Patents by Inventor Frank Ohlbach
Frank Ohlbach 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: 7147757Abstract: The invention relates to a method for separating by distillation a portion or the entirety of an azeptine derivative (III), which is selected from the group consisting of aminohexylidene imine, tetrahydroazepine, hexylhexahydroazepine and of aminohexylhexahydroazepine, out of a mixture (II) containing an azepine derivative (III) and an amine (I). The inventive method is characterized in that the distillation is carried out with a maximum bottom temperature of 150° C.Type: GrantFiled: March 6, 2001Date of Patent: December 12, 2006Assignee: Basf AktiengesellschaftInventors: Hermann Luyken, Frank Ohlbach
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Patent number: 7091153Abstract: A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises (a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group consisting of aluminum, silicon, zirconium, titanium and vanadium, (c) from 0 to 0.3% by weight based on (a) of a compound based on an alkali and/or alkaline earth metal, and also (d) from 0.001 to 1% by weight based on (a) of manganese.Type: GrantFiled: February 12, 2004Date of Patent: August 15, 2006Assignee: BASF AktiengesellschaftInventors: Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken, Martin Merger, Frank Ohlbach, Alwin Rehfinger
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Patent number: 6972075Abstract: The invention relates to a method for removing, by distillation, 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine, by a) removing the hexamethylenediamine from the mixture while obtaining a mixture (I) that has a hexamethylenediamine content of less than 1 wt. -%, b) removing completely or partially the 6-aminocapronitrile from mixture (I) while obtaining a mixture (II) whose content in substances that have a higher boiling point as 6-aminocapronitrile under distillation conditions and that cannot be formed by dimerization reactions when 6-aminocapronitrile is thermally treated is less than 1 wt. -%, and c) completely or partially removing from mixture (II) the hexamethylenediamine that might be present while obtaining a mixture (IV) whose hexamethylenediamine content is higher than that of mixture (II), and a mixture (V) whose hexamethylenediamine content is lower than that of mixture (II).Type: GrantFiled: June 13, 2001Date of Patent: December 6, 2005Assignee: BASF AktiengesellschaftInventors: Hermann Luyken, Frank Ohlbach, Rolf-Hartmuth Fischer, Johann-Peter Melder, Peter Bassler, Andreas Ansmann, Günther Achhammer
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Patent number: 6905997Abstract: A process is provided for the regeneration of a heterogeneous catalyst used for the preparation of compounds containing NH2 groups by the hydrogenation, with hydrogen, of compounds containing at least one unsaturated carbon-nitrogen bond, wherein a) the feed of the compound to be hydrogenated is stopped and b) the heterogeneous catalyst is treated with a compound of the formula R1R2N—CO—R3??(I), in which R1 is hydrogen or C1-C4 alkyl and R2, R3 independently of one another are each hydrogen or C1-C4 alkyl or together are a C3-C6 alkylene group, or mixtures of such compounds, at a pressure ranging from 0.1 to 30 MPa and a temperature ranging from 100 to 300° C., with the proviso that the compound of formula (I) is in liquid form during the treatment.Type: GrantFiled: September 20, 2001Date of Patent: June 14, 2005Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Hermann Luyken, Andreas Ansmann, Rolf-Hartmuth Fischer, Johann-Peter Melder, Peter Bassler
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Patent number: 6896772Abstract: A process for distillative removal of ammonia from solutions (I) which include a lactam and ammonia comprises effecting said removal in a distillation apparatus (a) at an absolute pressure of less than 10 bar.Type: GrantFiled: June 2, 2001Date of Patent: May 24, 2005Assignee: BASF AktiengesellschaftInventors: Hermann Luyken, Frank Ohlbach, Stefan Maixner, Rolf-Hartmuth Fischer, Johann-Peter Melder, Peter Bassler, Andreas Ansmann
