24.
    发明专利
    未知

    公开(公告)号:DE502005002040D1

    公开(公告)日:2008-01-03

    申请号:DE502005002040

    申请日:2005-02-08

    Applicant: BASF AG

    Abstract: A continuous process for producing polyamides, their oligomers or mixtures thereof, if appropriate with further reaction products, comprises reaction of aminonitriles or dinitriles and diamines or mixtures thereof, if appropriate together with further polyamide-forming monomers and/or oligomers, with an aqueous medium composed of aqueous monomer and oligomer extracts obtained from polyamide production by extraction of the polymer with water in a reactor which has a vertical longitudinal axis and through which there is a flow substantially in the longitudinal direction wherein water and/or the aqueous medium are introduced into the reactor at two or more different locations along the vertical longitudinal axis, wherein the aqueous medium is introduced at one or more locations.

    25.
    发明专利
    未知

    公开(公告)号:BRPI0507662A

    公开(公告)日:2007-07-17

    申请号:BRPI0507662

    申请日:2005-02-08

    Applicant: BASF AG

    Abstract: A continuous process for producing polyamides, their oligomers or mixtures thereof, if appropriate with further reaction products, comprises reaction of aminonitriles or dinitriles and diamines or mixtures thereof, if appropriate together with further polyamide-forming monomers and/or oligomers, with an aqueous medium composed of aqueous monomer and oligomer extracts obtained from polyamide production by extraction of the polymer with water in a reactor which has a vertical longitudinal axis and through which there is a flow substantially in the longitudinal direction wherein water and/or the aqueous medium are introduced into the reactor at two or more different locations along the vertical longitudinal axis, wherein the aqueous medium is introduced at one or more locations.

    26.
    发明专利
    未知

    公开(公告)号:BRPI0413629A

    公开(公告)日:2006-10-17

    申请号:BRPI0413629

    申请日:2004-07-15

    Applicant: BASF AG

    Abstract: An apparatus for making polyamides oligomers thereof mixtures thereof, the apparatus comprising a material selected from the group consisting of a) an austenitic steel comprising from 15 to 25% by weight of chromium, from 3 to 35% by weight of nickel and from 0 to 10% by weight of molybdenum, and iron, b) a duplex steel comprising from 20 to 30% by weight of chromium, from 3 to 10% by weight of nickel and from 0 to 5% by weight of molybdenum, and iron, and c) a nickel-based alloy comprising from 12 to 25% by weight of chromium and from 12 to 20% by weight of molybdenum, and nickel

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