Patents by Inventor Clemens Osterholt
Clemens Osterholt 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: 7652180Abstract: The invention relates to a process for preparing alkyl chlorides by reacting alcohols with gaseous hydrogen chloride in the presence of a catalyst, wherein the catalyst comprises at least one compound of the structure: wherein R1 is a linear alkyl group having from 1 to 20 carbon atoms, R2, R3, and R4 is selected from a hydrogen, an alkyl, an alkenyl, an aralkyl or an alkylaryl group from 1 to 20 carbon atoms, wherein the substituents of R2, R3, and R4 are all identical, are all different or two of the substituents of R2, R3, and R4 type are identical.Type: GrantFiled: February 23, 2006Date of Patent: January 26, 2010Assignee: Degussa AGInventors: Clemens Osterholt, Manfred Neumann, Thomas Kuebelbaeck, Kerstin Bodmann
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Patent number: 7385092Abstract: A process for preparing diols or triols made up of a1) reacting at least one monoolefin having 4 to 20 carbon atoms with hydrogen peroxide and formic acid in the presence of water to form a mixture or a2) reacting at least one monoolefin alcohol having 4 to 20 carbon atoms first with formic acid, and then reacting the product formed thereby with hydrogen peroxide in the presence of water to form a mixture, b) removing, by distillation, the water and formic acid from the mixture obtained in a1) or a2), c) reacting the mixture obtained from b) with an aliphatic alcohol in the presence of a sulfonic acid to form the diol or triol and at least one formic ester by-product, and d) optionally removing, by distillation, the at least one formic ester by-product formed together with any residual at least one aliphatic C1-C4-alcohol to isolate the diol or triol.Type: GrantFiled: December 15, 2005Date of Patent: June 10, 2008Assignee: Degussa AGInventors: Clemens Osterholt, Volker Brehme, Thomas Kübelbäck, Günther Köhler
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Patent number: 7208640Abstract: A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, adding 2-aminoethanol and at least one base as assistants in the distillation, and isolating purified 2-methoxypropene.Type: GrantFiled: April 28, 2005Date of Patent: April 24, 2007Assignee: Degussa AGInventors: Günther Köhler, Volker Brehme, Manfred Neumann, Clemens Osterholt
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Publication number: 20060205987Abstract: The invention relates to a process for preparing alkyl chlorides by reacting alcohols with gaseous hydrogen chloride in the presence of a catalyst, wherein the catalyst comprises at least one compound of the structure: wherein R1 is a linear alkyl group having from 1 to 20 carbon atoms, R2, R3, and R4 is selected from a hydrogen, an alkyl, an alkenyl, an aralkyl or an alkylaryl group from 1 to 20 carbon atoms, wherein the substituents of R2, R3, and R4 are all identical, are all different or two of the substituents of R2, R3, and R4 type are identical.Type: ApplicationFiled: February 23, 2006Publication date: September 14, 2006Applicant: Degussa AGInventors: Clemens Osterholt, Manfred Neumann, Thomas Kubelback, Kerstin Bodmann
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Publication number: 20060161025Abstract: A process for preparing diols or triols made up of a1) reacting at least one monoolefin having 4 to 20 carbon atoms with hydrogen peroxide and formic acid in the presence of water to form a mixture or a2) reacting at least one monoolefin alcohol having 4 to 20 carbon atoms first with formic acid, and then reacting the product formed thereby with hydrogen peroxide in the presence of water to form a mixture, b) removing, by distillation, the water and formic acid from the mixture obtained in a1) or a2), c) reacting the mixture obtained from b) with an aliphatic alcohol in the presence of a sulfonic acid to form the diol or triol and at least one formic ester by-product, and d) optionally removing, by distillation, the at least one formic ester by-product formed together with any residual at least one aliphatic C1-C4-alcohol to isolate the diol or triol.Type: ApplicationFiled: December 15, 2005Publication date: July 20, 2006Applicant: Degussa AGInventors: Clemens Osterholt, Volker Brehme, Thomas Kuebelback, Gunther Kohler
