Patents by Inventor Bernd Stein
Bernd Stein 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: 8637668Abstract: Process for preparing a cyclic tertiary methylamine of the formula I where A is a C4-alkylene group, a C5-alkylene group or a —(CH2)2—B—(CH2)2— group, where B is oxygen (O) or an N—R1 radical and R1 is C1-C5-alkyl, aryl or C5-C7-cycloalkyl, wherein an amino alcohol II from the group consisting of 1,4-aminobutanol, 1,5-aminopentanol, aminodiglycol (ADG) or aminoethylethanolamine of the formula IIa where R1 is as defined above or is hydrogen (H), in which case R1?CH3 in the amine I, is reacted with methanol in a reactor at a temperature in the range from 150 to 270° C. in the liquid phase in the presence of a copper-comprising heterogeneous catalyst.Type: GrantFiled: June 13, 2011Date of Patent: January 28, 2014Assignee: BASF SEInventors: Christof Wilhelm Wigbers, Johann-Peter Melder, Bernd Stein, Harald Meiβner
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Publication number: 20130331574Abstract: Process for preparing piperazine of the formula I by reacting diethanolamine (DEOA) of the formula II with ammonia (NH3) in the presence of hydrogen and a supported, metal-containing catalyst, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises 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, and 0 to 5% by weight of oxygen-containing compounds of molybdenum, calculated as MoO3, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220° C., using ammonia in a molar ratio to DEOA used of from 5 to 20 and in the presence of 0.2 to 9.0% by weight of hydrogen, based on the total amount of DEOA used and ammonia.Type: ApplicationFiled: June 5, 2013Publication date: December 12, 2013Inventors: Roland Bou Chedid, Johann-Peter Melder, Ulrich Abel, Roman Dostalek, Nina Challand, Bernd Stein, Michael Jodecke
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Publication number: 20130331573Abstract: Process for preparing piperazine of the formula I by reacting diethanolamine (DEOA) of the formula II with ammonia in the presence of hydrogen and a supported, metal-containing catalyst has been found, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and in the range from 0.2 to 5.0% by weight of oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220° C., using ammonia in a molar ratio to DEOA used of from 5 to 25 and in the presence of 0.2 to 9.0% by weight of hydrogen, based on the total amount of DEOA used and ammonia.Type: ApplicationFiled: June 5, 2013Publication date: December 12, 2013Inventors: Roland Bou Chedid, Johann-Peter Melder, Ulrich Abel, Roman Dostalek, Nina Challand, Bernd Stein, Michael Jödecke
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Publication number: 20130324732Abstract: Process for the preparation of a mono-N-alkylpiperazine of the formula I in which R1 is C1- to C5-alkyl or 2-(2-hydroxyethoxy)ethyl, by reacting diethanolamine (DEOA) of the formula II with a primary amine of the formula H2N—R1 (III) in the presence of hydrogen and a supported, metal-containing catalyst, where the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and, in the range from 0.2 to 5.0% by weight, oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 95 to 145 bar.Type: ApplicationFiled: May 31, 2013Publication date: December 5, 2013Inventors: Roland Bou Chedid, Johann-Peter Melder, Ulrich Abel, Roman Dostalek, Bernd Stein
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Publication number: 20130324731Abstract: Process for the preparation of a mono-N-alkylpiperazine of the formula I in which R1 is C1- to C5-alkyl or 2-(2-hydroxyethoxy)ethyl, by reacting diethanolamine (DEOA) of the formula II with a primary amine of the formula H2N—R1 (III) in the presence of hydrogen and a catalyst molding, where the reaction is carried out in the liquid phase at an absolute pressure in the range from 150 to 250 bar and the amination is carried out by means of a catalyst molding, the precursor of which can be prepared according to a process in which (i) an oxidic material comprising copper oxide, aluminum oxide and lanthanum oxide is provided, (ii) pulverulent metallic copper and/or copper flakes and optionally graphite is added to the oxidic material, (iii) the mixture resulting from step ii is shaped to give a molding, where the oxidic material is obtainable by simultaneous or successive precipitation of the component copper oxide, of the component aluminum oxide and of the component lanthanum oxide and subsequent drType: ApplicationFiled: May 31, 2013Publication date: December 5, 2013Inventors: Roland Bou Chedid, Johann-Peter Melder, Ulrich Abel, Roman Dostalek, Bernd Stein
