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    1.
    发明专利
    未知

    公开(公告)号：DE19804023A1

    公开(公告)日：1999-08-05

    申请号：DE19804023

    申请日：1998-02-02

    Applicant: BASF AG

    Inventor： MOHRSCHLADT RALF DR ,  HILDEBRANDT VOLKER DR ,  FUCHS EBERHARD DR

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16 ,  C08G69/28 ,  C08K3/00 ,  C08K3/011

    Abstract: The invention relates to a continuous method for producing a polyamide, comprising the following steps: (1) reaction of at least one aminonitrile with water at a temperature of between 90 and 400 DEG C and a pressure of between 0.1 and 35 x 10 Pa in a tubular flow reactor containing a Bronsted acid catalyst selected from a beta zeolite, sheet silicate or titanium dioxide catalyst; (2) further reaction of the reaction mixture at a temperature of between 150 and 400 DEG C and a pressure which is lower than the pressure in step 1, where the temperature and pressure are selected such that a first gaseous phase and a first liquid or first solid phase or a mixture of a first solid and first liquid phase is obtained, and the first gaseous phase is separated; and (3) addition of the first liquid and/or first solid phase to a gaseous or liquid phase containing water, at a temperature of between 150 and 370 DEG C and a pressure of between 0.1 and 30 x 10 Pa, resulting in a product mixture.

    5.
    发明专利
    未知

    公开(公告)号：DE19804014A1

    公开(公告)日：1999-08-05

    申请号：DE19804014

    申请日：1998-02-02

    Applicant: BASF AG

    Inventor： MOHRSCHLADT RALF DR ,  HILDEBRANDT VOLKER DR

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16

    Abstract: The invention relates to a discontinuous method for producing a polyamide by reacting a mixture containing at least one aminonitrile and possibly monomers suitable for producing polyamides with water. Said method consists of the following steps: (1) reacting the mixture with water at a temperature of between 90 and 400 DEG C and a pressure of between 0.1 and 35 x 10 Pa, resulting in a reaction mixture; (2) further reacting the reaction mixture at a temperature of between 150 and 400 DEG C and a pressure which is lower than the pressure in step (1), whereby the temperature and pressure are selected in such a way that a first gaseous phase and a first liquid phase or a first solid phase or a mixture of the first solid and first liquid phase are obtained, and that the first gaseous phase is separated from the first liquid or first solid phase or from the mixture of the first liquid and first solid phase; and (3) mixing the first liquid or first solid phase or the mixture of the first liquid and first solid phase with a gaseous or liquid phase containing water, at a temperature of between 150 and 370 DEG C and a pressure of between 0.1 and 30 x 10 Pa, which yields a product mixture. According to the method step (1) is carried out in the presence of a Bronsted acid catalyst, selected from a beta-zeolite, sheet-silicate or solid-bed catalyst, consisting essentially of TiO2 with between 70 and 100 weight percent anatase and between 0 and 30 weight percent rutile, in which up to 40 weight percent of the titanium dioxide can be substituted with tungsten oxide, and steps (2) and (3) can be carried out in the presence of said catalyst.

    7.
    发明专利
    未知

    公开(公告)号：DE19804033A1

    公开(公告)日：1999-08-05

    申请号：DE19804033

    申请日：1998-02-02

    Applicant: BASF AG

    Inventor： MOHRSCHLADT RALF DR ,  KRAUS DIETER ,  HILDEBRANDT VOLKER DR

    IPC: C08G69/04 ,  C08G69/08 ,  C08G69/16 ,  C08G69/00

    Abstract: The invention relates to a continuous method for producing a polyamide by reacting at least one aminonitrile with water, comprising the following steps: (1) reaction of at least one aminonitrile with water at a temperature of between 90 and 400 DEG C and a pressure of between 0.1 and 15 x 10 Pa in a tubular flow reactor containing packing material of a Bronsted acid catalyst selected from beta zeolite, sheet silicate or titanium dioxide packing materials, as well as metallic packing materials, which yields a reaction mixture; (2) further reaction of the reaction mixture at a temperature of between 150 and 400 DEG C and a pressure which is lower than the pressure in step 1, where the temperature and pressure are selected such that a first gaseous phase and a first liquid or a first solid phase or a mixture of a first solid and a first liquid phase is obtained, and the first gaseous phase is separated from the first liquid or first solid phase or the mixture of the first liquid and first solid phase; and (3) addition of the first liquid or first solid phase or the mixture of first liquid and first solid phase to a gaseous or liquid phase containing water, at a temperature of between 150 and 370 DEG C and a pressure of between 0.1 and 30 x 10 Pa, resulting in a product mixture.

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