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Publication number: 20050256312Abstract: A process for preparing 4-substituted 2,2,6,6-tetramethylpiperidin-N-oxy compounds (II) or mixtures of (II) and 4-substituted 2,2,6,6-tetramethylpiperidin-N-hydroxy compounds (III) where X+Y can be O or can represent a cyclic ketal with the radicals or can represent an open-chain ketal in which X?O—R and Y?O—R?, where R and R? can be identical or different and can each be CH3, CH2—CH3, CH2—CH2—CH3, CH(CH3)—CH3, CH2—CH2—CH2—CH3 and CH2—CH(CH3)—CH3, by oxidizing corresponding 4-substituted 2,2,6,6-tetramethylpiperidines (I) with hydrogen peroxide in the presence of alkali metal hydrogencarbonate and/or ammonium hydrogencarbonate and in the presence or absence of a solvent, in which the reaction is carried out with the addition of Brönsted acids which have an acid strength greater than that of the hydrogencarbonate.Type: ApplicationFiled: May 10, 2005Publication date: November 17, 2005Applicant: Degussa AGInventors: Clemens Osterholt, Heinz-Gunter Poll, Oliver Meyer, Thomas Kubelback
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Publication number: 20050245769Abstract: A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, adding 2-aminoethanol and at least one base as assistants in the distillation, and isolating purified 2-methoxypropene.Type: ApplicationFiled: April 28, 2005Publication date: November 3, 2005Applicant: DEGUSSA AGInventors: Gunther Kohler, Volker Brehme, Manfred Neumann, Clemens Osterholt
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Publication number: 20040186304Abstract: The present invention relates to a process for preparing acetals of &agr;,&bgr;-dicarbonyl compounds of the general formulaType: ApplicationFiled: March 22, 2004Publication date: September 23, 2004Applicant: DEGUSSA AGInventors: Johannes Ruwwe, Jutta Bruhl, Clemens Osterholt
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Patent number: 6756513Abstract: Monochlorinated hydrocarbons of high isomeric purity are prepared by a process, which comprises: reacting a monoalcohol having an alkyl radical having from 3 to 20 carbon atoms with cyanuric chloride; and purifying the resulting monochlorinated hydrocarbon by distillation after separation of salts and washing the monochlorinated hydrocarbon with alkali. The invention relates to a process for preparing monochlorinated hydrocarbons which contain an alkyl radical having from 3 to 20 carbon atoms and have a high isomeric purity by reacting a monoalcohol having a hydrocarbon radical containing an alkyl radical having from 3 to 20 carbon atoms to which additional cycloaliphatic radicals, aryl radicals, aralkyl radicals and alkylaryl radicals may be bound with cyanuric chloride, separating off salts, washing the reaction mixture with alkali and purifying the resulting monochlorinated hydrocarbons by distillation.Type: GrantFiled: August 16, 2002Date of Patent: June 29, 2004Assignee: Degussa AGInventors: Manfred Neumann, Clemens Osterholt
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Publication number: 20030065232Abstract: Monochlorinated hydrocarbons of high isomeric purity are prepared by a process, which comprises:Type: ApplicationFiled: August 16, 2002Publication date: April 3, 2003Applicant: DEGUSSA AGInventors: Manfred Neumann, Clemens Osterholt
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Patent number: 6262298Abstract: The invention relates to a process for the C-alkylation of dialkyl malonates, in which a dialkyl malonate is reacted with an alkyl halide in the presence of potassium carbonate as a hydrogen halide acceptor in an inert solvent, and a phase-transfer catalyst is not added until from 50 to 80% of the dialkyl malonate has reacted. The phase-transfer catalyst may be, for example, a tetraalkylammonium salt or a tetraalkylammonium hydroxide, a tetraalkylphosphonium salt or a tetraalkylphosphonium hydroxide or a crown ether.Type: GrantFiled: November 24, 1998Date of Patent: July 17, 2001Assignee: Huels AktiengesellschaftInventors: Josef Metz, Clemens Osterholt
