Patents by Inventor Stefan Palsherm
Stefan Palsherm 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: 9365480Abstract: A process for the manufacture of an alkenone comprising the steps of: (a) providing a halogenated precursor of the alkenone and (b) subjecting at least a fraction of the halogenated precursor of step (a) to a thermolysis reaction to form a reaction mixture comprising the alkenone and a hydrogen halide wherein the hydrogen halide is removed from the reaction mixture by cyclonic separation is described.Type: GrantFiled: August 20, 2013Date of Patent: June 14, 2016Assignee: SOLVAY SAInventors: Max Josef Braun, Stefan Palsherm
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Publication number: 20150239817Abstract: A process for the manufacture of an alkenone comprising the steps of: (a) providing a halogenated precursor of the alkenone and (b) subjecting at least a fraction of the halogenated precursor of step (a) to a thermolysis reaction to form a reaction mixture comprising the alkenone and a hydrogen halide wherein the hydrogen halide is removed from the reaction mixture by cyclonic separation is described.Type: ApplicationFiled: August 20, 2013Publication date: August 27, 2015Inventors: Max Josef Braun, Stefan Palsherm
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Patent number: 8957254Abstract: Process for synthesizing a chemical, in particular an agriculturally or pharmaceutically active compound, including: a first step comprising reacting a carboxylic acid halide with a vinyl ether to prepare a halogenated precursor of an alkenone; a second step comprising eliminating hydrogen halide from such precursor to form an alkenone, preferably by thermolysis under specific conditions; and a third step which uses the formed alkenone as a building block to synthesize the chemical. First step may be done in a liquid reaction medium comprising an alkenone or a halogenated alkenone precursor, or in a liquid reaction medium in turbulent state, specifically by creation of gas bubbles of the carboxylic acid halide herein. Second step may include a flash thermolysis, vacuum thermolysis, thermolysis under stripping with inert gas, and/or a thermolysis at a temperature from >90° C. to 120° C. Third step preferably comprises reacting the alkenone with a nitrogen-containing compound.Type: GrantFiled: October 4, 2013Date of Patent: February 17, 2015Assignee: Solvay SAInventors: Max Braun, Stefan Palsherm, Uta Claassen, Alain Lambert
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Publication number: 20140051892Abstract: Process for synthesizing a chemical, in particular an agriculturally or pharmaceutically active compound, including: a first step comprising reacting a carboxylic acid halide with a vinyl ether to prepare a halogenated precursor of an alkenone; a second step comprising eliminating hydrogen halide from such precursor to form an alkenone, preferably by thermolysis under specific conditions; and a third step which uses the formed alkenone as a building block to synthesize the chemical. First step may be done in a liquid reaction medium comprising an alkenone or a halogenated alkenone precursor, or in a liquid reaction medium in turbulent state, specifically by creation of gas bubbles of the carboxylic acid halide herein. Second step may include a flash thermolysis, vacuum thermolysis, thermolysis under stripping with inert gas, and/or a thermolysis at a temperature from >90° C. to 120° C. Third step preferably comprises reacting the alkenone with a nitrogen-containing compound.Type: ApplicationFiled: October 4, 2013Publication date: February 20, 2014Applicant: SOLVAY SAInventors: Max BRAUN, Stefan PALSHERM, Uta CLAASSEN, Alain LAMBERT
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Patent number: 8552221Abstract: A process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium under turbulent conditions and a process for preparing an alkenone, by eliminating hydrogen halide from said precursor to form the alkenone.Type: GrantFiled: July 5, 2010Date of Patent: October 8, 2013Assignee: Solvay SAInventors: Max Josef Braun, Stefan Palsherm, Uta Claassen
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Patent number: 8440865Abstract: Process for preparing an alkenone, which comprises the following steps: (a) providing a halogenated precursor of the alkenone; and (b) eliminating the hydrogen halide from said precursor to form the alkenone by a thermolysis treatment selected from the group consisting of flash thermolysis, vacuum thermolysis, and thermolysis under stripping with inert gas.Type: GrantFiled: July 5, 2010Date of Patent: May 14, 2013Assignee: SOLVAY SAInventors: Max Braun, Stefan Palsherm, Uta Claassen, Alain Lambert
