Patents by Inventor Matthias Klötzer
Matthias Klötzer 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: 9061971Abstract: The present invention comprises a process for purifying isocyanate-comprising residues.Type: GrantFiled: September 21, 2006Date of Patent: June 23, 2015Assignee: BASF AktiengesellschaftInventors: Andreas Wölfert, Carsten Knösche, Matthias Klötzer, Hermann Ascherl, Eckhard Stroefer, Heinrich-Josef Blankertz, Michael Schönherr, Martin Karches, Christian Benz
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Patent number: 8871969Abstract: The invention provides a multistage process for continuously preparing organic polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols into monomeric polyurethanes of low molecular mass, and the dissociation of said polyurethanes. The invention further provides an associated preparation process in which at certain reaction stages the polyisocyanates prepared and unutilizable residues are removed and reusable by-products and intermediates are recycled to preliminary stages.Type: GrantFiled: May 30, 2012Date of Patent: October 28, 2014Assignee: BASF SEInventors: Torsten Mattke, Matthias Klötzer, Robert Baumann
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Patent number: 8859805Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric polyurethanes and thermal dissociation of the latter, in which the polyisocyanates produced and unusable residues are separated off at particular stages of the reaction and reusable by-products and intermediates are recirculated to preceding stages.Type: GrantFiled: September 9, 2010Date of Patent: October 14, 2014Assignee: BASF SEInventors: Torsten Mattke, Matthias Kloetzer, Eckhard Stroefer, Bernhard Geissler, Peter Zehner
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Patent number: 8729291Abstract: A process for preparing urethanes by reacting aromatic diamines with a dialkyl carbonate, wherein the alkyl radical of the organic dialkyl carbonate comprises 2-18 carbon atoms and one or more heteroatoms and the reaction is performed in the presence of a catalyst.Type: GrantFiled: August 18, 2009Date of Patent: May 20, 2014Assignee: BASF SEInventors: Axel Franzke, Robert Baumann, Michael Bock, Roderich Roettger, Andreas Leitner, Matthias Kloetzer
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Patent number: 8546605Abstract: The invention provides a multistage process for continuously preparing organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to low molecular mass monomeric polyurethanes, and thermally cleaving said polyurethanes, in which at defined reaction stages the polyisocyanates prepared and unusable residues are separated off, and reusable by products and intermediates are recycled to upstream stages.Type: GrantFiled: September 5, 2006Date of Patent: October 1, 2013Assignee: BASF AktiengesellschaftInventors: Matthias Kloetzer, Eckhard Stroefer, Volker Krase, Andreas Schmidt, Peter Scherbel
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Patent number: 8492580Abstract: The invention relates to an improved multistage process for the continuous preparation of diisocyanates by reaction of the corresponding diamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric urethanes and thermal dissociation of the latter.Type: GrantFiled: August 2, 2010Date of Patent: July 23, 2013Assignee: BASF SEInventors: Bernhard Geissler, Eckhard Stroefer, Andreas Schmidt, Matthias Kloetzer
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Publication number: 20130006013Abstract: The invention provides a multistage process for continuously preparing organic polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols into monomeric polyurethanes of low molecular mass, and the dissociation of said polyurethanes. The invention further provides an associated preparation process in which at certain reaction stages the polyisocyanates prepared and unutilizable residues are removed and reusable by-products and intermediates are recycled to preliminary stages.Type: ApplicationFiled: May 30, 2012Publication date: January 3, 2013Applicant: BASF SEInventors: Torsten Mattke, Matthias Klötzer, Robert Baumann
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Publication number: 20120172621Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric polyurethanes and thermal dissociation of the latter, in which the polyisocyanates produced and unusable residues are separated off at particular stages of the reaction and reusable by-products and intermediates are recirculated to preceding stages.Type: ApplicationFiled: September 9, 2010Publication date: July 5, 2012Applicant: BASF SEInventors: Torsten Mattke, Matthias Kloetzer, Eckhard Stroefer, Bernhard Geissler, Peter Zehner
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Patent number: 8193385Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable isocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic amines with urea and alcohols to liberate ammonia and form low molecular weight monomeric urethanes and thermal dissociation of the latter, in which by-products formed are at least partly utilized.Type: GrantFiled: August 8, 2007Date of Patent: June 5, 2012Assignee: BASF SEInventors: Matthias Kloetzer, Heinrich-Josef Blankertz, Gunter Georgi, Eckhard Stroefer, Volker Krase, Gerhard Schulz, Andreas Warzecha