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Patent number: 6878798Abstract: A process for preparing a polymer, which comprises a) reacting a mixture (I) containing 6-aminocapronitrile and water in the presence of a catalyst to obtain a mixture (II) containing caprolactam, ammonia, water, high boilers and low boilers, then b) removing ammonia from mixture (II) to obtain a mixture (III) containing caprolactam, water, high boilers and low boilers, then c) removing all or some of the water from mixture (III) to obtain a mixture (IV) containing caprolactam, high boilers and low boilers and then d) feeding mixture (IV) to a polymerization reaction, and also the polymer obtainable by this process, the use of the polymer for producing fibers, sheetlike structures and moldings, and also fibers, sheetlike structures and moldings obtainable using such a polymer.Type: GrantFiled: April 30, 2001Date of Patent: April 12, 2005Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Helmut Winterling, Andreas Ansmann, Rolf-Hartmuth Fischer, Johann-Peter Melder, Stefan Maixner, Peter Bassler, Hermann Luyken
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Patent number: 6852669Abstract: A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises (a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group consisting of aluminum, silicon, zirconium, titanium and vanadium, (c) from 0 to 0.3% by weight based on (a) of a compound based on an alkali and/or alkaline earth metal, and also (d) from 0.001 to 1% by weight based on (a) of manganese.Type: GrantFiled: May 8, 2001Date of Patent: February 8, 2005Assignee: BASF AktiengesellschaftInventors: Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken, Martin Merger, Frank Ohlbach, Alwin Rehfinger
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Patent number: 6828457Abstract: A process is provided for reducing the content of a monounsaturated aliphatic amine (III) in a mixture (IV) containing an aminonitrile (I) or a diamine (II), or mixtures thereof, and the amine (III), wherein a) the mixture (IV) is reacted with an anionic nucleophile (V), which contains a nucleophilic atom selected from the group comprising oxygen, nitrogen and sulfur, which is capable of taking up an H+ ion to form an acid with a pKa ranging from 7 to 11, measured in water at 25° C., and which has a relative nucleophilicity, measured in methyl perchlorate/methanol at 25° C., ranging from 3.4 to 4.7 when oxygen is the nucleophilic atom, ranging from 4.5 to 5.8 when nitrogen is the nucleophilic atom, and ranging from 5.5 to 6.8 when sulfur is the nucleophilic atom, in an amount ranging from 0.Type: GrantFiled: May 21, 2003Date of Patent: December 7, 2004Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Christoph Benisch, Hermann Luyken, Andreas Ansmann, Rolf-Hartmuth Fischer, Johann-Peter Melder, Peter Bassler, Stefan Maixner
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Patent number: 6815388Abstract: Passivated iron useful as catalytically active component after activation is activated by hydrogen at elevated temperature and elevated pressure in the presence of a nitrile.Type: GrantFiled: March 19, 2002Date of Patent: November 9, 2004Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Rolf Fischer, Hermann Luyken, Johann-Peter Melder, Martin Merger, Andreas Ansmann, Peter Bassler
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Publication number: 20040181095Abstract: A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprisesType: ApplicationFiled: February 12, 2004Publication date: September 16, 2004Inventors: Guido Voit, Rolf Fischer, Peter Babetaler, Andreas Ansmann, Hermann Luyken, Martin Merger, Frank Ohlbach, Alwin Rehfinger
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Patent number: 6790995Abstract: Mixtures of primary amines of the formula (I) X—CH2—NH2 (I) and secondary amines of the formula (II) (X—CH2—)2NH (II) where X is C1-20-alkyl, C2-20-alkenyl or C3-8-cycloalkyl which may be unsubstituted or substituted by C1-20-alkyl, C3-8-cycloalkyl, C4-20-alkylcycloalkyl, C4-20-cycloalkylalkyl, C2-20-alkoxyalkyl, C6-14-aryl, C7-20-alkylaryl, C7-20-aralkyl, C1-20-alkoxy, hydroxy, C1-20-hydroxyalkyl, amino, C1-20-alkylamino, C2-20-dialkylamino, C2-12-alkenylamino. C3-8-cycloalkylamino, arylamino, diarylamino, aryl-C1-8-alkylamino, halogen, mercapto, C2-20-alkenyloxy, C3-8-cycloalkoxy, aryloxy and/or C2-8-alkoxycarbonyl are prepared by reacting nitriles of the formula (III) X—CN (III) with hydrogen at from 50 to 250° C. and pressures of from 5 to 350 bar in the presence of a Pd-containing catalyst comprising, based on the total weight of the catalyst, from 0.1 to 10% by weight of Pd on a support.Type: GrantFiled: January 3, 2002Date of Patent: September 14, 2004Assignee: BASF AktiengesellschaftInventors: Joachim Pfeffinger, Michael Hüllmann, Arthur Höhn, Frank Funke, Frank Ohlbach, Till Gerlach
