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公开(公告)号：US20180044486A1
公开(公告)日：2018-02-15
申请号：US15552858
申请日：2016-01-26
Applicant: BASF SE
Inventor： Stephan Bauer , Yvonne Hagen , Katrin Baumann , Christophe Bauduin , Thomas Daniel , Thomas Pfeiffer
CPC classification number: C08J3/245 , A61L15/24 , A61L15/60 , B01J20/267 , B01J20/28004 , C08F2/10 , C08F220/06 , C08J2333/02 , C09D133/02
Abstract: The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution, wherein water-absorbent polymer particles having an average particle diameter from 150 to 400 μηη, an amount of water-absorbent polymer particles having a particle size of less than 100 μηη of less than 5% by weight and an amount of water-absorbent polymer particles having a particle size of more than 500 μηη of less than 5% by weight are coated with at least one surface-postcrosslinker and thermal surface-postcrosslinked.
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公开(公告)号：US12239947B2
公开(公告)日：2025-03-04
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：US09144782B2
公开(公告)日：2015-09-29
申请号：US14308862
申请日：2014-06-19
Applicant: BASF SE
Inventor： Rüdiger Funk , Thomas Pfeiffer , Jürgen Schröder
IPC: B01J19/00 , C08F20/06 , B01J19/28 , C08F220/28
CPC classification number: B01J19/28 , C08F220/28
Abstract: A process for continuously producing water-absorbing polymer particles by polymerizing a monomer solution comprising acrylic acid and/or salts thereof, wherein the acrylic acid supplied has a dimeric acrylic acid content of at least 0.02% by weight and the dimeric acrylic acid content is kept essentially constant.
Abstract translation: 通过聚合包含丙烯酸和/或其盐的单体溶液连续生产吸水性聚合物颗粒的方法，其中所提供的丙烯酸的二聚丙烯酸含量为至少0.02重量％，并保持二聚丙烯酸含量 基本不变。
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公开(公告)号：US12059504B2
公开(公告)日：2024-08-13
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
CPC classification number: A61L15/60 , B01J20/261 , B08B1/165 , B08B1/20 , C08F220/06 , C08J3/245 , B01J2220/68 , C08F6/008
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：US11680142B2
公开(公告)日：2023-06-20
申请号：US16628689
申请日：2018-07-06
Applicant: BASF SE
Inventor： Ruediger Funk , Thomas Pfeiffer , Matthias Weismantel , Monte Alan Peterson , Karl Possemiers , Ronny De Kaey
CPC classification number: C08J3/12 , B07B1/46 , C08J3/075 , C08J3/245 , C08J2300/12 , C08J2300/14 , C08J2333/08
Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising surface postcrosslinking, classifying the surface postcrosslinked superabsorbent polymer particles, deagglomerating the separated oversize fraction using a roll crusher and recycling the disintegrated oversize fraction before or into the classification of the surface postcrosslinked superabsorbent polymer particles.
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Patent Agency Ranking
公开(公告)号：US20210291145A1
公开(公告)日：2021-09-23
申请号：US17258931
申请日：2019-07-15
Applicant: BASF SE
Inventor： Marco Krueger , Ruediger Funk , Thomas Pfeiffer , Karl Possemiers , Juergen Schroeder , Matthias Weismantel
Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising the steps of continuously preneutralizing a monomer while cooling and partly recycling the preneutralized monomer into the preneutralization, continuously heating the preneutralized monomer by means of a heat exchanger and continuously postneutralizing the heated monomer, wherein the monomer solution or suspension prior to entry into the polymerization reactor is at a temperature of 70 to 99° C. and the temperature of the heating medium used in the heat exchanger is less than 160° C.
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公开(公告)号：US20160030979A1
公开(公告)日：2016-02-04
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
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：US20140328723A1
公开(公告)日：2014-11-06
申请号：US14308862
申请日：2014-06-19
Applicant: BASF SE
Inventor： Rüdiger Funk , Thomas Pfeiffer , Jürgen Schröder
IPC: B01J19/28
CPC classification number: B01J19/28 , C08F220/28
Abstract: A process for continuously producing water-absorbing polymer particles by polymerizing a monomer solution comprising acrylic acid and/or salts thereof, wherein the acrylic acid supplied has a dimeric acrylic acid content of at least 0.02% by weight and the dimeric acrylic acid content is kept essentially constant.
Abstract translation: 通过聚合包含丙烯酸和/或其盐的单体溶液连续生产吸水性聚合物颗粒的方法，其中所提供的丙烯酸的二聚丙烯酸含量为至少0.02重量％，并保持二聚丙烯酸含量 基本不变。
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公开(公告)号：US12121877B2
公开(公告)日：2024-10-22
申请号：US17258931
申请日：2019-07-15
Applicant: BASF SE
Inventor： Marco Krueger , Ruediger Funk , Thomas Pfeiffer , Karl Possemiers , Juergen Schroeder , Matthias Weismantel
CPC classification number: B01J20/267 , A61L15/26 , A61L15/60 , B01J20/28016 , B01J20/3085 , C08F20/06 , C08J3/245 , C08F2810/20
Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising the steps of continuously preneutralizing a monomer while cooling and partly recycling the preneutralized monomer into the preneutralization, continuously heating the preneutralized monomer by means of a heat exchanger and continuously postneutralizing the heated monomer, wherein the monomer solution or suspension prior to entry into the polymerization reactor is at a temperature of 70 to 99° C. and the temperature of the heating medium used in the heat exchanger is less than 160° C.
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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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