Patents by Inventor Marc Hager
Marc Hager 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: 10429128Abstract: The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature equal to or above 150° C. in a fluidized bed dryer at a fast heat-up rate, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention.Type: GrantFiled: December 18, 2012Date of Patent: October 1, 2019Assignee: Evonik Degussa GmbHInventors: Herbert Gartner, Marc Hager, Harald Plochinger, Sabine Auernig, Hans-Peter Kohler, Elisabeth Lacker
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Patent number: 9255190Abstract: The invention relates generally to a process for the preparation of water-absorbent polymer particles, including the process steps of preparing particulate water-absorbent polymer and mixing the particulate water-absorbent polymer with an aqueous crosslinker solution and heat-treating the mixture of particulate water-absorbent polymer in a horizontally operated mixing device, wherein the horizontally operated mixing device is hydraulically driven. The invention also relates to water-absorbent polymer particles obtainable by such a process.Type: GrantFiled: December 14, 2012Date of Patent: February 9, 2016Assignee: Evonik Industries AGInventors: Harald Plochinger, Daniel Fricker, Richard Walther, Marc Hager
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Patent number: 9085648Abstract: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.Type: GrantFiled: December 20, 2013Date of Patent: July 21, 2015Assignee: Evonik Degussa GmbHInventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jorg Harren, Hans-Peter Kohler, Harald Plochinger
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Publication number: 20150105527Abstract: The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature in the range of from 100 to 250° C. in a fluidized bed dryer under specifically adapted apparatus and method conditions, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention.Type: ApplicationFiled: December 18, 2012Publication date: April 16, 2015Applicant: EVONIK DEGUSSA GMBHInventors: Herbert Gartner, Marc Hager, Harald Plochinger, Sabine Auernig, Hans-Peter Kohler, Elisabeth Lacker
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Publication number: 20140345154Abstract: The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature equal to or above 150° C. in a fluidized bed dryer at a fast heat-up rate, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention.Type: ApplicationFiled: December 18, 2012Publication date: November 27, 2014Applicant: EVONIK DEGUSSA GMBHInventors: Herbert Gartner, Marc Hager, Harald Plochinger, Sabine Auernig, Hans-Peter Kohler, Elisabeth Lacker
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Publication number: 20140323663Abstract: The invention relates generally to a process for the preparation of water-absorbent polymer particles, including the process steps of preparing particulate water-absorbent polymer and mixing the particulate water-absorbent polymer with an aqueous crosslinker solution and heat-treating the mixture of particulate water-absorbent polymer in a horizontally operated mixing device, wherein the horizontally operated mixing device is hydraulically driven. The invention also relates to water-absorbent polymer particles obtainable by such a process.Type: ApplicationFiled: December 14, 2012Publication date: October 30, 2014Inventors: Harald Plöchinger, Daniel Fricker, Richard Walther, Marc Hager
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Publication number: 20140121322Abstract: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.Type: ApplicationFiled: December 20, 2013Publication date: May 1, 2014Applicant: Evonik Degussa GmbHInventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jorg Harren, Hans-Peter Kohler, Harald Plochinger
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Patent number: 8653210Abstract: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.Type: GrantFiled: July 30, 2012Date of Patent: February 18, 2014Assignee: Evonik Degussa GmbHInventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jorg Harren, Hans-Peter Kohler, Harald Plöchinger
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Patent number: 8357766Abstract: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.Type: GrantFiled: October 7, 2009Date of Patent: January 22, 2013Assignee: Evonik Stockhausen GmbHInventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jörg Harren, Hans-Peter Kohler, Harald Plöchinger
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Publication number: 20120309905Abstract: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.Type: ApplicationFiled: July 30, 2012Publication date: December 6, 2012Inventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jörg Harren, Hans-Peter Kohler, Harald Plöchinger
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Patent number: 8252873Abstract: The present invention relates to superabsorbent polymer comprising the comprising the free radical polymerization product of an aqueous monomer mixture containing at least one ?,?-ethylenically unsaturated monomer; at least one monomer having at least two ?,?-ethylenically unsaturated groups; a crosslinking agent having at least two polymerizable double bonds; iron ions in an amount of from about 0.1 to about 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a molar ratio of chelating agent to iron ion of from about 0.8 to about 4.0.Type: GrantFiled: April 13, 2012Date of Patent: August 28, 2012Assignee: Evonik Stockhausen GmbHInventors: Herbert Gartner, Jorg Harren, Marc Hager, Harald Plochinger, Daniel Fricker, Hans-Peter Kohler, Sabine Auernig
