Patents by Inventor Marco Krüger
Marco Krüger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11332550Abstract: An apparatus for production of pulverulent polymers having a reactor for droplet polymerization with an apparatus for dropletization of a monomer solution for the preparation of the polymer. The apparatus for dropletization has 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 at the periphery of the reactor and a fluidized bed, wherein at least one of the following is fulfilled: an apparatus for increasing turbulence in the gas flow is disposed in the region of the apparatus for dropletization of the monomer solution, an apparatus for increasing turbulence in the gas flow is disposed in the region of the addition point for the gas, the addition point for gas is configured such that elevated turbulence is generated. A process for producing pulverulent polymers, in which an increase in flow turbulence in the gas flow in the region of the apparatus for dropletization also is disclosed.Type: GrantFiled: February 26, 2018Date of Patent: May 17, 2022Assignee: BASF SEInventors: Stephan Bauer, Markus Toennessen, Christophe Bauduin, Katrin Baumann, Marco Krüger, Andreas Daiss, Markus Muehl
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Publication number: 20220089789Abstract: 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.Type: ApplicationFiled: January 13, 2020Publication date: March 24, 2022Inventors: Rene Callot, Karl Possemiers, Ruediger Funk, Marco Krueger, Matthias Weismantel, Juergen Schroeder
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Publication number: 20210338882Abstract: 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.Type: ApplicationFiled: September 17, 2019Publication date: November 4, 2021Inventors: Rene Callot, Ruediger Funk, Marco Krueger, Thomas Pfeiffer, Karl Possemiers, Juergen Schroeder, Matthias Weismantel
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Publication number: 20210291145Abstract: 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.Type: ApplicationFiled: July 15, 2019Publication date: September 23, 2021Inventors: Marco Krueger, Ruediger Funk, Thomas Pfeiffer, Karl Possemiers, Juergen Schroeder, Matthias Weismantel
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Publication number: 20210154637Abstract: 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.Type: ApplicationFiled: August 9, 2019Publication date: May 27, 2021Inventors: Thomas Pfeiffer, Ruediger Funk, Marco Krueger, Karl Possemiers, Juergen Schroeder, Matthias Weismantel
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Publication number: 20200392258Abstract: 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.Type: ApplicationFiled: February 11, 2019Publication date: December 17, 2020Inventors: Thomas Pfeiffer, Matthias Weismantel, Jürgen Schröder, Karl Possemiers, Marco Krueger, Ruediger Funk
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Publication number: 20200231711Abstract: An apparatus for production of pulverulent polymers having a reactor for droplet polymerization with an apparatus for dropletization of a monomer solution for the preparation of the polymer. The apparatus for dropletization has 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 at the periphery of the reactor and a fluidized bed, wherein at least one of the following is fulfilled: an apparatus for increasing turbulence in the gas flow is disposed in the region of the apparatus for dropletization of the monomer solution, an apparatus for increasing turbulence in the gas flow is disposed in the region of the addition point for the gas, the addition point for gas is configured such that elevated turbulence is generated. A process for producing pulverulent polymers, in which an increase in flow turbulence in the gas flow in the region of the apparatus for dropletization also is disclosed.Type: ApplicationFiled: February 26, 2018Publication date: July 23, 2020Inventors: Stephan Bauer, Markus Toennessen, Christophe Bauduin, Katrin Baumann, Marco Krüger, Andreas Daiss, Markus Muehl
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Patent number: 10683371Abstract: 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.Type: GrantFiled: November 15, 2016Date of Patent: June 16, 2020Assignee: BASF SEInventors: Marco Krueger, Karl Possemiers, Gerald Gruenewald, Juergen Freiberg, Markus Muehl
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Method for the production of absorbent polymer particles by polymerizing drops of a monomer solution