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Publication number: 20130178656Abstract: The present application relates to a process for preparing secondary amines by aminating excess primary or secondary alcohols with primary amines in the liquid phase in the presence of copper-comprising catalysts.Type: ApplicationFiled: January 9, 2013Publication date: July 11, 2013Inventors: Christof Wilhelm Wigbers, Johann-Peter Melder, Bernd Stein
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Patent number: 8466323Abstract: A process for preparing pure triethanolamine (TEOA) by continuously distillatively separating an ethanolamine mixture comprising TEOA and diethanolamine (DEOA), by distilling off DEOA in a distillation column (DEOA column) and supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is <20 minutes.Type: GrantFiled: December 10, 2009Date of Patent: June 18, 2013Assignee: BASF SEInventors: Johann-Peter Melder, Gunther Van Cauwenberge, Tom Fremau, Jürgen Moors, Thilo Hahn, Bernd Stein
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Patent number: 8445726Abstract: The present application relates to a process for preparing unsymmetric secondary tert-butylamines which, as well as the tert-butyl radical, also comprise an alkyl, cycloalkyl or benzyl radical. They are prepared by reacting corresponding aldehydes with tert-butylamine and hydrogen in the presence of hydrogenation catalysts (reductive amination) in the liquid phase.Type: GrantFiled: April 5, 2011Date of Patent: May 21, 2013Assignee: BASF SEInventors: Christof Wilhelm Wigbers, Christoph Mueller, Johann-Peter Melder, Bernd Stein, Harald Meissner, Gerd Haderlein, Norbert Gutfrucht
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Publication number: 20130038115Abstract: An apparatus (1) for producing bristle arrangements for brushes, in particular toothbrushes, having a bristle supply (2) and an apparatus (3) for extracting individual bundles (4) of bristles from the bristle supply (2), and also having a transporting apparatus for transporting the bundles (4) of bristles by way of at least one hollow line (8) by means of a stream of gas or air in perforations in a bundle-retaining plate, is characterized in that the apparatus (3) for extracting the bundles (4) of bristles from the bristle supply (2) has at least one bundle holder (6), and in that the bundle holder(s) (6) of the extraction means (3), the inner contour (10) of the hollow line(s) (8) and the perforations in the bundle-retaining plate are each contoured in a manner corresponding to the bundle contour which is desired in the bristle arrangement.Type: ApplicationFiled: March 18, 2011Publication date: February 14, 2013Applicant: ZAHORANSKY AGInventors: Bernd Stein, Bernhard Rees, Ingo Kumpf, Florian Kiefer
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Publication number: 20120264979Abstract: A process for preparing N,N-dimethylaminoethoxyethanol (DMAEE), wherein a) dimethylamine and ethylene oxide are reacted, b) the resulting product mixture of N,N-dimethylethanolamine and DMAEE is separated by distillation to obtain a DMAEE-containing fraction as the bottom stream, and c) DMAEE from the fraction obtained in (b) is removed by distillation.Type: ApplicationFiled: March 15, 2012Publication date: October 18, 2012Applicant: BASF SEInventors: Frank-Friedrich Pape, Alfred Krause, Johann-Peter Melder, Bernd Stein, Joachim-Thierry Anders, Frank Haese
