Patents by Inventor Jan Nouwen
Jan Nouwen 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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Publication number: 20230032380Abstract: A device for lifting a steel reinforcement mat includes a grid of parallel rods in a first direction and, placed thereon and fastened permanently, parallel rods in a second direction, each according to a predetermined mesh width. The device has a hoisting frame suitable for being secured to a hoist. The hoisting frame has supporting elements on opposite sides positioned in such a way that when the hoisting frame rests on an uppermost steel reinforcement mat of a stack thereof, each supporting element is located in a respective mesh. The supporting elements are configured to slide in the first direction in such a way that during lifting, the supporting elements each support with a respective supporting surface exclusively rods in the second direction of exclusively the uppermost steel reinforcement mat. The supporting elements on the opposite sides slide away in the opposite direction to each other.Type: ApplicationFiled: December 7, 2020Publication date: February 2, 2023Inventors: Daan GILLEMAN, Jan NOUWEN
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Patent number: 7758730Abstract: The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine with a predefined maximum residual content of water. The invention further provides a rapid test of aging for checking the improvement in the color stability.Type: GrantFiled: August 3, 2005Date of Patent: July 20, 2010Assignee: BASF AktiengesellschaftInventors: Holger Evers, Michael Jödecke, Johann-Peter Melder, Gunther Van Cauwenberge, Jan Nouwen
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Patent number: 7601875Abstract: Preparation of ethyleneamines by reacting monoethanolamine (MEOA) with ammonia in the presence of a catalyst in a reactor (1) and separating the resulting reaction product, where ethylenediamine (EDA) obtained in the separation is reacted in a separate reactor (2) in the presence of a catalyst to give diethylenetriamine (DETA), and the resulting reaction product is passed to the separation of the reaction product resulting from reactor 1.Type: GrantFiled: July 8, 2004Date of Patent: October 13, 2009Assignee: BASF AktiengesellschaftInventors: Matthias Frauenkron, Holger Evers, Johann-Peter Melder, Roderich Röttger, Markus Siegert, Till Gerlack, Jan Nouwen, Thomas Krug
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Publication number: 20080312439Abstract: The present invention relates to a process for working up triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is introduced into a solvent, subsequently crystallized and separated off from this and the mother liquor formed is extracted with an extractant, wherein the raffinate phase obtained after the extraction stage is worked up further by adsorption in which extractant and/or by-products and intermediates present in the raffinate phase are removed therefrom.Type: ApplicationFiled: December 7, 2006Publication date: December 18, 2008Applicant: BASF AktiengesellschaftInventors: Ortmund Lang, Jurgen Ciprian, Matthias Rauls, Matthias Frauenkron, Gunther van Cauwenberge, Jan Nouwen
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Patent number: 7393978Abstract: Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.Type: GrantFiled: July 15, 2004Date of Patent: July 1, 2008Assignee: BASF AktiengesellschaftInventors: Matthias Frauenkron, Thomas Krug, Holger Evers, Johann-Peter Melder, Roderich Röttger, Markus Siegert, Till Gerlach, Jan Nouwen, Ellen Dahlhoff, Christian Miller
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Publication number: 20070295592Abstract: The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine with a predefined maximum residual content of water. The invention further provides a rapid test of aging for checking the improvement in the color stability.Type: ApplicationFiled: August 3, 2005Publication date: December 27, 2007Applicant: BASF AktiengensellschaftInventors: Holger Evers, Michael Jodecke, Johann-Peter Melder, Gunther van Cauwenberge, Jan Nouwen
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Publication number: 20070100144Abstract: Preparation of ethyleneamines by reacting monoethanolamine (MEOA) with ammonia in the presence of a catalyst in a reactor (1) and separating the resulting reaction product, where ethylenediamine (EDA) obtained in the separation is reacted in a separate reactor (2) in the presence of a catalyst to give diethylenetriamine (DETA), and the resulting reaction product is passed to the separation of the reaction product resulting from reactor 1.Type: ApplicationFiled: July 8, 2004Publication date: May 3, 2007Applicant: BASF AktiengesellschaftInventors: Matthias Frauenkron, Holger Evers, Johann-Peter Melder, Roderich Rottger, Markus Siegert, Till Gerlach, Jan Nouwen, Thomas Krug
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Publication number: 20070043217Abstract: A process for distillatively separating mixtures comprising ethylenamines, wherein the separation is carried out in one or more dividing wall columns and wherein the ethylenamines are in particular ethylenediamine (EDA), piperazine (PIP), diethylenetriamine (DETA), aminoethylethanolamine (AEEA) and/or monoethanolamine (MEOA).Type: ApplicationFiled: October 15, 2004Publication date: February 22, 2007Applicant: BASF AklengesellschaftInventors: Markus Siegert, Johann-Peter Melder, Thomas Krug, Jan Nouwen
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Publication number: 20060276649Abstract: Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.Type: ApplicationFiled: July 15, 2004Publication date: December 7, 2006Applicant: BASF AktiengesellschaftInventors: Matthias Frauenkron, Thomas Krug, Holger Evers, Johann-Peter Melder, Roderich Rottger, Markus Siegert, Till Gerlach, Jan Nouwen, Ellen Dahlhoff, Christian Miller
