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    62.
    发明专利
    未知

    公开(公告)号：DE19500222A1

    公开(公告)日：1996-07-11

    申请号：DE19500222

    申请日：1995-01-05

    Applicant: BASF AG

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

    IPC: C07D201/02 ,  C07C209/48 ,  C07C211/12 ,  C07D201/08 ,  C07D223/10 ,  C07D233/10

    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.

    63.
    发明专利
    未知

    公开(公告)号：DE19500041A1

    公开(公告)日：1996-07-04

    申请号：DE19500041

    申请日：1995-01-03

    Applicant: BASF AG

    Inventor： RITZ JOSEF DR ,  FISCHER ROLF DR ,  SCHNURR WERNER DR ,  FUCHS EBERHARD DR ,  ACHHAMMER GUENTHER DR ,  LUYKEN HERMANN

    IPC: C07D201/08 ,  C07B63/02 ,  C07D201/16 ,  C07D223/10

    Abstract: Crude capronitrile is purified by hydrogenation, subsequent treatment in an acidic medium and subsequent distillation in an alkaline medium, by a process in which (a) 6-aminocapronitrile is converted into crude caprolactam by reaction with water, (b) high boilers and low boilers are separated off from the crude caprolactam from step (a), (c) the crude caprolactam from step (b) is treated with hydrogen at from 50 DEG to 150 DEG C. and from 1.5 to 250 bar in the presence of a hydrogenation catalyst and, if desired, of a solvent to give a mixture A, (d1) mixture A in a solvent is passed, at from 30 DEG to 80 DEG C. and from 1 to 5 bar, over an ion exchanger containing terminal acid groups to give a mixture B1, or (d2) mixture A is distilled in the presence of sulfuric acid, any solvent present being removed before the addition of the sulfuric acid, to give a mixture B2, and (e) mixture B1 or mixture B2 is distilled in the presence of a base to give pure caprolactam.

    64.
    发明专利
    未知

    公开(公告)号：DE19500040A1

    公开(公告)日：1996-07-04

    申请号：DE19500040

    申请日：1995-01-03

    Applicant: BASF AG

    Inventor： SCHNURR WERNER DR ,  WULFF-DOERING JOACHIM DR ,  FISCHER ROLF DR ,  BAEZNER RUDOLF DR

    IPC: B01J23/755 ,  C07B61/00 ,  C07C253/30 ,  C07C255/24 ,  B01J23/78

    Abstract: Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures in the presence of a catalyst in the gas phase by a process which comprises carrying out the hydrogenation with a catalyst based on at least one metal selected from the group consisting of nickel, cobalt, ruthenium and rhodium and with the proviso that the catalyst is not a powder.

    67.
    发明专利
    未知

    公开(公告)号：DE4300419A1

    公开(公告)日：1994-07-14

    申请号：DE4300419

    申请日：1993-01-09

    Applicant: BASF AG

    Inventor： FISCHER ROLF DR ,  SCHNURR WERNER DR ,  GOETZ NORBERT DR ,  KUEKENHOEHNER THOMAS DR

    IPC: B01J21/04 ,  B01J21/06 ,  B01J23/08 ,  B01J23/14 ,  B01J23/16 ,  C07D309/08 ,  C07D493/10

    Abstract: PCT No. PCT/EP93/03670 Sec. 371 Date Mar. 24, 1995 Sec. 102(e) Date Mar. 24, 1995 PCT Filed Dec. 23, 1993 PCT Pub. No. WO94/15931 PCT Pub. Date Jul. 21, 1994A process for preparing tetrahydropyran-4-carboxylic acid and its esters of the formula I (I) (R=H, C1-C8-alkyl, C3-C8-cycloalkyl, aryl, C7-C12-alkylphenyl and C7-C12-phenylalkyl) by reacting 2,7-dioxaspiro[4.4]nonane-1,6-dione IIIII),in the presence of acidic catalysts at from 150 DEG to 350 DEG C. and from 0.01 to 100 bar.

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