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公开(公告)号：US12084527B2
公开(公告)日：2024-09-10
申请号：US16968192
申请日：2019-02-11
Applicant: BASF SE
Inventor： Thomas Pfeiffer , Matthias Weismantel , Jürgen Schröder , Karl Possemiers , Marco Krueger , Ruediger Funk
CPC classification number: C08F2/18 , A61L15/60 , C08F2/10 , C08F6/008 , C08J3/12 , C08J3/245 , C08J2300/14 , C08J2333/02
Abstract: A process for producing superabsorbent particles, comprising drying of a polymer gel, removal of incompletely dried polymer particles, comminution of the polymer particles removed, recycling of the comminuted polymer particles and storage of the recycled polymer particles.
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公开(公告)号：US11535719B2
公开(公告)日：2022-12-27
申请号：US16649793
申请日：2018-10-09
Applicant: BASF SE
Inventor： Oskar Stephan , Gerald Gruenewald , Matthias Weismantel , Karl Possemiers , Monte Alan Peterson , Ruediger Funk , Sylvia Bertha , Tom Catternan
Abstract: A process for producing superabsorbents, comprising the steps of i) classifying the superabsorbent particles by means of one or more sieves and ii) removing metallic impurities by means of one or more magnetic separators, wherein classification is accomplished using sieves made of a wire mesh, the wires of the wire mesh consist of a steel composed of at least 70% by weight of iron, at least 10% by weight of chromium and less than 2.5% by weight of nickel, and the throughput of superabsorbent particles in the magnetic separator is in the range from 2.0 to 6.5 g/s per cm2 of free cross-sectional area.
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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：US20200316561A1
公开(公告)日：2020-10-08
申请号：US16305093
申请日：2017-05-24
Applicant: BASF SE
Inventor： Gerald Grünewald , Rüdiger Funk , Matthias Weismantel
Abstract: The invention relates to a belt drier arrangement for drying an aqueous polymer gel and for comminuting the dried polymer gel to give dried polymer particles, comprising: a drier setup for drying an aqueous polymer gel, a comminuting arrangement downstream of the drier setup relative to the product flow direction, for comminuting the dried polymer gel to give dried polymer particles. In accordance with the invention the comminuting arrangement comprises at least a first comminutor and a second comminutor, each having a rotatable shaft with functional tools, the second comminutor being disposed downstream of the first comminutor relative to the product flow direction.
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Patent Agency Ranking
56.发明申请公开(公告)号：US20190255514A1
公开(公告)日：2019-08-22
申请号：US16344046
申请日：2017-10-16
Applicant: BASF SE
Inventor： Dieter Hermeling , Rüdiger Funk , Matthias Weismantel , Monte Alan Peterson , Peter Leunis , Karl Possemiers
Abstract: Filling process for superabsorbent polymer particles The invention relates to a filling process for superabsorbent polymer particles, comprising discharging the superabsorbent polymer particles out of a silo into bulk container for shipping, wherein the filling level of the silo during filling of the bulk container is never less than 20%, in order to avoid particle segregation.
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公开(公告)号：US09822203B2
公开(公告)日：2017-11-21
申请号：US14763185
申请日：2014-01-20
Applicant: BASF SE
Inventor： Monica Haag , Roland Krauss , Thomas Gieger , Volker Klock , Matthias Weismantel
IPC: C08F2/10 , C08F222/10 , C08F6/00 , C08F8/00 , C08J3/24 , A61L15/60 , C08F220/06
CPC classification number: C08F222/1006 , A61L15/60 , C08F2/10 , C08F220/06 , C08J3/245 , C08J2333/02 , C08F2222/1026 , C08L33/08
Abstract: A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.
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公开(公告)号：US09738769B2
公开(公告)日：2017-08-22
申请号：US13763029
申请日：2013-02-08
Applicant: BASF SE
Inventor： Matthias Weismantel , Ulrich Riegel , Thomas Gieger , Markus Braun , Michael A. Mitchell
CPC classification number: C08J9/18 , C08J9/06 , C08J9/14 , C08J9/16 , C08J2300/14 , C08J2333/08 , C08J2333/14
Abstract: A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.
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公开(公告)号：US09550213B2
公开(公告)日：2017-01-24
申请号：US14779990
申请日：2014-03-18
Applicant: BASF SE
Inventor： Karl J. Possemiers , Thomas Pfeiffer , Matthias Weismantel , Rüdiger Funk , Monte Peterson , Sven Serneels , Jeffrey Johnson , Ronny De Kaey
IPC: B07B1/00 , B07B1/46 , B07B9/00 , C08J3/24 , C08L33/02 , A61L15/60 , C08F220/06 , C08J3/12 , G01N15/02
CPC classification number: B07B1/46 , A61L15/60 , B07B9/00 , B07B2201/04 , C08F220/06 , C08J3/12 , C08J3/245 , C08J2333/02 , C08L33/02 , G01N15/0272 , C08F2222/1013
Abstract: A process for classifying water-absorbing polymer particles, wherein screens having different mesh sizes are used before and after surface postcrosslinking to remove the undersize (fines).
Abstract translation: 对吸水性聚合物颗粒进行分级的方法，其中在表面后交联之前和之后使用具有不同网眼尺寸的筛网以除去小尺寸（细粒）。
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公开(公告)号：US09238215B2
公开(公告)日：2016-01-19
申请号：US14063129
申请日：2013-10-25
Applicant: BASF SE
Inventor： Matthias Weismantel , Stefan Bruhns , Dominicus van Esbroeck
Abstract: An apparatus for producing a water-absorbing polymer by polymerizing a monomer solution and drying the resulting hydrogel by means of a heated gas stream through effecting the drying in two or more temperature zones. A gas stream is flowed against the hydrogel upwardly in the upstream sector of the belt dryer and downwardly in the downstream sector of the belt dryer, the direction of flow being reversed at a water content of 15% to 45% by weight for the hydrogel. The hydrogel layer is flowed against in a belt dryer upwardly to some extent at least, the gas velocity being 5% to 30% of the gas velocity required to lift the hydrogel off the belt, to produce hygiene articles.
Abstract translation: 通过使单体溶液聚合并通过加热的气流干燥所得的水凝胶来实现两个或多个温度区域的干燥，制造吸水性聚合物的装置。 气流在带式干燥器的上游部分中向上流动，并且在带式干燥器的下游部分中向下流动水凝胶，流动方向相对于水凝胶的含水量为15重量％至45重量％。 水凝胶层在带式干燥机中向上流动至少一定程度，气体速度为将水凝胶从带上提起而产生卫生制品所需的气体速度的5％至30％。
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