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Publication number: 20120245389Abstract: The present invention relates to a process for hydrogenating organic nitriles by means of hydrogen in the presence of a catalyst in a reactor, where the shaped body catalyst is arranged in a fixed bed, wherein the shaped body in the shape of spheres or rods has in each case a diameter 3 mm or less, in the shape of tablets a height of 4 mm or less, and in the case of all other geometries in each case has an equivalent diameter L=1/a? of 0.70 mm or less, where a? is the external surface area per unit volume (mms2/mmp3), where: a ? = A p V p , where Ap is the external surface area of the catalyst particle (mms2) and Vp is the volume of the catalyst particle (mmp3). The present invention further relates to a process for preparing downstream products of isophoronediamine (IPDA) or N,N-dimethylaminopropylamine (DMAPA) from amines prepared according to the invention.Type: ApplicationFiled: March 22, 2012Publication date: September 27, 2012Applicant: BASF SEInventors: Christof Wilhelm Wigbers, Christoph Müller, Wolfgang Mägerlein, Martin Ernst, Thomas Heidemann, Johann-Peter Melder, Lucia Königsmann, Milind Joshi, Oliver Bey, Bernd Stein
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Publication number: 20120157679Abstract: Process for preparing a cyclic tertiary methylamine of the formula I where A is a C4-alkylene group, a C5-alkylene group or a —(CH2)2—B—(CH2)2—group, where B is oxygen (O) or an N—R1 radical and R1 is C1-C5-alkyl, aryl or C5-C7-cycloalkyl, wherein an amino alcohol II from the group consisting of 1,4-aminobutanol, 1,5-aminopentanol, aminodiglycol (ADG) or aminoethylethanolamine of the formula IIa where R1 is as defined above or is hydrogen (H), in which case R1?CH3 in the amine I, is reacted with methanol in a reactor at a temperature in the range from 150 to 270° C. in the liquid phase in the presence of a copper-comprising heterogeneous catalyst.Type: ApplicationFiled: June 13, 2011Publication date: June 21, 2012Applicant: BASF SEInventors: CHRISTOF WILHELM WIGBERS, Johann-Peter Melder, Bernd Stein, Harald Meißner
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Publication number: 20120095221Abstract: A process for preparing a cyclic tertiary amine of the formula I where A is a C4-alkylene group, a C5-alkylene group or a —(CH2)2—B—(CH2)2— group, where B is oxygen (O) or an N—R1 radical and R1 is C1-C5-alkyl, aryl or C5-C7-cycloalkyl, and the radical R2 is a linear or branched C2-C16-alkyl, C5-C7-cycloalkyl or C7-C20-aralkyl, in which (i) an amino alcohol II from the group consisting of 1,4-aminobutanol, 1,5-aminopentanol, aminodiglycol (ADG) and aminoethylethanolamine of the formula IIa where R1 is as defined above or hydrogen (H), in which case R1?R2 in the amine I, is reacted with a primary or secondary alcohol R2OH (III) at a temperature in the range from 150 to 270° C. in the liquid phase in the presence of a copper-comprising heterogeneous catalyst in a reactor.Type: ApplicationFiled: October 14, 2011Publication date: April 19, 2012Applicant: BASF SEInventors: Christof Wilhelm Wigbers, Johann-Peter Melder, Bernd Stein, Harald Meißner
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Publication number: 20110257437Abstract: A process for preparing pure triethanolamine (TEOA) by continuously distillatively separating an ethanolamine mixture comprising TEOA and diethanolamine (DEOA), by distilling off DEOA in a distillation column (DEOA column) and supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is <20 minutes.Type: ApplicationFiled: December 10, 2009Publication date: October 20, 2011Applicant: BASF SEInventors: Johann-Peter Melder, Gunther Van Cauwenberge, Tom Fremau, Jürgen Moors, Thilo Hahn, Bernd Stein
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Publication number: 20110251433Abstract: The present application relates to a process for preparing unsymmetric secondary tert-butylamines which, as well as the tert-butyl radical, also comprise an alkyl, cycloalkyl or benzyl radical. They are prepared by reacting corresponding aldehydes with tert-butylamine and hydrogen in the presence of hydrogenation catalysts (reductive amination) in the liquid phase.Type: ApplicationFiled: April 5, 2011Publication date: October 13, 2011Applicant: BASF SEInventors: Christof Wilhelm WIGBERS, Christoph Müller, Johann-Peter Melder, Bernd Stein, Harald Meißner, Gerd Haderlein, Norbert Gutfrucht
