Patents by Inventor Wolfgang Kiel
Wolfgang Kiel 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: 6429335Abstract: The present invention relates to a process for preparing amines of formula (I) R1—CH2—NH2 (I), wherein R1 represents optionally branched C1-C12-alkyl, C3-C8-cycloalkyl, C6-C12-aryl or C6-C12-aryl substituted with halogen-and/or C1-C12-alkyl, C7-C10-aralkyl or C7-C10-aralkyl substituted on the aryl radical by halogen and/or C1-C12-alkyl, or an aldose residue of the formula CiH2i+1Oi in which i is 2 to 5 and wherein one hydrogen of the aldose residue is optionally replaced by a saccharide residue, by catalytically hydrogenating aldehydes of formula (II) R1—CHO (II), wherein R1 has the meaning indicated for formula (I), in the presence of ammonia, a hydrogenation catalyst, and disodium tetraborate.Type: GrantFiled: December 12, 2001Date of Patent: August 6, 2002Assignee: Bayer AktiengesellschaftInventor: Wolfgang Kiel
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Patent number: 6399810Abstract: Methyl cyclohexyl-propionate is prepared by the hydrogenation of methyl cinnamate in the presence of a ruthenium and/or palladium catalyst.Type: GrantFiled: August 15, 2000Date of Patent: June 4, 2002Assignee: Haarmann & Reimer GmbHInventors: Walter Kuhn, Hans-Ulrich Funk, Gerhard Senft, Wolfgang Kiel
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Patent number: 6268501Abstract: Hydroxyethylcyclohexanes which can optionally contain a nitrogen atom in the cyclohexane ring are obtained in a particularly selective manner by catalytic hydrogenation of the corresponding hydroxyethylbenzene or hydroxyethylpyridines when ruthenium which has been treated before use with a reducing agent is used as catalyst.Type: GrantFiled: November 17, 1999Date of Patent: July 31, 2001Assignee: Bayer AktiengesellschaftInventor: Wolfgang Kiel
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Patent number: 6077974Abstract: Amino-halogenophenyl alkyl thioethers prepared in an advantageous manner by catalytic reduction of the corresponding nitro compound by the nitro compound being continuously hydrogenated with hydrogen in the presence of a supported noble-metal catalyst.Type: GrantFiled: July 21, 1999Date of Patent: June 20, 2000Assignee: Bayer AktiengesellschaftInventor: Wolfgang Kiel
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Patent number: 6046365Abstract: Unsubstituted or substituted cyclohexanones are advantageously prepared by hydrogenation of the corresponding phenols in the presence of a palladium-on-carbon catalyst at from 100 to 250.degree. C. and from 1 to 20 bar of hydrogen pressure if the catalyst is mixed with a base component and from 20 to 200% by weight of water (based on the base component) and this mixture is used in the hydrogenation. For identical batches, this gives virtually identical hydrogenation times and virtually equally good yields of cyclohexanones.Type: GrantFiled: June 29, 1998Date of Patent: April 4, 2000Assignee: Bayer AktiengesellschaftInventor: Wolfgang Kiel
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Patent number: 6015927Abstract: Substituted or unsubstituted cyclohexanones are advantageously prepared by hydrogenation of the corresponding phenols in the presence of a palladium-on-carbon catalyst at from 100 to 250.degree. C. and from 1 to 20 bar of hydrogen pressure if the reaction is carried out in the presence of straight-chain, branched or cyclic alkanes having a boiling point at atmospheric pressure of over 70.degree. C. as solvents. This makes it possible to obtain substituted or unsubstituted cyclohexanones in short hydrogenation times and in high yields using low-toxicity, physically problem-free solvents which are easy to handle from a safety point of view.Type: GrantFiled: June 29, 1998Date of Patent: January 18, 2000Assignee: Bayer AktiengesellschaftInventor: Wolfgang Kiel
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Patent number: 5977362Abstract: Quinazoline-2,4-diones are obtained in high yields and purities by reacting anthranilic acids with isocyanates and then, without isolation of the urea formed as intermediate, treating the reaction mixture with acid.Type: GrantFiled: May 26, 1998Date of Patent: November 2, 1999Assignee: Bayer AktiengesellschaftInventors: Nikolaus Muller, Klaus-Christian Paetz, Wolfgang Kiel