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Patent number: 8426650Abstract: A process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium comprising an alkenone or a halogenated precursor of the alkenone, and a process for preparing an alkenone, which comprises (a) reacting a carboxylic acid halide with a vinyl ether by introducing vinyl ether into a liquid reaction medium containing carboxylic acid halide to form a halogenated precursor of the alkenone and (b) eliminating hydrogen halide from said precursor to form the alkenone.Type: GrantFiled: July 5, 2010Date of Patent: April 23, 2013Assignee: Solvay SAInventors: Max Braun, Stefan Palsherm, Uta Claassen
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Publication number: 20120116128Abstract: A process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium comprising an alkenone or a halogenated precursor of the alkenone, and a process for preparing an alkenone, which comprises (a) reacting a carboxylic acid halide with a vinyl ether by introducing vinyl ether into a liquid reaction medium containing carboxylic acid halide to form a halogenated precursor of the alkenone and (b) eliminating hydrogen halide from said precursor to form the alkenone.Type: ApplicationFiled: July 5, 2010Publication date: May 10, 2012Applicant: SOLVAY SAInventors: Max Braun, Stefan Palsherm, Uta Claassen
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Publication number: 20120116127Abstract: Process for preparing an alkenone, which comprises the following steps: (a) providing a halogenated precursor of the alkenone; and (b) eliminating the hydrogen halide from said precursor to form the alkenone by a thermolysis treatment selected from the group consisting of flash thermolysis, vacuum thermolysis, and thermolysis under stripping with inert gas.Type: ApplicationFiled: July 5, 2010Publication date: May 10, 2012Applicant: SOLVAY SAInventors: Max Braun, Stefan Palsherm, Uta Claassen, Alain Lambert
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Publication number: 20120101305Abstract: A process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium under turbulent conditions and a process for preparing an alkenone, by eliminating hydrogen halide from said precursor to form the alkenone.Type: ApplicationFiled: July 5, 2010Publication date: April 26, 2012Applicant: SOLVAY SAInventors: Max Braun, Stefan Palsherm, Uta Claasen
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Publication number: 20110110844Abstract: Manganese tetrafluoride is prepared by a reaction between manganese difluoride or manganese trifluoride particles and elemental fluorine. During the reaction, surfaces of the particles are rendered fresh, e.g. by mechanical impact on the particles. Thereby, also agglomeration, sintering or vitrification of the particles is prevented. The impact is not so intensive that the particles would be crushed.Type: ApplicationFiled: December 9, 2008Publication date: May 12, 2011Applicant: SOLVAY FLUOR GMBHInventors: Ulrich Seseke-Koyro, Placido Garcia-Juan, Stefan Palsherm, Alf Schulz
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Patent number: 7282120Abstract: A method of producing alkanes containing chlorine by addition of chlorine to C—C double bonds or C—C triple bonds or by exchange of hydrogen for chlorine by contacting the starting compound in the gas or liquid phase with elemental chlorine and irradiating the reaction mixture with UV light having a wavelength of ??280 nm. In this way pentachloroethane can be produced from trichloroethylene, CFC-113 from HCFC-123 or HFC-133a, CFC-112a from HCFC-142b, or HCFC-123 from HCFC-133a. The method also is suitable for separating photochlorinatable impurities from HFC-365-mfc to obtain purified HFC-365-mfc. Advantages include high yields and excellent selectivity.Type: GrantFiled: December 10, 2004Date of Patent: October 16, 2007Assignee: Solvay Fluor GmbHInventors: Max Braun, Kerstin Eichholz, Stefan Palsherm, Carsten Brosch
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Publication number: 20050101811Abstract: A method of producing alkanes containing chlorine by addition of chlorine to C—C double bonds or C—C triple bonds or by exchange of hydrogen for chlorine by contacting the starting compound in the gas or liquid phase with elemental chlorine and irradiating the reaction mixture with UV light having a wavelength of ?>280 nm. In this way pentachloroethane can be produced from trichloroethylene, CFC-113 from HCFC-123 or HFC-133a, CFC-112a from HCFC-142b, or HCFC-123 from HCFC-133a. The method also is suitable for separating photochlorinatable impurities from HFC-365-mfc to obtain purified HFC-365-mfc. Advantages include high yields and excellent selectivity.Type: ApplicationFiled: December 10, 2004Publication date: May 12, 2005Applicant: Solvay Pharmaceuticals GmbHInventors: Max Braun, Kerstin Eichholz, Stefan Palsherm, Carsten Brosch
