Patents by Inventor Arndt Selbach
Arndt Selbach 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: 9458083Abstract: The present invention relates to a process for hydrolysis of acetone cyanohydrin (ACH) by means of sulphuric acid within the ACH sulpho process for preparation of methacrylic acid (MAA) or methyl methacrylate (MMA).Type: GrantFiled: March 6, 2013Date of Patent: October 4, 2016Assignee: EVONIK ROEHM GmbHInventors: Arndt Selbach, Lorenza Sartorelli, Andreas Perl, Joachim Deinken, Stefanie Sohnemann, Norbert Mnich, Matthias Groemping, Udo Gropp, Thomas Mertz
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Patent number: 9169194Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.Type: GrantFiled: March 15, 2013Date of Patent: October 27, 2015Assignee: EVONIK RÖHM GmbHInventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
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Publication number: 20150045577Abstract: The present invention relates to a process for hydrolysis of acetone cyanohydrin (ACH) by means of sulphuric acid within the ACH sulpho process for preparation of methacrylic acid (MAA) or methyl methacrylate (MMA).Type: ApplicationFiled: March 6, 2013Publication date: February 12, 2015Applicant: Evonik Roehm GmbHInventors: Arndt Selbach, Lorenza Sartorelli, Andreas Perl, Joachim Deinken, Stefanie Sohnemann, Norbert Mnich, Matthias Groemping, Udo Gropp, Thomas Mertz
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Publication number: 20130211140Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.Type: ApplicationFiled: March 15, 2013Publication date: August 15, 2013Inventors: Lorenza SARTORELLI, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
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Patent number: 8445617Abstract: The invention relates to producing a superabsorbent polymer comprising (I) producing a (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising a low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase by forming crystals to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.Type: GrantFiled: November 5, 2012Date of Patent: May 21, 2013Assignee: Evonik Degussa GmbHInventors: Torsten Balduf, Gunther Bub, Jurgen Mosler, Andreas Sabbagh, Jurgen Kohn, Arndt Selbach
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Patent number: 8309668Abstract: The present invention relates to a process for producing a superabsorbent a polymer comprises (I) producing a pure (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers or (meth)acrylic acid oligomers or both; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.Type: GrantFiled: May 1, 2012Date of Patent: November 13, 2012Assignee: Evonik Stockhausen GmbHInventors: Torsten Balduf, Günther Bub, Jürgen Mosler, Andreas Sabbagh, Jürgen Kohn, Arndt Selbach
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Publication number: 20120226003Abstract: In some embodiments, a process for producing a polymer comprises (I) producing a pure (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers or (meth)acrylic acid oligomers or both; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.Type: ApplicationFiled: May 1, 2012Publication date: September 6, 2012Inventors: Torsten Balduf, Gunther Bub, Jurgen Mosler, Andreas Sabbagh, Jurgen Kohn, Arndt Selbach
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Patent number: 8178717Abstract: A process for production of (meth)acrylic acid is disclosed. The process includes synthesizing and distillatively working-up a crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase including (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers. At least a part of the (meth)acrylic acid dimers and/or of the (meth)acrylic acid oligomers from the dimer phase is split to obtain a (meth)acrylic acid including a low-boiling phase and a high-boiling phase including less (meth)acrylic acid than the low-boiling phase. At least a part of the (meth)acrylic acid from the low-boiling phase is separated by forming of one or more crystals to obtain a pure (meth)acrylic acid and a residue. Also disclosed is a device for production of (meth)acrylic acid, a process for production of a polymer as well as chemical products based on or including (meth)acrylic acid or a polymer as well as the use of (meth)acrylic acid or polymers in chemical products.Type: GrantFiled: August 11, 2006Date of Patent: May 15, 2012Assignee: Evonik Stockhausen GmbHInventors: Torsten Balduf, Günther Bub, Jürgen Mosler, Andreas Sabbagh, Jürgen Kohn, Arndt Selbach
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Publication number: 20120010430Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.Type: ApplicationFiled: March 26, 2010Publication date: January 12, 2012Applicant: Evonik Roehm GmbHInventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