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Patent number: 8026387Abstract: The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof.Type: GrantFiled: January 9, 2007Date of Patent: September 27, 2011Assignee: BASF AktiengesellschaftInventors: Matthias Kloetzer, Eckhard Stroefer, Heinrich-Josef Blankertz
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Publication number: 20110207961Abstract: The invention relates to an improved multistage process for the continuous preparation of diisocyanates by reaction of the corresponding diamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric urethanes and thermal dissociation of the latter.Type: ApplicationFiled: August 2, 2010Publication date: August 25, 2011Applicant: BASF SEInventors: Bernhard Geissler, Eckhard Stroefer, Andreas Schmidt, Matthias Kloetzer
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Publication number: 20110137067Abstract: A process for preparing urethanes by reacting aromatic diamines with a dialkyl carbonate, wherein the alkyl radical of the organic dialkyl carbonate comprises 2-18 carbon atoms and one or more heteroatoms and the reaction is performed in the presence of a catalyst.Type: ApplicationFiled: August 18, 2009Publication date: June 9, 2011Applicant: BASF SEInventors: Axel Franzke, Robert Baumann, Michael Bock, Roderich Roettger, Andreas Leitner, Matthias Kloetzer
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Publication number: 20100274046Abstract: The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof.Type: ApplicationFiled: January 9, 2007Publication date: October 28, 2010Applicant: BASF SEInventors: Matthias Kloetzer, Eckhard Stroefer, Heinrich-Josef Blankertz
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Publication number: 20090275775Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable isocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic amines with urea and alcohols to liberate ammonia and form low molecular weight monomeric urethanes and thermal dissociation of the latter, in which by-products formed are at least partly utilized.Type: ApplicationFiled: August 8, 2007Publication date: November 5, 2009Applicant: BASF SEInventors: Matthias Kloetzer, Heinrich-Josef Blankertz, Gunter Georgi, Eckhard Stroefer, Volker Krase, Gerhard Schulz, Warzecha Andreas
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Patent number: 7531084Abstract: A reactor for the thermal cleavage of monofunctional and/or polyfunctional carbamic esters into the corresponding isocyanate and hydroxyl components in the liquid phase having devices for introduction of heat into the reactor, where the devices are heat exchanger plates through which a heat transfer medium flows and have a geometry defined by the ratio of the degassing area to the volume and arrangement of the heating surfaces which makes it possible for the cleavage to be carried out in a two-phase mixture which has a gas content of over 50% by volume.Type: GrantFiled: April 9, 2003Date of Patent: May 12, 2009Assignee: BASF AktiengesellschaftInventors: Dieter Starosta, Peter Pfab, Volker Krase, Andreas Schmidt, Matthias Kloetzer, Andreas Otterbach
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Patent number: 7179935Abstract: A process for the preparation of isocyanates from carbamic esters.Type: GrantFiled: February 28, 2003Date of Patent: February 20, 2007Assignee: BASF AktiengesellschaftInventors: Eckhard Stroefer, Michael Ochse, Volker Krase, Andreas Schmidt, Matthias Kloetzer, Imbridt Murrar, Gisbert Franzke
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Patent number: 6750365Abstract: The present invention relates to a process for the dissociation of allophanates, in which a thermal dissociation is carried out in a reaction vessel and the gaseous dissociation products obtained are removed from the reaction vessel using an inert carrier gas or the vapor of a liquid as stripping medium and are condensed.Type: GrantFiled: April 29, 2002Date of Patent: June 15, 2004Assignee: BASF AktiengesellschaftInventors: Gerhard Laqua, Matthias Klötzer, Volker Krase, Peter Pfab, Joachim Pfeffinger, Andreas Schmidt
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Publication number: 20020161257Abstract: The present invention relates to a process for the dissociation of allophanates, in which a thermal dissociation is carried out in a reaction vessel and the gaseous dissociation products obtained are removed from the reaction vessel using an inert carrier gas or the vapor of a liquid as stripping medium and are condensed.Type: ApplicationFiled: April 29, 2002Publication date: October 31, 2002Applicant: BASF AktiengesellschaftInventors: Gerhard Laqua, Matthias Kloetzer, Volker Krase, Peter Pfab, Joachim Pfeffinger, Andreas Schmidt