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Patent number: 6783693Abstract: Hydraulic fluids, in particular brake fluids for motor vehicles, comprising from 0.01 to 50 wt % of one or more cyclic carboxylates, or cyclic carboxamides, which can carry a linear or branched C1-bis C20 alkyl group on the nitrogen atom.Type: GrantFiled: October 18, 2001Date of Patent: August 31, 2004Assignee: BASF AktiengesellschaftInventors: Bayram Aydin, Uwe Fidorra, Arthur Höhn, Ladislaus Meszaros, Jan Nouwen, Knut Oppenländer, Michael Roida, Michael Stösser, Bernd Wenderoth
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Publication number: 20030177690Abstract: Compounds which contain one or more groups of the formula (I)Type: ApplicationFiled: March 5, 2003Publication date: September 25, 2003Inventors: Lars Wittkowski, Jan Nouwen, Hans-Henning Vogel, Ansgar Eisenbeis
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Patent number: 6563004Abstract: Monoisopropylamine is prepared by reacting acetone with ammonia and with hydrogen at elevated temperature and elevated pressure in the presence of a catalyst, wherein the catalytically active mass of the catalyst comprises, after its preparation and before the treatment with hydrogen, from 20 to 90% by weight of aluminum oxide (Al2O3), zirconium dioxide (ZrO2), titanium dioxide (TiO2) and/or silicon dioxide (SiO2), from 1 to 70% by weight of oxygen-containing compounds of copper, calculated as CuO, from 1 to 70% by weight of oxygen-containing compounds of nickel, calculated as NiO, and from 1 to 70% by weight of oxygen-containing compounds of cobalt, calculated as CoO.Type: GrantFiled: December 5, 2000Date of Patent: May 13, 2003Assignee: BASF AktiengesellschaftInventors: Jan Nouwen, Stefan Käshammer, Arthur Höhn, Frank Funke, Johann-Peter Melder, Frank Gutschoven, Philip Buskens
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Patent number: 6525222Abstract: Amines are prepared by reacting aldehydes or ketones at elevated temperature under elevated pressure with nitrogen compounds selected from the group of ammonia, primary and secondary amines, and with hydrogen in the presence of a catalyst, wherein the catalytically active mass of the catalyst contains, after its preparation and before the treatment with hydrogen, 22 to 45% by weight of oxygen-containing compounds of zirconium, calculated as ZrO2, 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, 5 to 50% by weight of oxygen-containing compounds of nickel, calculated as NiO, where the molar ratio of nickel to copper is greater than 1, 5 to 50% by weight of oxygen-containing compounds of cobalt, calculated as CoO, 0 to 5% by weight of oxygen-containing compounds of molybdenum, calculated as MoO3, and 0 to 10% by weight of oxygen-containing compounds of aluminum and/or manganese, calculated as Al2O3 or MnO2.Type: GrantFiled: December 5, 2000Date of Patent: February 25, 2003Assignee: BASF AktiengesellschaftInventors: Jan Nouwen, Arthur Höhn, Horst Neuhauser, Frank Funke, Stephan Andreas Schunk, Johann-Peter Melder, Knut Eger, Michael Hesse, Joachim Wulff-Döring
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Patent number: 6417353Abstract: Amines are prepared by reacting aldehydes or ketones at elevated temperature under elevated pressure with nitrogen compounds selected from the group of ammonia, primary and secondary amines, and with hydrogen in the presence of a catalyst containing copper, wherein the catalytically active mass of the catalyst contains, before the reduction with hydrogen, 20 to 85% by weight of oxygen-containing compounds of zirconium, calculated as ZrO2, 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, 14 to 70% by weight of oxygen-containing compounds of nickel, calculated as NiO, 0 to 5% by weight of oxygen-containing compounds of molybdenum, calculated as MoO3, and 0 to 10% by weight of oxygen-containing compounds of aluminum, calculated as Al2O3.Type: GrantFiled: March 7, 2000Date of Patent: July 9, 2002Assignee: BASF AktiengesellschaftInventors: Frank Funke, Joachim Wulff-Döring, Gerhard Schulz, Wolfgang Siegel, Andreas Kramer, Johann-Peter Melder, Arthur Höhn, Philipp Buskens, Wolfgang Reif, Jan Nouwen
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Patent number: 6403845Abstract: are prepared by single-stage reaction of alkoxydihydropyrans of the formula (II) with water and hydrogen in the presence of a catalyst comprising oxides of nickel, zirconium and copper. In the formulae (I) and (II), R, R′, R″, R′″ can be identical or different and are each hydrogen or a linear or branched saturated hydrocarbon radical having from 1 to 20 carbon atoms in which the hydrocarbon chain may contain O, S and N as heteroatoms and which may be monosubstituted or polysubstituted by hydroxy, thiol or amino groups or halogens.Type: GrantFiled: July 25, 2000Date of Patent: June 11, 2002Inventors: Joachim Pfeffinger, Peter Wahl, Jan Nouwen, Karsten Eller, Arthur Höhn, Jürgen Hunger
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Publication number: 20010003137Abstract: Monoisopropylamine is prepared by reacting acetone with ammonia and with hydrogen at elevated temperature and elevated pressure in the presence of a catalyst, wherein the catalytically active mass of the catalyst comprises, after its preparation and before the treatment with hydrogen,Type: ApplicationFiled: December 5, 2000Publication date: June 7, 2001Inventors: Jan Nouwen, Stefan Kashammer, Arthur Hohn, Frank Funke, Johann-Peter Melder, Frank Gutschoven, Philip Buskens
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Publication number: 20010003136Abstract: Amines are prepared by reacting aldehydes or ketones at elevated temperature under elevated pressure with nitrogen compounds selected from the group of ammonia, primary and secondary amines, and with hydrogen in the presence of a catalyst, wherein the catalytically active mass of the catalyst contains, after its preparation and before the treatment with hydrogen, 22 to 45% by weight of oxygen-containing compounds of zirconium, calculated as ZrO2,Type: ApplicationFiled: December 5, 2000Publication date: June 7, 2001Inventors: Jan Nouwen, Arthur Hohn, Horst Neuhauser, Frank Funke, Stephan Andreas Schunk, Johann-Peter Melder, Knut Eger, Michael Hesse, Joachim Wulff-Doring