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Publication number: 20120202951Abstract: The present invention relates to superabsorbent polymer comprising the comprising the free radical polymerization product of an aqueous monomer mixture containing at least one ?,?-ethylenically unsaturated monomer; at least one monomer having at least two ?,?-ethylenically unsaturated groups; a crosslinking agent having at least two polymerizable double bonds; iron ions in an amount of from about 0.1 to about 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a molar ratio of chelating agent to iron ion of from about 0.8 to about 4.0.Type: ApplicationFiled: April 13, 2012Publication date: August 9, 2012Inventors: Herbert Gartner, Jorg Harren, Marc Hager, Harald Plochinger, Daniel Fricker, Hans-Peter Kohler, Sabine Auerning
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Patent number: 8198385Abstract: The present invention relates to process for the preparation of a superabsorbent polymer comprising the steps of a) subjecting an aqueous monomer mixture containing at least one ?,?-ethylenically unsaturated monomer; at least one monomer bearing at least two ?,?-ethylenically unsaturated groups; iron ions in an amount of 0.1 to 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a mol ratio of chelating agent to iron ion of 0.8 to 4.0 to free radical polymerization in an reactor to obtain a super-absorbent polymer; and b) recovering the superabsorbent polymer, whereby if the process is continuous and is run in an agitated reactor the upper limit of the mol ratio of chelating agent to iron ion is 4.0 for a throughput of total reaction mixture through the reactor of at most 1.3 kg/h per liter reactor volume.Type: GrantFiled: November 9, 2010Date of Patent: June 12, 2012Assignee: Evonik Stockhausen GmbHInventors: Herbert Gartner, Jorg Harren, Marc Hager, Harald Plochinger, Daniel Fricker, Hans-Peter Kohler, Sabine Auernig
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Patent number: 8063121Abstract: The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer gel from the reactor; and drying the superabsorbent polymer gel. Where at least one off-gas stream removed from any stage of the process is subjected to scrubbing with a basic aqueous solution prior to venting to obtain an aqueous scrubber solution that is at least partially recycled to any of the above steps of the process.Type: GrantFiled: October 7, 2009Date of Patent: November 22, 2011Assignee: Evonik Stockhausen GmbHInventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jörg Harren, Hans-Peter Kohler, Harald Plöchinger
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Patent number: 8048942Abstract: The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer from the reactor; and working-up the superabsorbent polymer removed from the reactor to obtain a final product, whereby a basic aqueous medium comprising carbonate and/or hydrogen carbonate is fed to the superabsorbent polymer gel.Type: GrantFiled: October 7, 2009Date of Patent: November 1, 2011Assignee: Evonik Stockhausen GmbHInventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jörg Harren, Hans-Peter Kohler, Harald Plöchinger
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Publication number: 20110245436Abstract: The present invention relates to process for the preparation of a superabsorbent polymer comprising the steps of a) subjecting an aqueous monomer mixture containing at least one ?,?-ethylenically unsaturated monomer; at least one monomer bearing at least two ?,?-ethylenically unsaturated groups; iron ions in an amount of 0.1 to 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a mol ratio of chelating agent to iron ion of 0.8 to 4.0 to free radical polymerization in an reactor to obtain a super-absorbent polymer; and b) recovering the superabsorbent polymer, whereby if the process is continuous and is run in an agitated reactor the upper limit of the mol ratio of chelating agent to iron ion is 4.0 for a throughput of total reaction mixture through the reactor of at most 1.3 kg/h per liter reactor volume.Type: ApplicationFiled: November 9, 2010Publication date: October 6, 2011Applicant: EVONIK STOCKHAUSEN GMBHInventors: Herbert Gartner, Jorg Harren, Marc Hager, Harald Plochinger, Daniel Fricker, Hans-Peter Kohler, Sabine Auernig
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Publication number: 20100105808Abstract: The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.Type: ApplicationFiled: October 7, 2009Publication date: April 29, 2010Inventors: Daniel Fricker, Herbert GARTNER, Marc HAGER, Jörg HARREN, Hans-Peter KOHLER, Harald PLÖCHINGER
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Publication number: 20100105809Abstract: The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer gel from the reactor; and drying the superabsorbent polymer gel. Where at least one off-gas stream removed from any stage of the process is subjected to scrubbing with a basic aqueous solution prior to venting to obtain an aqueous scrubber solution that is at least partially recycled to any of the above steps of the process.Type: ApplicationFiled: October 7, 2009Publication date: April 29, 2010Inventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jörg Harren, Hans-Peter Kohler, Harald Plöchinger
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Publication number: 20100099799Abstract: The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer from the reactor; and working-up the superabsorbent polymer removed from the reactor to obtain a final product, whereby a basic aqueous medium comprising carbonate and/or hydrogen carbonate is fed to the superabsorbent polymer gel.Type: ApplicationFiled: October 7, 2009Publication date: April 22, 2010Inventors: Daniel Fricker, Herbert Gartner, Marc Hager, Jörg Harren, Hans-Peter Kohler, Harald Plöchinger