Patent number: 10450395Abstract: A process for preparing water-absorbing polymer beads by polymerizing droplets comprising at least one monomer in a gas phase surrounding the droplets, the droplets being obtained by enveloping a first monomer solution with a second monomer solution and polymerizing the second monomer solution and polymerizing to give a more highly crosslinked polymer than the first monomer solution.Type: GrantFiled: August 1, 2013Date of Patent: October 22, 2019Assignee: BASF SEInventors: Dennis Lösch, Matthias Weismantel, Marco Krüger, Antje Ziemer -
Patent number: 10335756Abstract: The invention relates to an apparatus for introduction of droplets into a reactor, comprising a holder for at least one dropletizer unit, where the dropletizer unit has a feed for a liquid to be dropletized and a dropletizer plate and the dropletizer plate has holes through which a liquid to be dropletized is introduced into the reactor, where the holder for the at least one dropletizer unit can be pushed into the reactor or pulled out of the reactor through an opening in the shell of the reactor. At least one rail is accommodated within the reactor and is used to guide the holder for the at least one dropletizer unit along it.Type: GrantFiled: March 23, 2016Date of Patent: July 2, 2019Assignee: BASF SEInventors: Robert Bayer, Juergen Freiberg, Oliver Gampfer, Marco Krueger
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Patent number: 10252238Abstract: An apparatus for producing pulverulent poly(meth)acrylate in a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the production 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 and a fluidized bed, and above the gas withdrawal point the reactor has a region having a constant hydraulic internal diameter and below the gas withdrawal point the reactor has a hydraulic internal diameter that steadily decreases. The reactor has a heating means in the region having a steadily decreasing hydraulic internal diameter.Type: GrantFiled: February 25, 2016Date of Patent: April 9, 2019Assignee: BASF SEInventors: Robert Bayer, Jürgen Freiberg, Rudolf Schliwa, Marco Krüger
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Patent number: 10208149Abstract: A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution, comprising monomers bearing acid groups, in a gas phase surrounding the droplets, wherein the monomer solution comprises polyvalent cations and the polymer beads have a mean diameter of at least 150 ?m.Type: GrantFiled: October 21, 2016Date of Patent: February 19, 2019Assignee: BASF SEInventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Loesch, Rüdiger Funk, Annemarie Hillebrecht
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Patent number: 10150091Abstract: An apparatus for addition of droplets of a monomer solution for production of poly(meth)acrylate to a reactor for droplet polymerization, comprising at least one channel or a dropletizer head having, at its base, holes through which the solution is dropletized into the reactor, at least one of the following features being fulfilled: (a) the ratio of the area covered by the channels or the dropletizer head in the reactor relative to the area which is defined by the circumference of a line along the outermost holes is less than 50%, (b) the number of holes relative to the area which is defined by the circumference of a line along the outermost holes is within a range from 100 to 1000 holes/m2.Type: GrantFiled: June 16, 2015Date of Patent: December 11, 2018Assignee: BASF SEInventors: Andreas Daiss, Robert Bayer, Rudolf Schliwa, Jürgen Freiberg, Karl J. Possemiers, Marco Krüger
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Publication number: 20180326392Abstract: 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 and a fluidized bed, the reactor comprising a reactor shell between the apparatus for dropletization and the gas withdrawal point and having, above the fluidized bed, a region having decreasing hydraulic diameter toward the fluidized bed and having a maximum hydraulic diameter greater than the mean hydraulic diameter of the reactor shell, and the reactor shell projecting into the region having decreasing hydraulic diameter, so as to form an annular duct between the outer wall of the reactor shell and the wall by which the region having decreasing hydraulic diameter is bounded,Type: ApplicationFiled: November 16, 2016Publication date: November 15, 2018Inventors: Marco Krüger, Karl Possemiers, Rudolf Schliwa, Robert Bayer
