Patents by Inventor Matthias Weismantel

Matthias Weismantel 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).

  • Publication number: 20220187034
    Abstract: The invention relates to a heat exchanger for heating gas to a temperature in the range from 150 to 400° C., wherein the gas is heated by indirect heat transfer and all the surfaces of the walls of the heat exchanger which come into contact with the gas have been hot dip galvanized and the surfaces which come into contact with the gas, after the hot dip galvanization, have been heat treated at a temperature in the range from 400 to 750° C. The invention further relates to the use of the heat exchanger.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Inventors: Oskar Stephan, Karl-Friedrich Schneider, Matthias Weismantel
  • Publication number: 20220185924
    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.
    Type: Application
    Filed: February 21, 2020
    Publication date: June 16, 2022
    Inventors: Monte Alan Peterson, Ruediger Funk, Matthias Weismantel, Juergen Schroeder
  • Publication number: 20220089789
    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.
    Type: Application
    Filed: January 13, 2020
    Publication date: March 24, 2022
    Inventors: Rene Callot, Karl Possemiers, Ruediger Funk, Marco Krueger, Matthias Weismantel, Juergen Schroeder
  • Publication number: 20220016596
    Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising storing acrylic acid in at least one tank (B1) at a production site for acrylic acid and in at least one tank (B2) at a production site for superabsorbent polymer particles, wherein the at least one tank (B1) at the production site for acrylic acid and the at least one tank (B2) at the production site for superabsorbent polymer particles are interconnected by one single pipe line (3) and the flow inside the pipe line (3) is temporary reversed during interruptions of the production superabsorbent polymer particles.
    Type: Application
    Filed: November 4, 2019
    Publication date: January 20, 2022
    Inventors: Monte Alan Peterson, John Perry Guentzel, Juergen Schroeder, Ruediger Funk, Matthias Weismantel
  • Publication number: 20210402373
    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.
    Type: Application
    Filed: November 4, 2019
    Publication date: December 30, 2021
    Inventors: Monte Alan Peterson, Ronny De Kaey, Karl Possemiers, Juergen Schroeder, Ruediger Funk, Matthias Weismantel
  • Publication number: 20210402370
    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.
    Type: Application
    Filed: November 4, 2019
    Publication date: December 30, 2021
    Inventors: Monte Alan Peterson, Ronny De Kaey, Karl Possemiers, Juergen Schroeder, Ruediger Funk, Matthias Weismantel
  • Publication number: 20210338882
    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.
    Type: Application
    Filed: September 17, 2019
    Publication date: November 4, 2021
    Inventors: Rene Callot, Ruediger Funk, Marco Krueger, Thomas Pfeiffer, Karl Possemiers, Juergen Schroeder, Matthias Weismantel
  • Publication number: 20210291145
    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.
    Type: Application
    Filed: July 15, 2019
    Publication date: September 23, 2021
    Inventors: Marco Krueger, Ruediger Funk, Thomas Pfeiffer, Karl Possemiers, Juergen Schroeder, Matthias Weismantel
  • Publication number: 20210154637
    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.
    Type: Application
    Filed: August 9, 2019
    Publication date: May 27, 2021
    Inventors: Thomas Pfeiffer, Ruediger Funk, Marco Krueger, Karl Possemiers, Juergen Schroeder, Matthias Weismantel
  • Patent number: 10875972
    Abstract: A process for producing superabsorbents, comprising polymerization, drying, crushing, pneumatic conveying, comminuting and classifying, wherein the gas temperature at the end of the pneumatic conveying is from 50 to 95° C.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: December 29, 2020
    Assignee: BASF SE
    Inventors: Gerald Grünewald, Ruediger Funk, Matthias Weismantel
  • Publication number: 20200392258
    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.
    Type: Application
    Filed: February 11, 2019
    Publication date: December 17, 2020
    Inventors: Thomas Pfeiffer, Matthias Weismantel, Jürgen Schröder, Karl Possemiers, Marco Krueger, Ruediger Funk
  • Publication number: 20200316561
    Abstract: The invention relates to a belt drier arrangement for drying an aqueous polymer gel and for comminuting the dried polymer gel to give dried polymer particles, comprising: a drier setup for drying an aqueous polymer gel, a comminuting arrangement downstream of the drier setup relative to the product flow direction, for comminuting the dried polymer gel to give dried polymer particles. In accordance with the invention the comminuting arrangement comprises at least a first comminutor and a second comminutor, each having a rotatable shaft with functional tools, the second comminutor being disposed downstream of the first comminutor relative to the product flow direction.
    Type: Application
    Filed: May 24, 2017
    Publication date: October 8, 2020
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel
  • Publication number: 20200283588
    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.
    Type: Application
    Filed: October 9, 2018
    Publication date: September 10, 2020
    Inventors: Oskar Stephan, Gerald Gruenewald, Matthias Weismantel, Karl Possemiers, Monte Alan Peterson, Ruediger Funk, Sylvia Bertha, Tom Catternan
  • Publication number: 20200216622
    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.
    Type: Application
    Filed: July 6, 2018
    Publication date: July 9, 2020
    Inventors: Rüdiger FUNK, Thomas PFEIFFER, Matthias WEISMANTEL, Monte Alan PETERSON, Karl POSSEMIERS, Ronny DE KAEY
  • Publication number: 20200147652
    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.
    Type: Application
    Filed: July 20, 2018
    Publication date: May 14, 2020
    Inventors: Rüdiger Funk, Matthias Weismantel, Monte Alan Peterson, Patrick Neal Hamilton, Ronny De Kaey, Karl Possemiers
  • Patent number: 10648731
    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.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: May 12, 2020
    Assignee: BASF SE
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel, Karl Possemiers
  • Patent number: 10647787
    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 having a drier setup in the interior, in which drying air in the interior of the drier setup is conducted in countercurrent counter to the conveying direction and the interior of the drier setup is kept substantially at a reduced pressure relative to the ambient pressure outside the drier setup, and the interior has and/or forms a pressure zone, and is especially divided into a number of pressure zones.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: May 12, 2020
    Assignee: BASF SE
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel
  • Patent number: 10450395
    Abstract: 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: Grant
    Filed: August 1, 2013
    Date of Patent: October 22, 2019
    Assignee: BASF SE
    Inventors: Dennis Lösch, Matthias Weismantel, Marco Krüger, Antje Ziemer
  • Publication number: 20190276608
    Abstract: A process for producing superabsorbents, comprising polymerization, drying, crushing, pneumatic conveying, comminuting and classifying, wherein the gas temperature at the end of the pneumatic conveying is from 50 to 95° C.
    Type: Application
    Filed: May 23, 2017
    Publication date: September 12, 2019
    Inventors: Gerald Grünewald, Ruediger Funk, Matthias Weismantel
  • Publication number: 20190255514
    Abstract: Filling process for superabsorbent polymer particles The invention relates to a filling process for superabsorbent polymer particles, comprising discharging the superabsorbent polymer particles out of a silo into bulk container for shipping, wherein the filling level of the silo during filling of the bulk container is never less than 20%, in order to avoid particle segregation.
    Type: Application
    Filed: October 16, 2017
    Publication date: August 22, 2019
    Inventors: Dieter Hermeling, Rüdiger Funk, Matthias Weismantel, Monte Alan Peterson, Peter Leunis, Karl Possemiers