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    METHOD FOR PRODUCING CYCLIC LACTAMS
    202.
    发明专利
    METHOD FOR PRODUCING CYCLIC LACTAMS 未知

    公开(公告)号：CA2407813A1

    公开(公告)日：2002-10-30

    申请号：CA2407813

    申请日：2001-04-30

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  OHLBACH FRANK ,  BASSLER PETER ,  ANSMANN ANDREAS ,  MELDER JOHANN-PETER ,  MAIXNER STEFAN ,  LUYKEN HERMANN

    IPC: C07D223/10 ,  C07B61/00 ,  C07D201/08 ,  C07D207/263 ,  C07D211/76 ,  C07D225/02

    Abstract: The invention relates to a method for producing cyclic lactams of the formul a (II), wherein n and m may each represent 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n + m is at least 3, preferably at least 4, R1 and R2 represent C 1- C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups, by reacting a compound of the formula (I), wherein R1, R2, m and n have the meaning indicated above, a nd R represents nitrile groups, carboxylic acid amide groups and carboxylic aci d groups, with water vapor in the gaseous phase. The inventive method is furth er characterized in that a) the compound (I) is reacted with water vapor in the gaseous phase, adding an organic diluent (III) before or after the reaction, which diluent has a miscibility gap under certain quantitative, pressure and temperature conditions, said reaction resulting in a mixture (IV) that contains a lactam (II), b) adjusting the mixture (IV) before or after the removal of ammonia to quantitative, pressure and temperature conditions unde r which the diluent (III) and water are present in a liquid form and have a miscibility gap, and obtaining a two-phase system consisting of a phase (V) that has a higher proportion of diluent (III) than water, and a phase (VI) that has a higher proportion of water than diluent (III), c) separating phas e (V) fromphase (VI) and, d) removing from phase (V) the diluent (III) and optionally by-products selected from the group of the low-boilers, high- boilers and unreacted compound (I), and obtaining a lactam (II).

    METHOD FOR PRODUCING CAPROLACTAM FROM 6-AMINOCAPRONITRILE
    203.
    发明专利
    METHOD FOR PRODUCING CAPROLACTAM FROM 6-AMINOCAPRONITRILE 未知

    公开(公告)号：CA2407723A1

    公开(公告)日：2002-10-29

    申请号：CA2407723

    申请日：2001-04-30

    Applicant: BASF AG

    Inventor： BAUMANN DIETER ,  BASSLER PETER ,  FUCHS EBERHARD ,  FISCHER ROLF-HARTMUTH ,  MELDER JOHANN-PETER ,  OHLBACH FRANK

    IPC: C07D223/10 ,  C07B61/00 ,  C07D201/08 ,  C07D201/16

    Abstract: The invention relates to a method for producing caprolactam, characterized i n that a) a mixture (I) containing 6-aminocapronitrile and water in the liquid phase is converted into a mixture (II) containing caprolactam, ammonia, wate r, high boilers and low boilers in the presence of a catalyst; b) ammonia is th en removed from mixture (II), leaving a mixture (III) containing caprolactam, water, high boilers and low boilers; c) water is then removed from mixture (III) leaving a mixture (IV) containing caprolactam, high boilers and low boilers, and d) a solid (V) containing caprolactam is obtained from mixture (IV) by crystallization, the proportion by weight of caprolactam in the soli d (V) being greater than that in the mixture (IV).

    Method for producing caprolactam from 6-aminocapronitrile
    206.
    发明专利
    Method for producing caprolactam from 6-aminocapronitrile 未知

    公开(公告)号：AU7238201A

    公开(公告)日：2001-11-12

    申请号：AU7238201

    申请日：2001-04-30

    Applicant: BASF AG

    Inventor： BASSLER PETER ,  BAUMANN DIETER ,  FISCHER ROLF-HARTMUTH ,  FUCHS EBERHARD ,  MELDER JOHANN-PETER ,  OHLBACH FRANK

    IPC: C07D223/10 ,  C07B61/00 ,  C07D201/08 ,  C07D201/16

    Abstract: A process for the preparation of caprolactam is provided, whereina) a mixture (I) containing 6-aminocapronitrile and water is reacted in the liquid phase, in the presence of a catalyst, to give a mixture (II) containing caprolactam, ammonia, water, high-boiling components and low-boiling components,b) ammonia is then removed from the mixture (II) to give a mixture (III) containing caprolactam, water, high-boiling components and low-boiling components,c) water is then removed from the mixture (III) to give a mixture (IV) containing caprolactam, high-boiling components and low-boiling components, andd) a solid (V) containing caprolactam is then obtained from the mixture (IV) by crystallization, the proportion by weight of caprolactam in the solid (V) being greater than in the mixture (IV).

    208.
    发明专利
    未知

    公开(公告)号：BR9913191A

    公开(公告)日：2001-05-15

    申请号：BR9913191

    申请日：1999-08-17

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  BASSLER PETER ,  LUYKEN HERMANN ,  OHLBACH FRANK ,  MELDER JOHANN-PETER ,  MERGER MARTIN ,  ANSMANN ANDREAS ,  REHFINGER ALWIN ,  VOIT GUIDO

    IPC: C07B61/00 ,  C07C209/48 ,  C07C209/86 ,  C07C211/12

    Abstract: A process for catalytic hydrogenation of adiponitrile to hexamethylenediamine at elevated temperature and elevated pressure in the presence of catalysts based on elemental iron as catalytically active component and ammonia as solvent comprisesa) hydrogenating adiponitrile at from 70 to 220° C. and from 100 to 400 bar in the presence of catalysts based on elemental iron as catalytically active component and ammonia as solvent to obtain a mixture comprising adiponitrile,6-aminocapronitrile, hexamethylenediamine and high boilers until the sum total of the 6-aminocapronitrile concentration and the adiponitrile concentration is within the range from 1 to 50% by weight, based on the ammonia-free hydrogenation mixture,b) removing ammonia from the hydrogenation effluent,c) removing hexamethylenediamine from the remaining mixture,d) separating 6-aminocapronitrile and adiponitrile from high boilers individually or together, ande) returning 6-aminocapronitrile, adiponitrile or mixtures thereof into step a).

    209.
    发明专利
    未知

    公开(公告)号：BR9708765A

    公开(公告)日：1999-08-03

    申请号：BR9708765

    申请日：1997-04-03

    Applicant: BASF AG

    Inventor： SCHNURR WERNER ,  VOIT GUIDO ,  FLICK KLEMENS ,  FISCHER ROLF-HARTMUTH

    IPC: B01J23/78 ,  B01J23/94 ,  B01J27/187 ,  B01J27/28 ,  B01J38/10 ,  C07B61/00 ,  C07C209/48 ,  C07C211/12 ,  C07C253/30 ,  C07C255/24

    Abstract: A process for the coproduction of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) by treatment of adiponitrile (ADN) with hydrogen in the presence of a nickel-containing catalyst at temperatures not below room temperature and elevated hydrogen partial pressure in the presence or absence of a solvent comprises, after the conversion based on ADN and/or the selectivity based on ACN has or have dropped below a defined value (a) interrupting the treatment of ADN with hydrogen by stopping the feed of ADN and of the solvent, if used, (b) treating the catalyst at from 150 DEG to 400 DEG C. with hydrogen using a hydrogen pressure within the range from 0.1 to 30 MPa and a treatment time within the range from 2 to 48 h, and (c) then continuing the hydrogenation of ADN with the treated catalyst of stage (b).

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