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Publication number: 20100249449Abstract: The present invention relates to a process for preparing carboxamides by amidating nitriles in the presence of sulphuric acid, wherein the reaction is performed in a Taylor reactor. The process enables a simple and inexpensive preparation of these compounds. The present invention further provides processes for preparing (meth)acrylamides and alkyl(meth)acrylates, which comprise an inventive amidation reaction.Type: ApplicationFiled: August 15, 2008Publication date: September 30, 2010Applicant: Evonik Roehm GmbHInventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach
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Patent number: 7557246Abstract: The present invention relates to a process for production of (meth)acrylic acid, whereby first a crude (meth)acrylic acid is produced and this crude (meth)acrylic acid is then continuously purified, whereby the continuous purification of the crude (meth)acrylic acid comprises the following process steps: a) in a composition comprising (meth)acrylic acid and impurities, precipitating the impurities in crystalline form from the composition; and b) separating the crystalline impurities precipitated from the composition. The invention also relates to the (meth)acrylic acid obtainable by this process, a device for production of (meth)acrylic acid, the use of the device or of a purification device for production of (meth)acrylic acid, (meth)acrylic acid, water-absorbing polymers, the use of water-absorbing polymers as well as fibers, sheets, foams and composites.Type: GrantFiled: July 15, 2005Date of Patent: July 7, 2009Assignee: Evonik Stockhausen GmbHInventors: Stefan Nordhoff, Torsten Balduf, Jürgen Mosler, Wilfried Uhlich, Dennis Thong Yu-Chiang, Axel Kobus, Arndt Selbach, Jürgen Kohn
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Publication number: 20080287616Abstract: A process for production of (meth)acrylic acid is disclosed. The process includes synthesizing and distillatively working-up a crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase including (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers. At least a part of the (meth)acrylic acid dimers and/or of the (meth)acrylic acid oligomers from the dimer phase is split to obtain a (meth)acrylic acid including a low-boiling phase and a high-boiling phase including less (meth)acrylic acid than the low-boiling phase. At least a part of the (meth)acrylic acid from the low-boiling phase is separated by forming of one or more crystals to obtain a pure (meth)acrylic acid and a residue. Also disclosed is a device for production of (meth)acrylic acid, a process for production of a polymer as well as chemical products based on or including (meth)acrylic acid or a polymer as well as the use of (meth)acrylic acid or polymers in chemical products.Type: ApplicationFiled: August 11, 2006Publication date: November 20, 2008Inventors: Torsten Balduf, Gunther Bub, Jurgen Mosler, Andreas Sabbagh, Jurgen Kohn, Arndt Selbach
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Publication number: 20080091048Abstract: The present invention relates to a process for production of (meth)acrylic acid, whereby first a crude (meth)acrylic acid is produced and this crude (meth)acrylic acid is then continuously purified, whereby the continuous purification of the crude (meth)acrylic acid comprises the following process steps: a) in a composition comprising (meth)acrylic acid and impurities, precipitating the impurities in crystalline form from the composition; and b) separating the crystalline impurities precipitated from the composition. The invention also relates to the (meth)acrylic acid obtainable by this process, a device for production of (meth)acrylic acid, the use of the device or of a purification device for production of (meth)acrylic acid, (meth)acrylic acid, water-absorbing polymers, the use of water-absorbing polymers as well as fibers, sheets, foams and composites.Type: ApplicationFiled: July 15, 2005Publication date: April 17, 2008Applicant: STOCKHAUSEN GMBHInventors: Stefan Nordhoff, Torsten Balduf, Jurgen Mosler, Wilfired Uhlich, Dennis Thong Yu-Chiang, Axel Kobus, Arndt Selbach, Jurgen Kohn
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Publication number: 20070262022Abstract: A separating tray for a column for distillation of a polymerizable material is disclosed. The separating tray comprising at least one tray plate with a plurality of openings and at least one attachment. The at least one attachment divides the plurality of openings into groups. Also, the at least one attachment defines apertures through which a fluid can flow.Type: ApplicationFiled: March 29, 2005Publication date: November 15, 2007Inventors: Jurgen Mosler, Hans-Gunter Sparenberg, Ludwig Papajewski, Arndt Selbach, Jorg Leistner, Jurgen Kohn