12.
    发明专利
    未知

    公开(公告)号:DE502004001613D1

    公开(公告)日:2006-11-09

    申请号:DE502004001613

    申请日:2004-03-19

    Applicant: BASF AG

    Abstract: Polyamides, oligomers thereof or mixtures thereof, if required with further reaction products, are prepared by reacting aminonitriles or dinitriles and diamines or a mixture containing aminonitrile, dinitrile and diamine, and, if required, further polyamide-forming monomers and/oligomers with water in a reactor ( 1 ) having a vertically oriented longitudinal axis, by a process in which, in the reactor ( 1 ), the reaction product is removed from the bottom and ammonia formed and any further low molecular weight compounds formed and water are taken off via the top ( 2 ), wherein the reactor ( 1 ) has at least two chambers ( 4 ) arranged one on top of the other in the longitudinal direction, the chambers ( 4 ) being separated from one another by liquid-tight trays ( 5 ), each chamber ( 4 ) being connected by a liquid overflow ( 6 ) to the chamber ( 4 ) directly underneath and a liquid product stream being taken off by the liquid overflow ( 6 ) of the lowermost chamber ( 4 ), the gas space ( 7 ) above the liquid level in each chamber ( 4 ) being connected to the chamber ( 4 ) arranged directly above in each case by one or more conduit pipes ( 8 ) which in each case opens or open into a gas distributor ( 9 ) having orifices ( 11 ) for gas exit below the liquid level, and comprising in each case at least one baffle plate ( 12 ) which is arranged vertically around each gas distributor ( 9 ) and whose upper end terminates below the liquid level and whose lower end terminates above the liquid-tight tray ( 5 ) of the chamber ( 4 ) and which separates each chamber ( 4 ) into one or more gassed ( 13 ) and into one or more ungassed ( 14 ) spaces.

    13.
    发明专利
    未知

    公开(公告)号:AT340819T

    公开(公告)日:2006-10-15

    申请号:AT04721865

    申请日:2004-03-19

    Applicant: BASF AG

    Abstract: Polyamides, oligomers thereof or mixtures thereof, if required with further reaction products, are prepared by reacting aminonitriles or dinitriles and diamines or a mixture containing aminonitrile, dinitrile and diamine, and, if required, further polyamide-forming monomers and/oligomers with water in a reactor ( 1 ) having a vertically oriented longitudinal axis, by a process in which, in the reactor ( 1 ), the reaction product is removed from the bottom and ammonia formed and any further low molecular weight compounds formed and water are taken off via the top ( 2 ), wherein the reactor ( 1 ) has at least two chambers ( 4 ) arranged one on top of the other in the longitudinal direction, the chambers ( 4 ) being separated from one another by liquid-tight trays ( 5 ), each chamber ( 4 ) being connected by a liquid overflow ( 6 ) to the chamber ( 4 ) directly underneath and a liquid product stream being taken off by the liquid overflow ( 6 ) of the lowermost chamber ( 4 ), the gas space ( 7 ) above the liquid level in each chamber ( 4 ) being connected to the chamber ( 4 ) arranged directly above in each case by one or more conduit pipes ( 8 ) which in each case opens or open into a gas distributor ( 9 ) having orifices ( 11 ) for gas exit below the liquid level, and comprising in each case at least one baffle plate ( 12 ) which is arranged vertically around each gas distributor ( 9 ) and whose upper end terminates below the liquid level and whose lower end terminates above the liquid-tight tray ( 5 ) of the chamber ( 4 ) and which separates each chamber ( 4 ) into one or more gassed ( 13 ) and into one or more ungassed ( 14 ) spaces.

    METHOD FOR THE PRODUCTION OF POLYAMIDES

    公开(公告)号:CA2535488A1

    公开(公告)日:2005-03-03

    申请号:CA2535488

    申请日:2004-07-15

    Applicant: BASF AG

    Abstract: Disclosed is a method for producing polyamides and the oligomers or mixtures thereof, optionally with additional reaction products, by reacting a reactio n mixture containing monomers that comprise CN groups or -CONH2 groups, other optional polyamide-forming monomers and/or oligomers, and water in a device. Said method is characterized in that the surfaces of the device, which enter in contact with the reaction mixture, are entirely or partly made of a material that is selected among a group comprising: a) an austenitic steel containing 15 to 25 percent by weight of chromium, 3 to 35 percent by weight of nickel, 0 to 10 percent by weight of molybdenum, and other optional alloy components, the balance being made up of iron and the percentages by weight being in relation to a); b) a duplex steel containing 20 to 30 percent by weight of chromium, 3 to 10 percent by weight of nickel, 0 to 5 percent by weight of molybdenum, and other optional alloy components, the balance being made up of iron and the percentages by weight being in relation to b); and c ) a basic nickel alloy containing 12 to 25 percent by weight of chromium, 12 t o 20 percent by weight of molybdenum, and other optional alloy components, the balance being made up of nickel and the percentages being in relation to c). Also disclosed are devices that are used in or intended for such a method.

    PROCEDIMIENTO PARA LA OBTENCION DE POLIAMIDAS

    公开(公告)号:AR045281A1

    公开(公告)日:2005-10-19

    申请号:ARP040102972

    申请日:2004-08-19

    Applicant: BASF AG

    Abstract: Procedimiento para obtención de poliamidas, sus oligómeros o mezclas de los mismos, en caso dado, con otros productos de reacción, por reacción de una mezcla de reacción, que contiene monómeros conteniendo grupos -CN o grupos -CONH2 y, opcionalmente, otros monómeros y/u oligómeros formadores de poliamida y agua, en un dispositivo, caracterizado porque las superficies del dispositivo que entran en contacto con la mezcla de reacción constan parcial o completamente de un material seleccionado entre el grupo que comprende: a) un acero austenítico, que contiene, cada vez con respecto a a), cromo, en un margen de 15 a 25 % en peso, níquel, en un margen de 3 a 25 % en peso y molibdeno, en un margen de 0 a 10 % en peso, opcionalmente, otros componentes de aleación diferentes, resto ad 100 % en peso de hierro; b) un acero dúplex, que contiene, cada vez con respecto a b), cromo, en un margen de 20 a 30 % en peso, níquel, en un margen de 3 a 10 % en peso y molibdeno, en un margen de 0 a 5 % en peso, opcionalmente, otros componentes de aleación diferentes, resto ad 100 % en peso de hierro; y c) una aleación básica de níquel, que contiene, cada vez con respecto a c), cromo, en un margen de 12 a 25 % en peso, molibdeno, en un margen de 12 a 20 % en peso, opcionalmente, otros componentes de aleación diferentes, resto ad 100 % en peso de níquel, y dispositivos, usados en un procedimiento de este tipo o destinados a ser usados en un procedimiento de este tipo.

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