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公开(公告)号:US10150091B2
公开(公告)日:2018-12-11
申请号:US15320776
申请日:2015-06-16
Applicant: BASF SE
Inventor: Andreas Daiss , Robert Bayer , Rudolf Schliwa , Jürgen Freiberg , Karl J. Possemiers , Marco Krüger
IPC: B01J4/00 , C08F120/14
Abstract: An apparatus for addition of droplets of a monomer solution for production of poly(meth)acrylate to a reactor for droplet polymerization, comprising at least one channel or a dropletizer head having, at its base, holes through which the solution is dropletized into the reactor, at least one of the following features being fulfilled: (a) the ratio of the area covered by the channels or the dropletizer head in the reactor relative to the area which is defined by the circumference of a line along the outermost holes is less than 50%, (b) the number of holes relative to the area which is defined by the circumference of a line along the outermost holes is within a range from 100 to 1000 holes/m2.
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公开(公告)号:US09925511B2
公开(公告)日:2018-03-27
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
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.
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13.
公开(公告)号:US09914112B2
公开(公告)日:2018-03-13
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 , C08F2/01 , C08F6/00 , C08F2/34 , B01J20/28 , B01J20/30 , C08L33/08 , C08L33/02 , C08L101/14
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).
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公开(公告)号:US20180065102A1
公开(公告)日:2018-03-08
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 , B01J4/00 , B01J8/08 , C08F120/06 , C08F2/01
CPC classification number: B01J8/125 , B01J4/001 , B01J4/005 , B01J8/087 , B01J8/12 , B01J2208/00203 , B01J2208/00389 , B01J2208/00415 , B01J2219/00083 , B01J2219/00132 , B01J2219/00135 , B01J2219/00254 , B01J2219/185 , B01J2219/1943 , B01J2219/1946 , C08F2/01 , 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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15.
公开(公告)号:US20170320983A1
公开(公告)日:2017-11-09
申请号:US15661543
申请日:2017-07-27
Applicant: BASF SE
Inventor: Thomas Daniel , Norbert Herfert , Stephan Bauer , Katrin Baumann , Birgit Reinhard , Jürgen Freiberg , Rudolf Schliwa
IPC: C08F220/06 , C08F6/00 , B01J20/28 , B01J20/26 , A61L15/22 , A61L15/60 , A61L15/42 , A61L15/24 , C08L33/02
CPC classification number: C08F220/06 , A61L15/22 , A61L15/24 , A61L15/42 , A61L15/60 , B01J20/267 , B01J20/28023 , B01J20/2805 , C08F6/005 , C08L33/02 , C08L33/08 , C08F2222/1013
Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.
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