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Patent number: 8017808Abstract: A process for preparing an amine by reacting an aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group of primary and secondary amines in the presence of a heterogeneous catalyst, wherein the catalyst is a coated catalyst which comprises at least one metal of group VIII of the Periodic Table of the Elements as a hydrogenating metal and additionally a promoter on an oxidic support, at least 80% of the metal of group VIII of the Periodic Table of the Elements being present in a layer between the surface of the catalyst and a penetration depth which is not more than 80% of the radius of the catalyst, calculated from the surface of the catalyst.Type: GrantFiled: March 13, 2007Date of Patent: September 13, 2011Assignee: BASF SEInventors: Jan Eberhardt, Bram Willem Hoffer, Frank Haese, Johann-Peter Melder, Bernd Stein, Michael Stang, Thomas Hill, Ekkehard Schwab
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Publication number: 20110184210Abstract: In the continuous process for preparing alkylamines by reacting C1-4-alkanols with ammonia in the gas phase in the presence of a shape-selective fixed-bed catalyst in a cooled reactor, the shape-selective fixed-bed catalyst is present in a single contiguous fixed bed in the reactor and tubes through which coolants are passed run within the fixed bed to regulate the temperature of the fixed bed.Type: ApplicationFiled: April 7, 2011Publication date: July 28, 2011Applicant: BASF SEInventors: Marco Bosch, Roderich Röttger, Bernd Stein, Thomas Krug, Johann-Peter Melder, Theodor Weber
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Publication number: 20110172430Abstract: Process for the continuous preparation of an amine by reaction of a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia, primary and secondary amines at a temperature in the range from 60 to 300° C. in the presence of a catalyst comprising copper oxide and aluminum oxide, wherein the reaction takes place in the gas phase and the catalytically active composition of the catalyst before reduction with hydrogen comprises PS from 20 to 75% by weight of aluminum oxide (Al2O3), from 20 to 75% by weight of oxygen-comprising compounds of copper, calculated as CuO, from 0 to 2% by weight of oxygen-comprising compounds of sodium, calculated as Na2O, and less than 5% by weight of oxygen-comprising compounds of nickel, calculated as NiO, and the shaped catalyst body has a pellet shape having a diameter in the range from 1 to 4 mm and a height in the range from 1 to 4 mm.Type: ApplicationFiled: September 9, 2009Publication date: July 14, 2011Inventors: Martin Ernst, Bernd Stein, Steffen Maas, Jörg Pastre, Thorsten Johann, Johann-Peter Melder
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Patent number: 7951974Abstract: In the continuous process for preparing alkylamines by reacting C1-4-alkanols with ammonia in the gas phase in the presence of a shape-selective fixed-bed catalyst in a cooled reactor, the shape-selective fixed-bed catalyst is present in a single contiguous fixed bed in the reactor and tubes through which coolants are passed run within the fixed bed to regulate the temperature of the fixed bed.Type: GrantFiled: April 30, 2010Date of Patent: May 31, 2011Assignee: BASF AktiengesellschaftInventors: Marco Bosch, Roderich Röttger, Bernd Stein, Thomas Krug, Johann-Peter Melder, Theodor Weber
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Publication number: 20100210877Abstract: In the continuous process for preparing alkylamines by reacting C1-4-alkanols with ammonia in the gas phase in the presence of a shape-selective fixed-bed catalyst in a cooled reactor, the shape-selective fixed-bed catalyst is present in a single contiguous fixed bed in the reactor and tubes through which coolants are passed run within the fixed bed to regulate the temperature of the fixed bed.Type: ApplicationFiled: April 30, 2010Publication date: August 19, 2010Applicant: BASF AktiengesellschaftInventors: Marco Bosch, Roderich Röttger, Bernd Stein, Thomas Krug, Johann-Peter Melder, Theodor Weber