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Patent number: 5886232Abstract: Substituted cyclohexanones of the formula ##STR1## where R.sup.1 to R.sup.5 are as defined in the description, can be obtained by catalytic hydrogenation of phenols of the formula ##STR2## where R.sup.1 to R.sup.5 are as defined in the description.The reaction is carried out at from 20.degree. to 250.degree. C., from 1 to 200 bar and in an ether as solvent. If desired, an alkaline alkali metal, alkaline earth metal or ammonium compound is used as additive.Type: GrantFiled: February 29, 1996Date of Patent: March 23, 1999Assignee: Bayer AktiengesellschaftInventors: Heinz Landscheidt, Alexander Klausener, Eberhard Zirngiebl, Wolfgang Kiel
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Patent number: 5872300Abstract: 2-Amino-6-chlorophenyl-alkylsulfanes are prepared in a particularly advantageous manner by hydrogenating 2-chloro-6-nitrophenyl-alkylsulfanes catalytically in the presence of a solvent without the addition of a further sulfur compound, and the novel compound 2-amino-6-chlorophenyl-isopropylsulfane is provided.Type: GrantFiled: November 14, 1996Date of Patent: February 16, 1999Assignee: Bayer AktiengesellschaftInventors: Ferdinand Hagedorn, Wolfgang Kiel, Helmut Fiege
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Patent number: 5663443Abstract: Novel ruthenium catalysts additionally contain carbonates, hydroxides and/or hydrated oxides of cerium and manganese or of manganese and/or dehydration products thereof. They can optionally be present on a support material and can be prepared by converting soluble compounds of ruthenium, cerium and manganese by treatment with alkaline compounds into insoluble compounds and optionally further treating these. Such catalysts are particularly suitable for the preparation of cycloaliphatic polyamines by hydrogenation of corresponding aromatic amines.Type: GrantFiled: February 3, 1995Date of Patent: September 2, 1997Assignee: Bayer AktiengesellschaftInventors: Wolfgang Kiel, Eberhard Zirngiebl, Joerg-Dietrich Jentsch
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Patent number: 5623045Abstract: A process for the preparation of coatings using a coating composition having a binder containing a two-component system of a) a polyisocyanate component and b) an isocyanate-reactive component b) which is essentially free from hydroxyl groups and contains b1) 5 to 95 parts by weight of a polyamine containing ester groups and secondary amino groups and b2) 5 to 95 parts by weight of polyketimines.Type: GrantFiled: April 27, 1995Date of Patent: April 22, 1997Assignee: Bayer AktiengesellschaftInventors: Christian Zwiener, Reinhard Halpaap, Josef Pedain, Wolfgang Kiel
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Patent number: 5253528Abstract: Nondestructive testing of heat exchangers (12), such as a radiator, measures the percentage of good bonds between air centers and cooling tubes based on natural or resonant frequencies of the exchanger (12). The exchanger (12) is excited by an audio speaker (38) and measured for a first natural frequency in the center thereof by an accelerometer (44). The natural frequency is indicative of the percentage of good bonds in the center portion of the exchanger (12) based on the stiffness thereof. The audio speaker (38) is moved to an antinode of a higher frequency mode to measure a second natural frequency indicating the percentage of bonds at the edges and corners thereof. The resonant frequencies are compared to standards to determine the actual percentage of good bonds.Type: GrantFiled: June 17, 1991Date of Patent: October 19, 1993Assignee: General Motors CorporationInventors: John H. Varterasian, Francis H. Chen, Wolfgang Kiel, Kent E. Brittin, Patrick D. Quinn, Kenneth J. Zielesch, Kurt A. Tesnow, Thomas H. Worswick
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Patent number: 5101075Abstract: Bis- and tris-(3-dimethylaminopropyl)-amine can be prepared by catalytic hydrogenation of 3-(dimethylamino)-propionitrile with a palladium catalyst on an Al.sub.2 O.sub.3 -containing support.Type: GrantFiled: October 2, 1990Date of Patent: March 31, 1992Assignee: Bayer AktiengesellschaftInventors: Josef Kasbauer, Helmut Fiege, Wolfgang Kiel
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Patent number: 5011996Abstract: Reaction products of oxo compounds and amines or ammonia, in which at least one substituent is aromatic and monosubstituted to trisubstituted by halogen, can be catalytically hydrogenated to the respective amines, the halogen essentially being completely retained if an Ni-containing or Co-containing catalyst is employed and the reaction is carried out in the presence of organic sulphur compounds.Type: GrantFiled: July 5, 1989Date of Patent: April 30, 1991Assignee: Bayer AktiengesellschaftInventors: Wolfgang Kiel, Heinz Ziemann
