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公开(公告)号：US20210338882A1
公开(公告)日：2021-11-04
申请号：US17272364
申请日：2019-09-17
Applicant: BASF SE
Inventor： Rene Callot , Ruediger Funk , Marco Krueger , Thomas Pfeiffer , Karl Possemiers , Juergen Schroeder , Matthias Weismantel
Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising drying of the resultant aqueous polymer gel in an air circulation belt drier, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt drier by means of an oscillating conveyor belt, the underside of the revolving conveyor belt is freed of adhering polymer gel by means of at least one stripper device, and the underside of the revolving conveyor belt is sprayed with water.
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公开(公告)号：US20210154637A1
公开(公告)日：2021-05-27
申请号：US17264093
申请日：2019-08-09
Applicant: BASF SE
Inventor： Thomas Pfeiffer , Ruediger Funk , Marco Krueger , Karl Possemiers , Juergen Schroeder , Matthias Weismantel
Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution, comprising the steps of continuously polymerizing the monomer solution on the continuous belt of a belt reactor, comminuting the polymer gel obtained, rinsing the polymer gel obtained on the underside of the belt reactor into a separation unit with water, separating the polymer gel from the water in the separation unit and recycling the polymer gel into the comminution, wherein the polymer gel has a swelling capacity in water of at least 100 g/g, the dwell time of the polymer gel in the rinse water is less than 40 minutes, and the separation unit has openings with a clear width of at least 1 mm.
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公开(公告)号：US10335756B2
公开(公告)日：2019-07-02
申请号：US15564219
申请日：2016-03-23
Applicant: BASF SE
Inventor： Robert Bayer , Juergen Freiberg , Oliver Gampfer , Marco Krueger
Abstract: The invention relates to an apparatus for introduction of droplets into a reactor, comprising a holder for at least one dropletizer unit, where the dropletizer unit has a feed for a liquid to be dropletized and a dropletizer plate and the dropletizer plate has holes through which a liquid to be dropletized is introduced into the reactor, where the holder for the at least one dropletizer unit can be pushed into the reactor or pulled out of the reactor through an opening in the shell of the reactor. At least one rail is accommodated within the reactor and is used to guide the holder for the at least one dropletizer unit along it.
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公开(公告)号：US20180126351A1
公开(公告)日：2018-05-10
申请号：US15564219
申请日：2016-03-23
Applicant: BASF SE
Inventor： Robert Bayer , Juergen Freiberg , Oliver Gampfer , Marco Krueger
CPC classification number: B01J4/002 , B01J4/007 , B01J19/26 , B01J2219/185 , B01J2219/1943 , C08F2/01
Abstract: The invention relates to an apparatus for introduction of droplets into a reactor, comprising a holder for at least one dropletizer unit, where the dropletizer unit has a feed for a liquid to be dropletized and a dropletizer plate and the dropletizer plate has holes through which a liquid to be dropletized is introduced into the reactor, where the holder for the at least one dropletizer unit can be pushed into the reactor or pulled out of the reactor through an opening in the shell of the reactor. At least one rail is accommodated within the reactor and is used to guide the holder for the at least one dropletizer unit along it.
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