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    3.
    发明专利
    未知

    公开(公告)号：DE50304582D1

    公开(公告)日：2006-09-21

    申请号：DE50304582

    申请日：2003-05-21

    Applicant: BASF AG

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

    IPC: C07C253/34 ,  C07C209/84 ,  C07C211/09 ,  C07C211/12 ,  C07C255/09 ,  C07C255/24

    Abstract: A process for reducing the level of an aliphatic monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) or a diamine (II) or a dinitrile (III) or mixtures thereof as well as said mine (IV) by a) reacting said mixture (V) with an anionic nucleophile (VI) which contains a nucleophilic atom selected from the group consisting of oxygen, nitrogen and sulfur, which is capable of taking up an H + ion to form an acid having a pK a value in the range from 7 to 11, as measured in water at 25° C., and which has a relative nucleophilicity, as measured in methyl perchlorate/methanol at 25° C., in the range from 3.4 to 4.7 when said nucleophilic atom is oxygen, in the range from 4.5 to 5.8 when said nucleophilic atom is nitrogen, and in the range from 5.5 to 6.8 when said nucleophilic atom is sulfur, in an amount in the range from 0.01 to 10 mol per mole of said amine (IV) in said mixture (V) at a temperature in the range from 50 to 200° C. to obtain a mixture (VII), b) distilling said aminonitrile (I) or said diamine (II) or said dinitrile (III) or mixtures thereof from said mixture (VII) at a temperature in the range from 50 to 200° C. and at a pressure in the range from 0.1 to 100 kPa to obtain a bottom product (VIII), which comprises c) distilling an aminonitrile (I) or diamine (II) or dinitrile (III) or mixtures thereof from said bottom product (VIII) at a temperature which is lower than that chosen in step b).

    4.
    发明专利
    未知

    公开(公告)号：AT335720T

    公开(公告)日：2006-09-15

    申请号：AT03755046

    申请日：2003-05-21

    Applicant: BASF AG

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

    IPC: C07C209/84 ,  C07C211/09 ,  C07C211/12 ,  C07C253/34 ,  C07C255/09 ,  C07C255/24

    Abstract: A process for reducing the level of an aliphatic monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) or a diamine (II) or a dinitrile (III) or mixtures thereof as well as said mine (IV) by a) reacting said mixture (V) with an anionic nucleophile (VI) which contains a nucleophilic atom selected from the group consisting of oxygen, nitrogen and sulfur, which is capable of taking up an H + ion to form an acid having a pK a value in the range from 7 to 11, as measured in water at 25° C., and which has a relative nucleophilicity, as measured in methyl perchlorate/methanol at 25° C., in the range from 3.4 to 4.7 when said nucleophilic atom is oxygen, in the range from 4.5 to 5.8 when said nucleophilic atom is nitrogen, and in the range from 5.5 to 6.8 when said nucleophilic atom is sulfur, in an amount in the range from 0.01 to 10 mol per mole of said amine (IV) in said mixture (V) at a temperature in the range from 50 to 200° C. to obtain a mixture (VII), b) distilling said aminonitrile (I) or said diamine (II) or said dinitrile (III) or mixtures thereof from said mixture (VII) at a temperature in the range from 50 to 200° C. and at a pressure in the range from 0.1 to 100 kPa to obtain a bottom product (VIII), which comprises c) distilling an aminonitrile (I) or diamine (II) or dinitrile (III) or mixtures thereof from said bottom product (VIII) at a temperature which is lower than that chosen in step b).

    5.
    发明专利
    未知

    公开(公告)号：BR0311504A

    公开(公告)日：2005-02-22

    申请号：BR0311504

    申请日：2003-07-04

    Applicant: BASF AG

    Inventor： BASSLER PETER ,  MAIXNER STEFAN ,  SCHEIDEL JENS

    IPC: C07B61/00 ,  C07C51/09 ,  C07C51/36 ,  C07C55/14 ,  C07C67/10 ,  C07C67/303 ,  C07C67/347 ,  C07C69/44 ,  C07C67/343

    Abstract: A process for the preparation of a dicarboxylic acid of the formula (I) -H-OOC-(n-C 4 H x )-COO-H (I) where x is 6 or 8, starting from acrylic acid, which comprises a) reacting a dicarboxylic acid diester of the formula (II) R 1 -OOC-(n-C 4 H x )-COO-R 2 (II) where x is 6 or 8, and R 1 and R 2 , independently of one another, are C 1 -, C 2 -, C 3 - or C 4 -alkyl, aryl or heteroaryl and may be identical to or different from one another, with acrylic acid to give a dicarboxylic acid of the formula (I) and a mixture of acrylic acid esters of the formulae C 2 H 3 -COOR 1 and C 2 H 3 -COOR 2 , where R 1 and R 2 are as defined above, b) separating the dicarboxylic acid of the formula (I) obtained in step a) from the reaction mixture obtained in step a), c) dimerizing the C 2 H 3 -COOR 1 , C 2 H 3 -COOR 2 or mixture thereof obtained in step a) to give an n-butenedicarboxylic acid diester, and d) cleaving the dicarboxylic acid diester obtained in step c) into the corresponding dicarboxylic acid of the formula (I).

    6.
    发明专利
    未知

    公开(公告)号：DE10253095A1

    公开(公告)日：2004-06-17

    申请号：DE10253095

    申请日：2002-11-13

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  LUYKEN HERMANN ,  ANSMANN ANDREAS ,  BASLER PETER ,  BENISCH CHRISTOPH ,  MAIXNER STEFAN ,  MELDER JOHANN-PETER

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

    Abstract: A process for removing high boilers from crude caprolactam which comprises high boilers, caprolactam and in some cases low boilers, and which has been obtained by a) reacting 6-aminocapronitrile with water to give a reaction mixture b) removing ammonia and unconverted water from the reaction mixture to obtain crude caprolactam, which comprises c) feeding the crude caprolactam to a distillation apparatus to obtain a first substream via the top as a product and a second substream via the bottom, by setting the pressure in the distillation in such a way that the bottom temperature does not go below 170° C., and adjusting the second substream in such a way that the caprolactam content of the second substream is not less than 10% by weight, based on the entire second substream.

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