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Patent number: 6699960Abstract: A polyamide is prepared by reacting at least one dinitrile and at least one diamine with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 50*106 Pa in a molar ratio of at least 1:1 for water to the sum total of dinitrile and diamine in the presence of a heterogeneous catalyst selected from the group consisting of aluminum oxide, tin oxide, silicon oxide, oxides of the second to sixth transition group of the periodic table, oxides of the lanthanides and actinides, sheet-silicates and zeolites.Type: GrantFiled: January 29, 2002Date of Patent: March 2, 2004Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Hermann Luyken
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Publication number: 20040030174Abstract: A process is provided for reducing the content of a monounsaturated aliphatic amine (III) in a mixture (IV) containing an aminonitrile (I) or a diamine (II), or mixtures thereof, and the amine (III), whereinType: ApplicationFiled: May 21, 2003Publication date: February 12, 2004Inventors: Frank Ohlbach, Christoph Benisch, Hermann Luyken, Andreas Ansmann, Rolf-Hartmuth Fischer, Johann-Peter Melder, Peter Bassler, Stefan Maixner
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Patent number: 6686465Abstract: A process is provided for the preparation of cyclic lactams of formula (II): in which n and m can each have the values 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n+m is at least 3, preferably at least 4, and R1 and R2 are C1-C6-alkyl, C5-C7-cycloalkyl or C6-C12-aryl groups, by reacting a compound (I) of the formula in which R1, R2, m and n are as defined above and R are [sic] nitrile, carboxamide and carboxylic acid groups, with steam in the gas phase.Type: GrantFiled: October 29, 2002Date of Patent: February 3, 2004Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf-Hartmuth Fischer, Hermann Luyken, Stefan Maixner, Johann-Peter Melder
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Patent number: 6683178Abstract: The invention relates to a method for producing cyclic lactams of formula (II) by reacting a compound (I) of formula (I) with water in the presence of an organic, liquid dilution agent in the liquid phase. In formula (II), n and m respectively can have the values 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n+m is at least 3, preferably at least 4 and R1 and R2 represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups. In formula (I), R1, R2, m and n are defined as above and R represents nitrile, carboxylic acid amide and carboxylic acid groups. The inventive method is characterized in that a) compound (I) is reacted with water in the liquid phase in the presence of an organic, liquid dilution agent (III) to form a mixture (IV) containing a lactam (II) and said mixture (IV) is subjected to an aqueous treatment to obtain a two-phase system.Type: GrantFiled: October 17, 2002Date of Patent: January 27, 2004Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf-Hartmuth Fischer, Hermann Luyken, Stefan Maixner, Johann-Peter Melder
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Patent number: 6683179Abstract: A process for the preparation of caprolactam is provided, wherein a) a mixture (I) containing 6-aminocapronitrile and water is reacted in the gas phase, in the presence of a catalyst, to give a mixture (II) containing caprolactam, ammonia, water, high-boiling components and low-boiling components, b) ammonia is then removed from the mixture (II) to give a mixture (III) containing caprolactam, water, high-boiling components and low-boiling components, c) water is then removed from the mixture (III) to give a mixture (IV) containing caprolactam, high-boiling components and low-boiling components, and d) a solid (V) containing caprolactam is then obtained from the mixture (IV) by crystallization, the proportion by weight of caprolactam in the solid (V) being greater than in the mixture (IV).Type: GrantFiled: October 29, 2002Date of Patent: January 27, 2004Assignee: BASF AktiengesellschaftInventors: Peter Bassler, Dieter Baumann, Rolf-Hartmuth Fischer, Eberhard Fuchs, Johann-Peter Melder, Frank Ohlbach