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Patent number: 4940819Abstract: The catalytic hydrogenation of .alpha.,.beta.-unsaturated ketones of the formulaR.sup.1 --CH.dbd.CH--CO--R.sup.2,in whichR.sup.1 and R.sup.2 independently of one another represent straight-chain or branched alkyl, hydroxy-alkyl, alkenyl, cycloalkyl, cycloalkenyl, aralkyl or aryl, where at least one of the radicals R.sup.1 and R.sup.2 is monosubstituted to trisubstituted by halogen,can be carried out on a Ni-containing catalyst and in the presence of an organic sulphur compound of the formulaR.sup.3 --S(.dbd.O).sub.n --R.sup.4in whichR.sup.3 and R.sup.4 independently of one another denote straight-chain or branched alkyl, hydroxy-alkyl, carboxyalkyl or phenyl, and furthermoreR.sup.3 and R.sup.4 may together represent --CH.dbd.CH--CH.dbd.CH--, --(CH.sub.2).sub.4 --, --(CH.sub.2).sub.5 --, --(CH.sub.2).sub.2 --S--(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --,R.sup.4 may additionally denote hydrogen or CO--C.sub.1 -C.sub.12 -alkyl and n assumes the value 0 or 1.Type: GrantFiled: July 5, 1989Date of Patent: July 10, 1990Assignee: Bayer AktiengesellschaftInventors: Wolfgang Kiel, Heinz Ziemann
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Patent number: 4193937Abstract: Analines, meta-substituted by chlorine are prepared by reacting chloro-anilines having the formula ##STR1## wherein X.sup.1 and X.sup.2 are the same or different and represent chlorine, hydrogen or optionally substituted alkyl, aryl, aralkyl, alkoxy or aralkoxy, with one of the radicals X.sup.1 or X.sup.2 representing chlorine when 3-chloroanilines are being prepared andX.sup.1 and X.sup.2 representing chlorine when 3,5-dichloroanilines are being prepared andR.sup.1, R.sup.2 and R.sup.3 are the same or different and represent chlorine, hydrogen or optionally substituted alkyl, aryl, aralkyl, alkoxy or aralkoxy, with at least one of the radicals R.sup.1, R.sup.2 or R.sup.3 representing chlorinewith hydrogen in solution in a neutral or acid medium in the presence of noble metals which are in the elementary form or in the form of compounds and are optionally applied to supports, and in the presence of sulfur or sulfur compounds at elevated temperatures and under pressure.Type: GrantFiled: September 15, 1978Date of Patent: March 18, 1980Assignee: Bayer AktiengesellschaftInventors: Karlfried Wedemeyer, Wolfgang Kiel, Werner Evertz
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Patent number: 4085141Abstract: A method of preparing a meta-chloroaniline by contacting a substituted aniline containing a chlorine substituent at other than a meta position and a chlorine substituent at the meta position with hydrogen in solution in an acid medium in the presence of a noble metal catalyst at elevated temperature and pressure. The aniline reactant can contain organo substituents on the ring. The product which results is either a 3-chloroaniline or a 3,5-dichloroaniline which similarly can contain organo substituents on the ring.Type: GrantFiled: January 9, 1976Date of Patent: April 18, 1978Assignee: Bayer AktiengesellschaftInventors: Karlfried Wedemeyer, Wolfgang Kiel, Werner Evertz
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Patent number: 4060562Abstract: Phenols, meta-substituted by halogen are prepared by reacting halogenophenols of the formula ##STR1## wherein X.sup.1 and X.sup.2 are identical or different and represent halogen, hydrogen or optionally substituted aryl or aralkyl, with at least one of the radicals X.sup.1 orX.sup.2 representing halogen, andR.sup.1, r.sup.2 and R.sup.3 are identical or different and represent hydrogen or optionally monosubstituted or polysubstituted aryl or aralkyl or chlorine, bromine or iodine, with at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 representing chlorine, bromine or iodine,With hydrogen under pressure at elevated temperature in the presence of elemental sulfur, or compounds thereof optionally in the presence of active charcoal and/or iron salts.Type: GrantFiled: August 29, 1975Date of Patent: November 29, 1977Assignee: Bayer AktiengesellschaftInventors: Karlfried Wedemeyer, Wolfgang Kiel, Werner Evertz
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Patent number: 4059627Abstract: An improvement in a process for the preparation of chlorinated aromatic amines by hydrogenation of the corresponding chlorinated nitro-aromatic compounds in the presence of a noble metal catalyst on a carbon support and in the presence of a sulfur compound, the improvement residing in that the sulfur compound is a thio-ether. Preferably the reaction is carried out in a weakly basic medium.Type: GrantFiled: November 1, 1976Date of Patent: November 22, 1977Assignee: Bayer AktiengesellschaftInventors: Helmuth Kritzler, Walter Bohm, Wolfgang Kiel, Udo Birkenstock