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Publication number: 20180126351Abstract: The invention relates to an apparatus for introduction of droplets into a reactor, comprising a holder for at least one dropletizer unit, where the dropletizer unit has a feed for a liquid to be dropletized and a dropletizer plate and the dropletizer plate has holes through which a liquid to be dropletized is introduced into the reactor, where the holder for the at least one dropletizer unit can be pushed into the reactor or pulled out of the reactor through an opening in the shell of the reactor. At least one rail is accommodated within the reactor and is used to guide the holder for the at least one dropletizer unit along it.Type: ApplicationFiled: March 23, 2016Publication date: May 10, 2018Applicant: BASF SEInventors: Robert Bayer, Juergen Freiberg, Oliver Gampfer, Marco Krueger
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Patent number: 9925511Abstract: An apparatus for introducing droplets of a monomer solution for production of poly(meth)acrylate into a reactor for droplet polymerization, comprising at least one channel or a dropletizer head, the channel or the dropletizer head being sealed at its base by a dropletizer plate, the dropletizer plate having holes through which the monomer solution is introduced into the reactor, and the dropletizer plate being configured such that holes that, in an axially symmetric dropletizer plate or in an annular dropletizer plate or in one configured as a ring segment, are not on a center line of the dropletizer plate or, in the case of a circular dropletizer plate, are not at the center of the dropletizer plate are aligned such that monomer solution is introduced through the holes into the reactor at an angle to the vertical, and the holes in the case of a radial alignment of axially symmetric dropletizer plates being aligned such that the angle at which the monomer solution is introduced into the reactor decreases in tType: GrantFiled: June 23, 2015Date of Patent: March 27, 2018Assignee: BASF SEInventors: Andreas Daiss, Robert Bayer, Rudolf Schliwa, Jürgen Freiberg, Karl J. Possemiers, Marco Krüger
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Publication number: 20180065102Abstract: An apparatus for producing pulverulent poly(meth)acrylate in a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the production 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 and a fluidized bed, and above the gas withdrawal point the reactor has a region having a constant hydraulic internal diameter and below the gas withdrawal point the reactor has a hydraulic internal diameter that steadily decreases. The reactor has a heating means in the region having a steadily decreasing hydraulic internal diameter.Type: ApplicationFiled: February 25, 2016Publication date: March 8, 2018Inventors: Robert Bayer, Jürgen Freiberg, Rudolf Schliwa, Marco Krüger
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Publication number: 20180028999Abstract: An apparatus for producing pulverulent poly(meth)acrylate in a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the production 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 and a fluidized bed, and above the gas withdrawal point the reactor has a region having a constant hydraulic internal diameter and below the gas withdrawal point the reactor has a hydraulic internal diameter that steadily decreases.Type: ApplicationFiled: March 1, 2016Publication date: February 1, 2018Inventors: Robert Bayer, Jürgen Freiberg, Rudolf Schliwa, Marco Krüger
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Patent number: 9809686Abstract: 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.Type: GrantFiled: July 16, 2014Date of Patent: November 7, 2017Assignee: BASF SEInventors: Joerg Erbes, Stefan Muessig, Tobias Kortekamp, Marco Krueger, Markus Steffen, Angela Ulzhoefer, Cecile Schneider, Alexandra Wiedemann, Simon Gramlich
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Publication number: 20170246607Abstract: An apparatus for production of pulverulent poly(meth)acrylate, comprising a reactor or droplet polymerization, having an apparatus for dropletization of a monomer solution for the production of the poly(meth)acrylate, having holes through which the solution is dropletized, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the periphery of the reactor and a fluidized bed. The outermost holes through which the solution is dropletized are positioned such that a droplet falling vertically downward falls into the fluidized bed and the hydraulic diameter at the level of the midpoint between the apparatus for dropletization and the gas withdrawal point is at least 10% greater than the hydraulic diameter of the fluidized bed.Type: ApplicationFiled: June 10, 2015Publication date: August 31, 2017Applicant: BASF SEInventors: Andreas Daiss, Robert Bayer, Rudolf Schliwa, Jürgen Freiberg, Karl J. Possemiers, Marco Krüger