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Patent number: 6723874Abstract: Acid fluorides, for example carboxylic acid fluorides and sulfuryl fluoride are produced by reacting the corresponding acid chlorides with hydrogen fluoride adducts of ammonium fluoride or amine hydrofluorides (which act as a catalyst or as a fluorination agent). Consumed HF adducts may be regenerated with HF.Type: GrantFiled: May 30, 2001Date of Patent: April 20, 2004Assignee: Solvay Fluor und Derivate GmbHInventors: Max Braun, Matthias Rieland, Francine Janssens, Kerstin Eichholz, Stefan Palsherm
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Publication number: 20040016633Abstract: A method of producing alkanes containing chlorine by addition of chlorine to C—C double bonds or C—C triple bonds or by exchange of hydrogen for chlorine by contacting the starting compound in the gas or liquid phase with elemental chlorine and irradiating the reaction mixture with UV tight having a wavelength of &lgr;≧280 nm. In this way pentachloroethane can be produced from trichloroethylene, CFC-113 from HCFC-123 or HFC-133a, CFC-112a from HCFC-142b, or HCFC-123 from HCFC-133a. The method also is suitable for separating photochlorinatable impurities from HFC-365-mfc to obtain purified HFC-365-mfc. Advantages include high yields and excellent selectivity.Type: ApplicationFiled: July 28, 2003Publication date: January 29, 2004Applicant: Solvay Pharmaceuticals GmbHInventors: Max Braun, Kerstin Eichholz, Stefan Palsherm, Carsten Brosch
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Patent number: 6521199Abstract: Hydrogen fluoride adducts and ammonium fluorides are used for fluorinating acid chlorides and halocarbon compounds such as chloroalkanes or chloronated ethers. The used adducts can be regenerated and then reused in the fluorination reactions.Type: GrantFiled: March 4, 2002Date of Patent: February 18, 2003Assignee: Solvay Fluor und Derivate GmbHInventors: Max Braun, Stefan Palsherm
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Publication number: 20020173681Abstract: Hydrogen fluoride adducts and ammonium fluorides are used for fluorinating acid chlorides and halocarbon compounds such as chloroalkanes or chloronated ethers. The used adducts can be regenerated and then reused in the fluorination reactions.Type: ApplicationFiled: March 4, 2002Publication date: November 21, 2002Inventors: Max Braun, Stefan Palsherm
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Publication number: 20020125122Abstract: A method of producing alkanes containing chlorine by addition of chlorine to C—C double bonds or C—C triple bonds or by exchange of hydrogen for chlorine by contacting the starting compound in the gas or liquid phase with elemental chlorine and irradiating the reaction mixture with UV light having a wavelength of &lgr;≧280 nm. In this way pentachloroethane can be produced from trichloroethylene, CFC-113 from HCFC-123 or HFC-133a, CFC-112a from HCFC-142b, or HCFC-123 from HCFC-133a. The method also is suitable for separating photochlorinatable impurities from HFC-365-mfc to obtain purified HFC-365-mfc. Advantages include high yields and excellent selectivity.Type: ApplicationFiled: December 17, 2001Publication date: September 12, 2002Inventors: Max Braun, Kerstin Eichholz, Stefan Palsherm, Carsten Brosch
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Patent number: 6252105Abstract: Organic compounds, e.g. fluorinated organic compounds such as fluorinated carboxylic acids or fluorinated carboxylic acid chlorides, may contain small amounts of carboxylic acid fluorides, hydrogen fluoride or hydrolyzable fluoride, which during the preparation of derivatives of the fluorinated organic compounds, for example by esterification, may yield corrosive fluorides or hydrogen fluoride. The invention is a method for the synthesis and/or purification of preferably fluorinated organic compounds such as carboxylic acids, carboxylic acid chlorides and derivatives such as esters thereof, starting from corresponding carboxylic acid chlorides containing acid fluorides or hydrolyzable fluoride, and alcohols under the catalytic action of “onium” salts of carboxylic acids, to obtain products which have a low fluoride content. Alternatively, an inorganic oxide adsorbent is utilized.Type: GrantFiled: July 6, 1999Date of Patent: June 26, 2001Assignee: Solvay Fluor und Derivate GmbHInventors: Max Braun, Johannes Eicher, Francine Janssens, Kerstin Eichholz, Stefan Palsherm
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Patent number: 5894075Abstract: The addition of hydrogen fluoride to unsaturated C--C groups and the chlorine-fluorine exchange on perhalogenated carbon atoms can be advantageously catalyzed by a catalyst mixture which comprises at least partially fluorinated titanium halide in combination with tin (IV) halide.Type: GrantFiled: December 23, 1996Date of Patent: April 13, 1999Assignee: Solvay Fluor und Derivate GmbHInventors: Max Braun, Werner Rudolph, Stefan Palsherm