中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

75 records (took 0.023 seconds)

    31.
    发明专利
    未知

    公开(公告)号：DE50302921D1

    公开(公告)日：2006-05-18

    申请号：DE50302921

    申请日：2003-11-11

    Applicant: BASF AG

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

    IPC: C07D201/16 ,  C07D201/08

    Abstract: A process for the purification of crude caprolactam, prepared by reaction of a mixture comprising 6-aminocapronitrile and water, comprises a three stage distillation process with feeding of the crude caprolactam and an inorganic acid having a b. pt. above the b. pt. of the caprolactam to a first distillation column. A process for the purification of crude caprolactam, prepared by reaction of a mixture comprising 6-aminocapronitrile and water in the presence of a catalyst to form a mixture comprising caprolactam, ammonia, water and high and low b. pt. byproducts followed by removal of ammonia to yield a mixture of caprolactam, water and high and low b. pt. byproducts followed by at least partial removal of water to yield a crude caprolactam containing caprolactam and high and low b. pt. byproducts, comprises: (a) feeding of the crude caprolactam and an inorganic acid having a b. pt. above the b. pt. of the caprolactam to a first distillation column; (b) distillation of the crude caprolactam and inorganic acid to form a sump stream and an overhead stream; (c) feeding of the overhead stream to a second distillation column; (d) distillation of the stream to form a sump stream and overhead stream; (e) feeding of the overhead stream to a third distillation column; (f) distillation of the overhead stream to form a sump stream and purified caprolactam in the overhead stream; and (g) feeding of the sump stream to the first distillation column.

    PROCEDIMIENTO PARA LA OBTENCION DE UN ACIDO DICARBOXILICO PARTIENDO DE ACIDO ACRILICO
    33.
    发明专利
    PROCEDIMIENTO PARA LA OBTENCION DE UN ACIDO DICARBOXILICO PARTIENDO DE ACIDO ACRILICO 未知

    公开(公告)号：AR041007A1

    公开(公告)日：2005-04-27

    申请号：ARP030102445

    申请日：2003-07-08

    Applicant: BASF AG

    Inventor： BASSLER P ,  MAIXNER STEFAN ,  SCHEIDEL J

    IPC: C07C51/09 ,  C07C51/36 ,  C07C67/10 ,  C07C67/303 ,  C07C67/343

    Abstract: Procedimiento para la obtención de un ácido dicarboxílico de la fórmula (1) en donde x: es igual a 6 ó 8 partiendo de ácido acrílico, que comprende: a) se hace reaccionar un diéster de ácido dicarboxílico de la fórmula (2) en donde x es igual a 6 ó 8; y R1, R2 significan, independientemente, alquilo con 1, 2, 3 y 4 átomos de carbono, arilo, heteroarilo, y pueden ser radicales iguales o diferentes; con ácido acrílico, obteniéndose un ácido dicarboxílico de la fórmula (1) y una mezcla de ésteres de ácido acrílico de la fórmula C2H3-COOR1 y C2H3-COOR2 en donde R1 y R2 tienen los significados indicados: b) se separa el ácido dicarboxílico de la fórmula (1) obtenido en la etapa a) de la mezcla de reacción obtenida en la etapa a); c) se dimerizan los C2H3-COOR1, C2H3-COOR2 o sus mezclas obtenidos en la etapa a), obteniéndose diésteres de ácido n-butenodicarboxílico, y d) se disocian los diésteres de ácido dicarboxílico obtenidos en la etapa c) en al ácido dicarboxílico correspondiente de la fórmula (1).

    Purification of crude caprolactam comprises a three stage distillation process with feeding of the crude caprolactam and an inorganic acid having a b. pt. above the b. pt. of the caprolactam to a first distillation column
    35.
    发明专利
    Purification of crude caprolactam comprises a three stage distillation process with feeding of the crude caprolactam and an inorganic acid having a b. pt. above the b. pt. of the caprolactam to a first distillation column 未知

    公开(公告)号：DE10253094A1

    公开(公告)日：2004-05-27

    申请号：DE10253094

    申请日：2002-11-13

    Applicant: BASF AG

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

    IPC: C07D201/16 ,  C07D223/10

    Abstract: A process for the purification of crude caprolactam, prepared by reaction of a mixture comprising 6-aminocapronitrile and water, comprises a three stage distillation process with feeding of the crude caprolactam and an inorganic acid having a b. pt. above the b. pt. of the caprolactam to a first distillation column. A process for the purification of crude caprolactam, prepared by reaction of a mixture comprising 6-aminocapronitrile and water in the presence of a catalyst to form a mixture comprising caprolactam, ammonia, water and high and low b. pt. byproducts followed by removal of ammonia to yield a mixture of caprolactam, water and high and low b. pt. byproducts followed by at least partial removal of water to yield a crude caprolactam containing caprolactam and high and low b. pt. byproducts, comprises: (a) feeding of the crude caprolactam and an inorganic acid having a b. pt. above the b. pt. of the caprolactam to a first distillation column; (b) distillation of the crude caprolactam and inorganic acid to form a sump stream and an overhead stream; (c) feeding of the overhead stream to a second distillation column; (d) distillation of the stream to form a sump stream and overhead stream; (e) feeding of the overhead stream to a third distillation column; (f) distillation of the overhead stream to form a sump stream and purified caprolactam in the overhead stream; and (g) feeding of the sump stream to the first distillation column.

    METHOD FOR THE PRODUCTION OF A DICARBOXYLIC ACID FROM ACRYLIC ACID
    36.
    发明专利
    METHOD FOR THE PRODUCTION OF A DICARBOXYLIC ACID FROM ACRYLIC ACID 未知

    公开(公告)号：AU2003238065A1

    公开(公告)日：2004-02-02

    申请号：AU2003238065

    申请日：2003-07-04

    Applicant: BASF AG

    Inventor： SCHEIDEL JENS ,  BASSLER PETER ,  MAIXNER STEFAN

    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).

    38.
    发明专利
    未知

    公开(公告)号：BR0110453A

    公开(公告)日：2003-03-11

    申请号：BR0110453

    申请日：2001-04-30

    Applicant: BASF AG

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

    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 formula (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, R and R represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups, by reacting a compound of the formula (I), wherein R , R , m and n have the meaning indicated above, and R represents nitrile groups, carboxylic acid amide groups and carboxylic acid groups, with water vapor in the gaseous phase. The inventive method is further 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 under 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 phase (V) from phase (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 CYCLIC LACTAMS
    39.
    发明专利
    METHOD FOR PRODUCING CYCLIC LACTAMS 未知

    公开(公告)号：CA2407812A1

    公开(公告)日：2002-10-30

    申请号：CA2407812

    申请日：2001-04-30

    Applicant: BASF AG

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

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

    Abstract: The invention relates to a method for producing cyclic lactams of formula (I I) by reacting a compound (I) of formula (I) with water in the presence of an organic, liquid dilution agent in the liquid phase. In formula (II), n and m respectively can have the values 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 and R1 and R2 represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups. In formula (I), R1, R2, m and n are defined as above and R represents nitrile, carboxylic acid amide and carboxylic acid groups. The inventive method is characterized in that a) compound (I) is reacted with water in the liquid phase in the presence of an organic, liquid dilution agent (III) to form a mixture (IV) containing a lactam (II) and said mixture (IV) is subjected to an aqueous treatment to obtain a two-phase system.

Patent Agency Ranking