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    PROCESO PARA LA PURIFICACION CONTINUA DE CAPROLACTAMA IMPURA PREPARADA A PARTIR DE 6-AMICAPRONITRILO.
    3.
    发明专利
    PROCESO PARA LA PURIFICACION CONTINUA DE CAPROLACTAMA IMPURA PREPARADA A PARTIR DE 6-AMICAPRONITRILO. 未知

    公开(公告)号：MX9704864A

    公开(公告)日：1997-10-31

    申请号：MX9704864

    申请日：1995-12-22

    Applicant: BASF AG

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

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

    Abstract: La presente invencion se refiere a capronitrilo impuro el cual se purifica por hidrogenacion, un tratamiento posterior en un medio ácido y la destilacion subsecuente en un medio alcalino, mediante un proceso en el cual (a) El 6-amicapronitrilo se convierte en caprolactáma impura mediante la reaccion con agua, (b) los compuestos con punto de ebullicion elevados y los compuestos con puntos de ebullicion elevados y los compuestos con puntos de ebullicion bajos se separan de la caprolactáma impura del paso (b) se trata con hidrogeno a una temperatura de 50 a 150 degree C y de 1.5 a 250 bar en presencia de un catalizador de hidrogenacion y, si se desea, de un solvente para dar una mezcla A. (d) la mezcla A en un solvente se pasa, de 30 a 80 degree C y de 1 a 5 bar, por un intercambiador bionico que contiene gruposácidos terminales para dar una mezcla B1, o (d2) una mezcla a se destila en presencia de ácido sulfurico, cualquier solvente presente se elimina antes de la adicion del ácido sulfurico, para dar una mezcla B2 y (e) la mezcla B1 o la mezcla B2 se destilan en presencia de una base para dar caprolactáma pura.

    Process for continuously cleaning raw caprolactam made from 6-amino capronitrile
    4.
    发明专利
    Process for continuously cleaning raw caprolactam made from 6-amino capronitrile 未知

    公开(公告)号：AU4389396A

    公开(公告)日：1996-07-24

    申请号：AU4389396

    申请日：1995-12-22

    Applicant: BASF AG

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

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

    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.

    Separating and recovering cyclopentadiene
    9.
    发明专利
    Separating and recovering cyclopentadiene 未知

    公开(公告)号：GB1094992A

    公开(公告)日：1967-12-13

    申请号：GB939765

    申请日：1965-03-05

    Applicant: BASF AG

    Inventor： WEITZ HANS-MARTIN ,  KROEPER HUGO ,  WAGNER ULRICH ,  RITZ JOSEF

    IPC: C07C7/00 ,  C07C7/08 ,  C07C7/11

    Abstract: Cyclopentadiene is recovered from C5 hydrocarbon containing diolefins, prior to the separation of isoprene, by counter-current contact with sufficient selective solvent to dissolve substantially only the cyclopentadiene, the solvent being a heterocyclic compound having a nitrogen or oxygen heteroatom adjacent to a single carbonyl group, contacting the resultant solution with an inert liquid or gas to remove dissolved diolefins other than cyclopentadiene and expelling cyclopentadiene from the remaining solution; recovered solvent may be recycled preferably after removing cyclopentadiene dimer from a bleed stream. The solvent may be a lactam, lactone, N-alkyllactam, N-hydroxyalkyllactam, N-acylpyrrolidine or N-acylpiperidine, and may contain up to 40% of water; preferably the same solvent is used in the subsequent isoprene recovery. In a preferred embodiment the mixture as a gas enters tower 1 by line 4 and the solvent by line 5. The solution is passed to tower 2 where it is contacted with an inert gas, e.g. cyclopentadiene, hydrocarbons less soluble than diolefins, nitrogen or steam; in an example C5 gas from the process after removal of isoprene enters by line 8 and steam by line 9. In the absence of steam, heat may also be applied. The gases obtained are returned to tower 1 by line 4. From the bottom solution then enters tower 3 where it is heated to expel cyclopentadiene recovered as a side stream 10. Overhead gases may be returned to tower 2 as all or part of the stripping gas. The gas-liquid absorption step may be replaced by liquid-liquid absorption using a counter-solvent (hydrocarbons) or anti-solvent (water) introduced near the point of removal of solution, or by an extractive distillation.

    METHOD OF CONTINUOUSLY PURIFING CRUDE CAPROLAKTAM OBTAINED FROM 6-AMINOCAPRONITRILE
    10.
    发明专利
    METHOD OF CONTINUOUSLY PURIFING CRUDE CAPROLAKTAM OBTAINED FROM 6-AMINOCAPRONITRILE 未知

    公开(公告)号：PL186443B1

    公开(公告)日：2004-01-30

    申请号：PL32116295

    申请日：1995-12-22

    Applicant: BASF AG

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

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

    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.

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