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    Process for preparing an aromatic polyamine mixture
    1.
    发明授权
    Process for preparing an aromatic polyamine mixture 有权

    公开(公告)号：US11028042B2

    公开(公告)日：2021-06-08

    申请号：US16071309

    申请日：2017-01-12

    Applicant: BASF SE

    Inventor： Viktor Ladnak ,  Silvia Tauro ,  Kerstin Heinen ,  Kai Thiele ,  Klaus-Peter Metzner ,  Torsten Mattke

    IPC: C07C209/78 ,  C07C209/88 ,  B01D3/14

    Abstract: A process for preparing an aromatic polyamine mixture including 4,4′-methylenedi(phenylamine) and higher homologues of MDA is provided. The process includes steps of (i) reaction of aniline with formaldehyde by means of an acid catalyst to form a crude product mixture (I), (ii) neutralization of the crude product mixture (I) and removal of the salts formed; (iii) isolation of aniline; (iv) distillation of the resulting crude product mixture so as to separate off (iv-1) a mixture (II) of MDA isomers (II-1) containing from 8 to 20% by weight of 4,4′-methylenedi(phenylamine) and not more than 0.3% by weight of secondary components (II-2) and (iv-2) a low boiler mixture of at least 55% by weight of secondary components (II-2) and MDA isomers (II-1); and (v) recirculation of the mixture (II).

    Separation of a phosgene- and hydrogen chloride-comprising stream
    3.
    发明授权
    Separation of a phosgene- and hydrogen chloride-comprising stream 有权

    公开(公告)号：US10252912B2

    公开(公告)日：2019-04-09

    申请号：US15557187

    申请日：2016-03-10

    Applicant: BASF SE

    Inventor： Heiner Schelling ,  Torsten Mattke ,  Hans-Juergen Pallasch ,  Kai Thiele

    IPC: C01B7/07 ,  C01B32/80 ,  B01D53/00 ,  C07C263/10 ,  C07C263/20 ,  F25J3/00

    Abstract: The invention relates to a method of separating a phosgene- and hydrogen chloride-comprising stream (5), wherein said method comprises conveying the hydrogen chloride- and phosgene-comprising stream (5) into a distillation column (1), withdrawing at the bottom of the distillation column (1) a phosgene-comprising stream (7) and withdrawing at the top of the column an essentially hydrogen chloride-comprising stream (9). At least a portion of the stream (9) withdrawn at the top is compressed and at least partially condensed and at least a portion of the liquid and compressed essentially hydrogen chloride-comprising stream is decompressed and recycled into the top of distillation column (1) as reflux.

    Method of regulating the viscosity of a mixture comprising at least two components having different viscosities
    5.
    发明授权
    Method of regulating the viscosity of a mixture comprising at least two components having different viscosities 有权
    调节包含至少两种具有不同粘度的组分的混合物的粘度的方法

    公开(公告)号：US09170184B2

    公开(公告)日：2015-10-27

    申请号：US13792432

    申请日：2013-03-11

    Applicant: BASF SE

    Inventor： Kai Thiele ,  Bart Janssen ,  Wouter Ducheyne

    IPC: G05D11/12 ,  G01N11/00 ,  G05D24/02 ,  C10G73/34

    CPC classification number: G01N11/00 ,  C10G73/34 ,  G01N2011/0073 ,  G05D24/02

    Abstract: A method of regulating the viscosity of a mixture containing at least two components having different viscosities, which includes the steps of: (a) determination of the viscosity of the mixture via ultrasound measurements, (b) standardization of the viscosity determined to standard conditions, (c) comparison of the standardized viscosity with a prescribed intended value, and (d) adjustment of the viscosity of the mixture by increasing or decreasing the proportion of at least one component of the mixture, where the ultrasound measurements in step (a) are carried out at or in a line conveying the mixture or in a vessel.

    Abstract translation: 一种调节含有至少两种具有不同粘度的组分的混合物的粘度的方法，其包括以下步骤：（a）通过超声测量测定混合物的粘度，（b）根据标准条件测定的粘度的标准化， （c）将标准粘度与规定的预期值进行比较，和（d）通过增加或减少混合物中至少一种组分的比例来调节混合物的粘度，其中步骤（a）中的超声测量为 在输送混合物或在容器中的一行或之中进行。

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