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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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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：US20220089789A1
公开(公告)日：2022-03-24
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 , C08F2/04 , C08F20/04 , C08F6/00 , B01J20/26 , F26B17/04 , F26B17/02 , B01J20/285 , A61F13/53
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：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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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：US10683371B2
公开(公告)日：2020-06-16
申请号：US15773591
申请日：2016-11-15
Applicant: BASF SE
Inventor： Marco Krueger , Karl Possemiers , Gerald Gruenewald , Juergen Freiberg , Markus Muehl
IPC: C08F2/01 , B01J4/00 , C08F2/34 , B01J19/24 , B01J2/16 , B01J8/24 , C08F2/12 , C08F2/14 , C08F20/14
Abstract: The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor, a fluidized bed and an apparatus for product discharge from the fluidized bed. The apparatus for product discharge comprises a discharge apparatus, with a backup segment (39) disposed above the discharge apparatus.
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公开(公告)号：US09809686B2
公开(公告)日：2017-11-07
申请号：US14904614
申请日：2014-07-16
Applicant: BASF SE
Inventor： Joerg Erbes , Stefan Muessig , Tobias Kortekamp , Marco Krueger , Markus Steffen , Angela Ulzhoefer , Cecile Schneider , Alexandra Wiedemann , Simon Gramlich
CPC classification number: C08J3/14 , B29C47/0011 , B29K2081/06 , C08G65/46 , C08G75/23 , C08J3/12 , C08J2381/06 , C08J2381/08
Abstract: The invention relates to a process for producing polyarylene ether beads from a polyarylene ether solution, comprising the steps of i) dividing the polyarylene ether solution in a division apparatus which is made to vibrate with a frequency of 10 to 1400 Hz to obtain droplets, ii) transferring the droplets into a precipitation bath to form polyarylene ether beads in the precipitation bath which (A) comprises at least one aprotic solvent (component (1)) and at least one protic solvent (component (2)), (B) has a temperature of 0° C. to Tc, where the critical temperature Tc in [° C.] can be determined by the numerical equation Tc=(77−c)/0.58 in which c is the concentration of component (1) in the precipitation bath in [% by weight] and (C) has component (1) in concentrations of 5% by weight to cc, where the critical concentration cc in [% by weight] can be determined by the numerical equation cc=77−0.58*T in which T is the temperature in the precipitation bath in [° C.], where the percentages by weight are each based on the sum of the percentages by weight of component (1) and of component (2) in the precipitation bath.
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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：US20230149871A1
公开(公告)日：2023-05-18
申请号：US17920785
申请日：2021-04-22
Applicant: BASF SE
Inventor： Sebastian Marius Raupp , Sylvia Bertha , Andreas Daiss , Marco Krueger
Abstract: The invention relates to an apparatus for producing a pulverulent product, comprising a device for dropletization (5) of a liquid phase, an addition point (15) for a gas above the device for dropletization (5), at least one gas withdrawal point (19) on the circumference of the apparatus (1), a solid withdrawal point (12) and a tower shell (13) between the device for dropletization (5) and the gas withdrawal point (19) and having, above the solid withdrawal point (12), a region (11) having at least partly a decreasing hydraulic diameter toward the solid withdrawal point (12) and having a maximum hydraulic diameter greater than the mean hydraulic diameter of the tower shell (13), and the tower shell (13) projecting into the region (11) having at least partly a decreasing hydraulic diameter such that an annular duct (23) is formed between the part of the tower shell (13) projecting into the region (11) having at least partly a decreasing hydraulic diameter and the upper part (27) of the region having at least partly a decreasing hydraulic diameter, the at least one gas withdrawal point (19) being disposed in the annular duct (23), wherein the part of the tower shell (13) projecting into the region (11) having at least partly a decreasing hydraulic diameter and forming an inner wall of the annular duct (23) is made at least partly of a gas permeable material (29). The invention further relates to a use of the apparatus (1) for producing pulverulent poly(meth)acrylate.
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