Method for inhibiting unwanted radical polymerisation of acrylic acid present in a liquid phase P

    公开(公告)号:US11447439B2

    公开(公告)日:2022-09-20

    申请号:US17263415

    申请日:2019-07-16

    Applicant: BASF SE

    Abstract: Process for inhibiting the undesired free-radical polymerization of acrylic acid present in a liquid phase P, wherein the acrylic acid content of P is at least 10% by weight, the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal based on the weight of the acrylic acid present in P and the liquid phase P is admixed with furfural in an amount that results in a furfural content in the range from 25 to 1000 ppmw based on the weight of the acrylic acid present in P. Liquid phase P, wherein the acrylic acid content of P is at least 10% by weight and the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal and in the range from 25 to 1000 ppmw of furfural in each case based on the weight of the acrylic acid present in P.

    Apparatus and process for separating a target product from a liquid phase comprising the target product

    公开(公告)号:US10173147B2

    公开(公告)日:2019-01-08

    申请号:US14738033

    申请日:2015-06-12

    Applicant: BASF SE

    Abstract: The present invention relates to an apparatus (1) for separation of a target product from a liquid phase P comprising the target product, comprising at least one primary space (3) for a heat transfer medium W, at least one first feed unit (5a) and one first removal unit (5b) for the heat transfer medium W, at least one secondary space (7) for the liquid phase P, at least one second feed unit (9) for the liquid phase P, at least one crystallization surface (13) which divides the primary space (3) and the secondary space (7), at least one second removal unit (15) for the target product and at least one application unit (11) for a liquid phase P0 essentially directly to the crystallization surface (13) or the surfaces of lines that conduct the heat transfer medium W. The present invention further relates to a process for removing a target product from a liquid phase P comprising the target product.

    Thermal separation process
    17.
    发明授权
    Thermal separation process 有权
    热分离过程

    公开(公告)号:US09018416B2

    公开(公告)日:2015-04-28

    申请号:US13828505

    申请日:2013-03-14

    Applicant: BASF SE

    Abstract: A thermal separation process between a gas ascending in a separating column and a liquid descending in the separating column, which comprise (meth)acrylic monomers, wherein the separating column comprises a sequence of crossflow mass transfer trays, the crossflow mass transfer trays of which have passage orifices for the ascending gas in crossflow direction both in front of and beyond a downcomer for the descending liquid, and such crossflow mass transfer trays and one such crossflow mass transfer tray in a sequence of crossflow mass transfer trays present in a separating column.

    Abstract translation: 在分离塔中上升的气体和分离塔中下降的液体之间的热分离过程,其包含(甲基)丙烯酸单体,其中分离塔包括一系列交叉流传质托盘,其交叉流传质托盘具有 用于下降液体的降液管之前和之后的横流方向的上升气体的通道孔,以及存在于分离塔中的交叉流传质托盘中的这种交叉流传质托盘和一个这样的交叉流传质托盘。

    THERMAL SEPARATION PROCESS
    20.
    发明申请
    THERMAL SEPARATION PROCESS 审中-公开
    热分离方法

    公开(公告)号:US20150158011A1

    公开(公告)日:2015-06-11

    申请号:US14562481

    申请日:2014-12-05

    Applicant: BASF SE

    Abstract: A thermal separation process between a gas ascending in a separating column and a liquid descending in the separating column, which comprise (meth)acrylic monomers, wherein the separating column comprises a sequence of crossflow mass transfer trays, the crossflow mass transfer trays of which have passage orifices for the ascending gas in crossflow direction both in front of and beyond a downcomer for the descending liquid, and such crossflow mass transfer trays and one such crossflow mass transfer tray in a sequence of crossflow mass transfer trays present in a separating column.

    Abstract translation: 在分离塔中上升的气体和分离塔中下降的液体之间的热分离过程,其包含(甲基)丙烯酸单体,其中分离塔包括一系列交叉流传质托盘,其交叉流传质托盘具有 用于下降液体的降液管之前和之后的横流方向的上升气体的通道孔,以及存在于分离塔中的交叉流传质托盘中的这种交叉流传质托盘和一个这样的交叉流传质托盘。

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