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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：US12220686B2
公开(公告)日：2025-02-11
申请号：US17289287
申请日：2019-11-04
Applicant: BASF SE
Inventor： Monte Alan Peterson , Ronny De Kaey , Karl Possemiers , Juergen Schroeder , Ruediger Funk , Matthias Weismantel
Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises partly neutralized acrylic acid formed by continuous mixing of acrylic acid and an aqueous solution of a base, the apparatus for preparing the partly neutralized acrylic acid comprises a vessel (B), and the feed line to vessel (B) ends inside vessel (B) below the liquid Level of the partly neutralized acrylic acid.
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Patent Agency Ranking
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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公开(公告)号：US20220185924A1
公开(公告)日：2022-06-16
申请号：US17432135
申请日：2020-02-21
Applicant: BASF SE
Inventor： Monte Alan Peterson , Ruediger Funk , Matthias Weismantel , Juergen Schroeder
IPC: C08F220/06 , A61L15/60 , B02C4/02 , B02C4/28 , B02C4/40 , C08F2/06 , B01J20/28 , B01J20/26 , B01J20/30
Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, drying the resulting polymer gel and grinding the dried polymer gel with a roll mill, wherein the rolls of the roll mill are cleaned by reducing the feed rate to the roll mill, and if the deflection and/or the power consumption increases above a setpoint, operating the roll mill with reduced feed, and increasing the feed rate to the roll mill.
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公开(公告)号：US20210402373A1
公开(公告)日：2021-12-30
申请号：US17289302
申请日：2019-11-04
Applicant: BASF SE
Inventor： Monte Alan Peterson , Ronny De Kaey , Karl Possemiers , Juergen Schroeder , Ruediger Funk , Matthias Weismantel
Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises partly neutralized acrylic acid formed by continuous mixing of acrylic acid and an aqueous solution of a base, the apparatus for preparing the partly neutralized acrylic acid comprises a vessel (B), and the vessel (B) has a cylindrical shape and a torispherical bottom.
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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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