HERSTELLUNG WASSERABSORBIERENDER HARZE
    13.
    发明授权
    HERSTELLUNG WASSERABSORBIERENDER HARZE 有权
    生产用水,吸附树脂

    公开(公告)号:EP2178926B1

    公开(公告)日:2011-10-19

    申请号:EP08787056.4

    申请日:2008-08-08

    Applicant: BASF SE

    CPC classification number: C08F220/06

    Abstract: The invention relates to a method for producing water-absorbent resins, wherein a) acrylic acid is produced at an acrylic acid production site, b) the produced acrylic acid is dissolved in water at the acrylic acid production site, thus an aqueous acrylic acid solution is obtained, c) the acrylic acid solution is fed into a pipeline at the acrylic acid production site and is transported through the pipeline to an acrylic acid processing site d) the aqueous acrylic acid solution undergoes a radical polymerization at the acrylic acid processing site. Said method guarantees a save transport of the highly reactive acrylic acid. A threat caused by early polymerization, as with pure acrylic acid, is not possible, as the acrylic acid is 'diluted' due to the aqueous solvent and the specific thermal capacity or the evaporation enthalpy of the water limit the maximum temperature increase. The amount of polymerization inhibitors can be reduced or no polymerization inhibitors have to be used at all. Temperature control of containers, pipe conduits and pipelines, carrying the aqueous acrylic acid solution is not necessary, as the solidification point of the aqueous acrylic acid solution is lower than the one of the anhydrous acrylic acid.

    KOLONNE ZUR THERMISCHEN BEHANDLUNG EINES FLUIDS MIT EINER RÜCKFLUSSLEITUNG
    19.
    发明公开
    KOLONNE ZUR THERMISCHEN BEHANDLUNG EINES FLUIDS MIT EINER RÜCKFLUSSLEITUNG 审中-公开
    KOLONNE ZUR THERMISCHEN BEHANDLUNG EINES FLUIDS MIT EINERRÜCKFLUSSLEITUNG

    公开(公告)号:EP3177379A1

    公开(公告)日:2017-06-14

    申请号:EP15747794.4

    申请日:2015-08-04

    Applicant: BASF SE

    Abstract: The invention relates to a column (1) for the thermal treatment of a fluid, comprising: a cylindrical, vertically oriented column body (2) forming a column hollow chamber (3); and a material exchange base (4) arranged in the column hollow chamber (3), forming a collecting surface (5). The column (1) according to the invention is characterised by a circulation device (9) comprising: at least one outlet opening (10) formed in the column body (2) above the collecting surface (5); a circulation line (11) in fluid connection with the outlet opening (10); and at least one recirculation opening (14; 14-1 to 14-3) which is in fluid connection with the circulation line (11), and which is formed in the column body (2) above the collection surface (5). The invention also relates to a thermal separation method, wherein a column (1) of this type is used. With this separation method, a gas rises in the column and a liquid falls in the column, wherein the gas and/or the liquid contains in particular (meth)acrylmonomers.

    Abstract translation: 本发明涉及一种用于流体热处理的塔(1),该塔具有形成柱空腔(3)的圆柱形垂直柱体(2)和设置在该柱中的传质塔盘(4) 空腔(3)并形成收集区域(5)。 本发明的塔(1)的特征在于循环装置(9),其具有在收集区域(5)上方的柱体(2)中形成的至少一个排放孔口(10),循环管线(11) 排放孔(10)和至少一个循环孔(14; 14-1至14-3),所述循环孔与循环管线(11)流体连通并形成在塔体(2)中的收集区域上方 5)。 本发明还涉及一种使用这种塔(1)的热分离方法。 在该分离过程中,气体在塔内上升并且液体在塔内下降,所述气体和/或液体尤其包含(甲基)丙烯酸单体。

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