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Patent number: 6121466Abstract: The invention relates to a process for the preparation of a macrocyclic ester of the general formula: in which m is an integer from 6 to 14 and n is an integer from 2 to 12.Type: GrantFiled: March 3, 1999Date of Patent: September 19, 2000Assignee: Huels AktiengesellschaftInventors: Clemens Osterholt, Josef Metz, Gunther Kohler, Marcel Feld
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Patent number: 6107496Abstract: A process for the preparation of cyclic esters of the general formula: ##STR1## in which m is an integer from 6-14 and n is an integer from 2-6, which comprises heating a dicarboxylic acid bis(glycol) ester of the general formula:HO--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH, formula IIin which m and n are as defined above,(b) optionally, up to 100% by weight, based on the weight of ester II, of esters of the general formula:H[O--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m --CO--].sub.x --O--(CH.sub.2).sub.n --OH, formula IIIH[O--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m CO--]X--OH and/orformula IVHO--CO--(CH.sub.2).sub.m --CO--[--O--(CH.sub.2).sub.n O--CO--(CH.sub.2).sub.m --CO--].sub.x --OH, formula Vin which m and n are as defined previously and x is an integer >1, and(c) a glycol of the general formula:HO--(CH.sub.2).sub.n --OH, formula VIin which n has the same numerical value as in formula I-V,(d) an inert high-boiling reaction medium, and(e) a catalyst.Type: GrantFiled: March 3, 1999Date of Patent: August 22, 2000Assignee: Huels AktiengesellschaftInventors: Clemens Osterholt, Josef Metz, Guenther Koehler
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Patent number: 6093286Abstract: A process for purifying at least 90% pure n-butyl chloride which is present in a mixture with other C.sub.1 to C.sub.4 alkyl chlorides, C.sub.1 to C.sub.4 alcohols, esters, ketones, nitrites, and organic sulfur compounds. In this process the mixture is first distilled, with high-boilers being separated off, and then washed in a plurality of stages with water and with dilute alkali metal hydroxide solution, and, optionally, an aqueous solution of H.sub.2 O.sub.2. In this manner, even a typical impurities may be separated off and a >99% pure product may be obtained.Type: GrantFiled: May 28, 1998Date of Patent: July 25, 2000Assignee: Huels AktiengesellschaftInventors: Clemens Osterholt, Josef Metz, Udo Jegelka
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Patent number: 5831137Abstract: In the continuous preparation of alkyl halides from branched olefins and hydrohalic acids, the reaction is carried out without the addition of catalysts and without solvents. With a high olefin conversion, alkyl halides are obtained with high selectivity and with very good color quality.Type: GrantFiled: February 10, 1997Date of Patent: November 3, 1998Assignee: Huels AktiengesellschaftInventors: Josef Metz, Clemens Osterholt
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Patent number: 5770780Abstract: In the preparation of alkyl halides from cycloaliphatic olefins and hydrohalic acids, the reaction is carried out at a temperature below the boiling point of the olefin without the addition of catalyst and without a solvent. At a high olefin conversion rate, alkyl halides are obtained with high selectivity and with very good color quality.Type: GrantFiled: February 10, 1997Date of Patent: June 23, 1998Assignee: Huels AktiengesellschaftInventors: Josef Metz, Clemens Osterholt
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Patent number: 5767330Abstract: The preparation of long-chain alkyl chlorides from alcohols and hydrogen chloride is improved by carrying out the reaction at a temperature below the boiling point of the alkyl chloride, and distilling off the resulting alkyl chloride by feeding in additional hydrochloric acid.Type: GrantFiled: February 10, 1997Date of Patent: June 16, 1998Assignee: Huels AktiengesellschaftInventors: Josef Metz, Clemens Osterholt, Juergen Lange