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    PROCESS FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES BY POLYMERIZING DROPLETS OF A MONOMER SOLUTION
    1.
    发明申请
    PROCESS FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES BY POLYMERIZING DROPLETS OF A MONOMER SOLUTION 有权
    通过聚合单体溶液的水溶液生产吸水聚合物颗粒的方法

    公开(公告)号：US20160332140A1

    公开(公告)日：2016-11-17

    申请号：US15112445

    申请日：2015-01-14

    Applicant: BASF SE

    Inventor： Stephan Bauer ,  Norbert Herfert ,  Jürgen Freiberg ,  Rudolf Schliwa ,  Karl J. Possemiers ,  Robert Bayer

    IPC: B01J20/26 ,  B01J20/28 ,  C08L33/08 ,  B01J20/30

    CPC classification number: B01J20/267 ,  B01J20/28016 ,  B01J20/3085 ,  C08F2/01 ,  C08F2/34 ,  C08F6/001 ,  C08F6/008 ,  C08L33/02 ,  C08L33/08 ,  C08L101/14 ,  C08F220/06 ,  C08F2222/1026

    Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase in a reactor comprising a gas distributor (3), a reaction zone (5) and a fluidized bed (27), the gas leaving the reactor is treated in a condenser column (12) with an aqueous solution, the treated gas leaving the condenser column (12) is recycled at least partly to the fluidized bed (27), wherein the gas leaving the condenser column (12) comprises from 0.05 to 0.3 kg steam per kg dry gas and the steam content of the gas entering the gas distributor (3) is less than 80% of the steam content of the gas leaving the condenser column (12).

    Abstract translation: 本发明涉及通过在包括气体分配器（3），反应区（5）和流化床（27）的反应器中聚合在周围加热气相中的单体溶液的液滴来生产吸水性聚合物颗粒的方法 ），离开反应器的气体在具有水溶液的冷凝器塔（12）中处理，离开冷凝器塔（12）的处理气体至少部分地再循环到流化床（27），其中离开冷凝器的气体 塔（12）包含0.05至0.3kg蒸汽/ kg干燥气体，并且进入气体分配器（3）的气体的蒸汽含量小于离开冷凝塔（12）的气体蒸汽含量的80％。

    DEVICE FOR PRODUCING POLY(METH)ACRYLATE IN POWDER FORM
    2.
    发明申请
    DEVICE FOR PRODUCING POLY(METH)ACRYLATE IN POWDER FORM 审中-公开

    公开(公告)号：US20180326392A1

    公开(公告)日：2018-11-15

    申请号：US15774620

    申请日：2016-11-16

    Applicant: BASF SE

    Inventor： Marco Krüger ,  Karl Possemiers ,  Rudolf Schliwa ,  Robert Bayer

    IPC: B01J19/24 ,  B01J19/06 ,  B01J8/18 ,  B01J8/22 ,  B01J8/00 ,  C08F120/14

    CPC classification number: B01J19/245 ,  B01J4/002 ,  B01J8/0055 ,  B01J8/1818 ,  B01J8/22 ,  B01J19/06 ,  B01J19/24 ,  B01J2208/00761 ,  B01J2219/185 ,  C08F120/14

    Abstract: The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor and a fluidized bed, the reactor comprising a reactor shell between the apparatus for dropletization and the gas withdrawal point and having, above the fluidized bed, a region having decreasing hydraulic diameter toward the fluidized bed and having a maximum hydraulic diameter greater than the mean hydraulic diameter of the reactor shell, and the reactor shell projecting into the region having decreasing hydraulic diameter, so as to form an annular duct between the outer wall of the reactor shell and the wall by which the region having decreasing hydraulic diameter is bounded, and the at least one gas withdrawal point being disposed in the annular duct, wherein the ratio of the horizontal area of the annular duct to the horizontal area enclosed by the reactor shell is in the range from 0.3 to 5.

    APPARATUS FOR INTRODUCTION OF DROPLETS OF A MONOMER SOLUTION INTO A REACTOR
    8.
    发明申请
    APPARATUS FOR INTRODUCTION OF DROPLETS OF A MONOMER SOLUTION INTO A REACTOR 有权

    公开(公告)号：US20170232418A1

    公开(公告)日：2017-08-17

    申请号：US15320771

    申请日：2015-06-23

    Applicant: BASF SE

    Inventor： Andreas Daiss ,  Robert Bayer ,  Rudolf Schliwa ,  Jürgen Freiberg ,  Karl J. Possemiers ,  Marco Krüger

    IPC: B01J19/06 ,  C08F20/18 ,  B01J19/24

    CPC classification number: B01J19/06 ,  B01J4/004 ,  B01J8/1818 ,  B01J19/24 ,  B01J2208/00371 ,  B01J2208/0092 ,  B01J2208/00938 ,  B01J2219/24 ,  C08F20/18

    Abstract: An apparatus for introducing droplets of a monomer solution for production of poly(meth)acrylate into a reactor for droplet polymerization, comprising at least one channel or a dropletizer head, the channel or the dropletizer head being sealed at its base by a dropletizer plate, the dropletizer plate having holes through which the monomer solution is introduced into the reactor, and the dropletizer plate being configured such that holes that, in an axially symmetric dropletizer plate or in an annular dropletizer plate or in one configured as a ring segment, are not on a center line of the dropletizer plate or, in the case of a circular dropletizer plate, are not at the center of the dropletizer plate are aligned such that monomer solution is introduced through the holes into the reactor at an angle to the vertical, and the holes in the case of a radial alignment of axially symmetric dropletizer plates being aligned such that the angle at which the monomer solution is introduced into the reactor decreases in the direction of the axis of the reactor and, in the case of dropletizer plates arranged parallel to one another or of concentrically arranged dropletizer plates, each being aligned on a line parallel to the center line or line running concentrically about the center, such that the angle at which the monomer solution is introduced into the reactor is constant.

    Apparatus for producing pulverulent poly(meth)acrylate
    10.
    发明授权
    Apparatus for producing pulverulent poly(meth)acrylate 有权

    公开(公告)号：US10252238B2

    公开(公告)日：2019-04-09

    申请号：US15554436

    申请日：2016-02-25

    Applicant: BASF SE

    Inventor： Robert Bayer ,  Jürgen Freiberg ,  Rudolf Schliwa ,  Marco Krüger

    IPC: B01J8/12 ,  C08F2/01 ,  B01J8/08 ,  B01J4/00 ,  C08F120/06

    Abstract: An apparatus for producing pulverulent poly(meth)acrylate in a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the production of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor and a fluidized bed, and above the gas withdrawal point the reactor has a region having a constant hydraulic internal diameter and below the gas withdrawal point the reactor has a hydraulic internal diameter that steadily decreases. The reactor has a heating means in the region having a steadily decreasing hydraulic internal diameter.

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