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公开(公告)号：US20210402370A1
公开(公告)日：2021-12-30
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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公开(公告)号：US20200283588A1
公开(公告)日：2020-09-10
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
IPC: C08J5/02
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：US20200147652A1
公开(公告)日：2020-05-14
申请号：US16630873
申请日：2018-07-20
Applicant: BASF SE
Inventor： Rüdiger Funk , Matthias Weismantel , Monte Alan Peterson , Patrick Neal Hamilton , Ronny De Kaey , Karl Possemiers
Abstract: The invention relates to a classification process for superabsorbent polymer particles, comprising classifying the water-absorbent polymer particles in a screen machine under reduced pressure wherein the pressure above the uppermost sieve is from 0 to 4.0 mbar per sieve higher than below the undermost sieve.
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公开(公告)号：US12275808B2
公开(公告)日：2025-04-15
申请号：US17422466
申请日：2020-01-13
Applicant: BASF SE
Inventor： Rene Callot , Karl Possemiers , Ruediger Funk , Marco Krueger , Matthias Weismantel , Juergen Schroeder
IPC: C08F2/18 , A61F13/53 , B01J20/26 , B01J20/285 , C08F2/04 , C08F6/00 , C08F20/04 , F26B17/02 , F26B17/04
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 dryer, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt dryer by means of an oscillating conveyor belt and that guide devices are located at the edges of the conveyor belt.
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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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Patent Agency Ranking
公开(公告)号：US10648731B2
公开(公告)日：2020-05-12
申请号：US15571862
申请日：2016-04-15
Applicant: BASF SE
Inventor： Gerald Grünewald , Rüdiger Funk , Matthias Weismantel , Karl Possemiers
IPC: C08F2/00 , F26B3/06 , F26B17/04 , F26B21/02 , F26B21/12 , C08F2/01 , B01J20/28 , B01J20/30 , C08F2/06 , C08J3/12 , F26B25/06 , B29B9/10 , B29B9/12 , C08F20/06
Abstract: A production process for production of water-absorbing polymer particles including drying an aqueous polymer gel in a belt drier with a conveyor belt. The belt drier is formed with a drier setup substantially comprising the conveyor belt and an air recycling conduit downstream of the drier setup for air recycling, where recycled air is withdrawn from the drier setup and fed back to the drier setup via the air recycling conduit.
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公开(公告)号：US20180135912A1
公开(公告)日：2018-05-17
申请号：US15571862
申请日：2016-04-15
Applicant: BASF SE
Inventor： Gerald Grünewald , Rüdiger Funk , Matthias Weismantel , Karl Possemiers
IPC: F26B3/06 , F26B17/04 , F26B21/02 , F26B21/12 , F26B25/06 , C08F2/06 , C08J3/12 , B01J20/30 , B01J20/28
CPC classification number: F26B3/06 , B01J20/28016 , B01J20/3021 , B29B9/10 , B29B9/12 , C08F2/00 , C08F2/01 , C08F2/06 , C08F20/06 , C08J3/12 , C08J2300/14 , F26B17/04 , F26B21/02 , F26B21/12 , F26B25/06
Abstract: A production process for production of water-absorbing polymer particles including drying an aqueous polymer gel in a belt drier with a conveyor belt. The belt drier is formed with a drier setup substantially comprising the conveyor belt and an air recycling conduit downstream of the drier setup for air recycling, where recycled air is withdrawn from the drier setup and fed back to the drier setup via the air recycling conduit.
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公开(公告)号：US20250041828A1
公开(公告)日：2025-02-06
申请号：US18694478
申请日：2022-09-16
Applicant: BASF SE
Inventor： Thomas Daniel , Sebastian Marius Raupp , Monte Alan Peterson , Vernon Lynn Adey , Karl Possemiers
Abstract: A process for producing surface postcrosslinked superabsorbent particles, wherein an aqueous monomer solution with a small amount of initiator is polymerized to give a polymer gel, the resultant polymer gel is extruded through a die plate, the extruded polymer gel is dried on an air circulation belt drier having one or more zones, and the resultant polymer particles are ground and classified and then thermally surface postcrosslinked, wherein the temperatures of the drying gas supplied in the course of drying in the forward zones of the air circulation belt drier are from 120 to 160° C., and the speeds of the air supplied are from 1.2 to 3.0 m/s.
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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：US11883848B2
公开(公告)日：2024-01-30
申请号：US16630873
申请日：2018-07-20
Applicant: BASF SE
Inventor： Rüdiger Funk , Matthias Weismantel , Monte Alan Peterson , Patrick Neal Hamilton , Ronny De Kaey , Karl Possemiers
CPC classification number: B07B13/16 , B01J20/261 , B07B4/08 , B07B11/02 , C08F20/06 , B01J2220/68 , B07B2220/02
Abstract: The invention relates to a classification process for superabsorbent polymer particles, comprising classifying the water-absorbent polymer particles in a screen machine under reduced pressure wherein the pressure above the uppermost sieve is from 0 to 4.0 mbar per sieve higher than below the undermost sieve.
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