    公开(公告)号：BR9608495A

    公开(公告)日：1999-07-06

    申请号：BR9608495

    申请日：1996-05-24

    Applicant: BASF AG

    Inventor： HOLDERBAUM MARTIN ,  BECKER KARL ,  AUMUELLER ALEXANDER ,  WITZEL TOM ,  VOIT GUIDO

    IPC: C07C253/30 ,  C07C255/41

    Abstract: PCT No. PCT/EP96/02238 Sec. 371 Date Dec. 1, 1997 Sec. 102(e) Date Dec. 1, 1997 PCT Filed May 24, 1996 PCT Pub. No. WO96/38409 PCT Pub. Date Dec. 5, 1996A process for preparing 2-cyano-3,3-diarylacrylic esters of the general formula I where R1 and R2 are hydrogen, C1-C12-alkyl groups, C-C12-alkoxy groups or di(C1-C4-alkyl)amino groups and R3 is a C4-C18-alkyl group which can be interrupted by ether-functional oxygen atoms, by reacting a benzophenone imine of the general formula II with a cyanoacetic ester of the general formula III wherein the reaction is carried out at from 20 to 60 DEG C. and, during this, the liberated ammonia is continuously removed from the reaction mixture with the aid of a stream of gas or by reducing the pressure to from 900 to 100 mbar.

    METHOD OF SYNTHESIS OF CYCLIC LACTAMS
    24.
    发明专利
    METHOD OF SYNTHESIS OF CYCLIC LACTAMS 未知

    公开(公告)号：RU2119912C1

    公开(公告)日：1998-10-10

    申请号：RU96113082

    申请日：1994-11-15

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  WITZEL TOM

    IPC: C07D201/08 ,  C07D223/10

    Abstract: FIELD: organic chemistry and chemical technology. SUBSTANCE: invention relates to a method of synthesis cyclic lactams, in part, E-caprolactam by interaction of aminocarboxylic acid nitrile with water in liquid phase in the presence of heterogeneous catalysts based on titanium dioxide, zirconium oxide, cerium oxide or aluminium oxide. Method involves the use of aminocarboxylic acid nitrile of the formula where m = 3-6 at amount 1-50% of nitrile mass in water or a mixture of water with an organic solvent. EFFECT: improved economical indices of process due to the new catalysts using. 5 cl, 4 tblt

    METHOD OF SIMULTANEOUSLY OBTAINING CAPROLAKTAM AND HEXAMETHYLENEDIAMINE
    28.
    发明专利
    METHOD OF SIMULTANEOUSLY OBTAINING CAPROLAKTAM AND HEXAMETHYLENEDIAMINE 未知

    公开(公告)号：PL321267A1

    公开(公告)日：1997-11-24

    申请号：PL32126795

    申请日：1995-12-22

    Applicant: BASF AG

    Inventor： ACHHAMMER GUENTHER ,  BASSLER PETER ,  FISCHER ROLF ,  FUCHS EBERHARD ,  LUYKEN HERMANN ,  SCHNURR WERNER ,  WITZEL TOM

    IPC: C07D201/02 ,  C07C209/48 ,  C07C211/12 ,  C07D201/08 ,  C07D223/10

    Abstract: The invention concerns the simultaneous preparation of caprolactam and hexamethylene diamine from adipodinitrile, by the following steps: (a) the adipodinitrile is partially hydrogenated, producing a mixture substantially containing 6-aminocapronitrile, hexamethylene diamine, ammonia, adipodinitrile and hexamethylene imine (= "the mixture"); (b) the mixture obtained in step (a) is distilled, producing ammonia, as the forerunnings, and a residue I, in the presence of a compound A which is inert in the distillation conditions, the ammonia not being separated totally; (c) the residue I, substantially containing "the mixture", inert compound A and ammonia, the ammonia content being less than that of the mixture used in step (b), is subjected to a second distillation, producing a mixture of the inert compound A and ammonia, as the forerunnings, and a residue II; (d) the base II, substantially containing "the mixture" and inert compound A, is subjected to distillation in a third column, producing the inert compound A, as the forerunnings, and a residue III; (e) the base III, substantially containing "the mixture" and optionally an inert compound B, is subjected to distillation in a fourth column, producing forerunnings KP1, which substantially contain hexamethylene imine, optionally inert compound B and hexamethylene diamine, and a residue IV; (f) the forerunnings KP1 are subjected in a fifth column to distillation, producing forerunnings KP2, which substantially contain hexamethylene imine and optionally inert compound B, and a residue V, which substantially contains hexamethylene diamine with a degree of purity of at least 95 %, the forerunnings KP2 being fed to the third column or optionally only partially fed to the third column, and the rest being discarded; and (g) the residue IV, substantially containing 6-aminocapronitrile and adipodinitrile, is subjected in a sixth column to distillation, producing 6-aminocapronitrile with a degree of purity of at least 95 %, as forerunnings, and adiponitrile in the residue. The resultant 6-aminocapronitrile is cyclized to form caprolactam.

    29.
    发明专利
    未知

    公开(公告)号：BR9508147A

    公开(公告)日：1997-11-04

    申请号：BR9508147

    申请日：1995-06-16

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  WITZEL TOM

    IPC: C07D201/08

    Abstract: Cyclic lactams are prepared by reacting an aminocarboxylic acid compound of the formula I H2N-(CH2)m-COR1 I where R1 is -OH, -O-C1-C12-alkyl or -NR2R3 and R2 and R3, independently of one another, are each hydrogen, C1-C12-alkyl or C5-C8-cycloalkyl and m is an integer from 3 to 12, with water by a process in which the reaction is carried out in the liquid phase using a heterogeneous catalyst.

    30.
    发明专利
    未知

    公开(公告)号：BR9408100A

    公开(公告)日：1997-08-05

    申请号：BR9408100

    申请日：1994-11-15

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  WITZEL TOM

    IPC: C07D223/10 ,  C07D201/08

    Abstract: PCT No. PCT/EP94/03782 Sec. 371 Date May 16, 1996 Sec. 102(e) Date May 16, 1996 PCT Filed Nov. 15, 1994 PCT Pub. No. WO95/14665 PCT Pub. Date Jun. 1, 1995Cyclic lactams are prepared by reacting amino carbonitriles with water in liquid phase in a fixed bed reactor in the presence of heterogeneous catalysts which have no soluble constituents under the reaction conditions.

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