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Patent number: 6683180Abstract: A process is provided for the preparation of caprolactam from a compound of formula (I): NC—(CH2)5—CO—R (I) in which R is a carboxamide, carboxylic acid or carboxylic acid ester group, wherein a) a compound (I) or a mixture of such compounds, in the presence of ammonia and optionally a liquid diluent (VI), is hydrogenated with hydrogen in the presence of a catalyst (II) to give a mixture (III), b) the hydrogen and the catalyst (II) are separated from the mixture (III) to give a mixture (IV), and c) the mixture (IV), optionally in the presence of a liquid diluent (VII), is converted to caprolactam in the presence of a catalyst (V).Type: GrantFiled: December 4, 2002Date of Patent: January 27, 2004Assignee: BASF AktiengesellschaftInventors: Frank Ohlbach, Andreas Ansmann, Rolf-Hartmuth Fischer, Johann-Peter Melder
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Publication number: 20040015004Abstract: The invention relates to a method for removing, by distillation, 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine, by a) removing the hexamethylenediamine from the mixture while obtaining a mixture (I) that has a hexamethylenediamine content of less than 1 wt.-%, b) removing completely or partially the 6-aminocapronitrile from mixture (I) while obtaining a mixture (II) whose content in substances that have a higher boiling point as 6-aminocapronitrile under distillation conditions and that cannot be formed by dimerization reactions when 6-aminocapronitrile is thermally treated is less than 1 wt.-%, and c) completely or partially removing from mixture (II) the hexamethylenediamine that might be present while obtaining a mixture (IV) whose hexamethylenediamine content is higher than that of mixture (II), and a mixture (V) whose hexamethylenediamine content is lower than that of mixture (II).Type: ApplicationFiled: December 16, 2002Publication date: January 22, 2004Inventors: Hermann Luyken, Frank Ohlbach, Rolf-Hartmuth Fischer, Johann-Peter Melder, Peter Bassler, Andreas Ansmann, Gunther Achhammer
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Patent number: 6677486Abstract: Nitriles are hydrogenated to primary amines over an activated, alpha-Al2O3-containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, which is obtainable by a process comprising the steps in the order (a)-(f): (a) preparing a kneadable composition comprising the alloy, a shaping aid, water and a pore former; (b) shaping the kneadable composition to form a shaped body; (c) calcining the shaped body; (d) activating the calcined shaped body by treatment with aqueous alkali metal hydroxide solution; (e) rinsing the shaped catalyst body with aqueous alkali metal hydroxide solution; (f) rinsing the shaped catalyst body with water.Type: GrantFiled: November 7, 2001Date of Patent: January 13, 2004Assignee: BASF AktiengesellschaftInventors: Andreas Ansmann, Christoph Benisch, Frank Funke, Frank Ohlbach, Martin Merger
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Patent number: 6677449Abstract: A process for the preparation of caprolactam is provided, wherein a) a mixture (I) containing 6-aminocapronitrile and water is reacted in the liquid phase, in the presence of a catalyst, to give a mixture (II) containing caprolactam, ammonia, water, high-boiling components and low-boiling components, b) ammonia is then removed from the mixture (II) to give a mixture (III) containing caprolactam, water, high-boiling components and low-boiling components, c) water is then removed from the mixture (III) to give a mixture (IV) containing caprolactam, high-boiling components and low-boiling components, and d) a solid (V) containing caprolactam is then obtained from the mixture (IV) by crystallization, the proportion by weight of caprolactam in the solid (V) being greater than in the mixture (IV).Type: GrantFiled: October 29, 2002Date of Patent: January 13, 2004Assignee: BASF AktiengesellschaftInventors: Peter Bassler, Dieter Baumann, Rolf-Hartmuth Fischer, Eberhard Fuchs, Johann-Peter Melder, Frank Ohlbach