Patents by Inventor Pablo Zacchi
Pablo Zacchi 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: 9927120Abstract: The invention relates to a method for thermally after-burning the waste gas flows developing during the production of acrolein in a gas phase process and for thermally after-burning the waste gas flows developing during the production of hydrocyanic acid in a gas phase process, characterized in that the waste gas flows from the production of acrolein and the waste gas flows from the production of hydrocyanic acid are supplied to a joint thermal after-burning process.Type: GrantFiled: December 19, 2011Date of Patent: March 27, 2018Assignee: Evonik Degussa GmbHInventors: Caspar Heinrich Finkeldei, Pablo Zacchi, Martin Körfer
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Patent number: 9206121Abstract: A method to produce D,L-Methionine from 2-hydroxy-4-(methylthio)butyronitrile by reaction with ammonia, optionally in the presence of carbon dioxide, is provided. The 2-hydroxy-4-(methylthio)butyronitrile is obtained by reaction of 3-methylmercaptopropionaldehyde with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of a multizone reactor. Residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.Type: GrantFiled: March 27, 2015Date of Patent: December 8, 2015Assignee: EVONIK DEGUSSA GmbHInventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
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Patent number: 9133113Abstract: A method for the production of 2-hydroxy-4-methylthiobutyric acid by hydrolysis of 2-hydroxy-4-(methylthio)butyronitrile is provided. 3-Methylmercaptopropionaldehyde is reacted with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of the multizone reactor to form a reaction mixture comprising the 2-hydroxy-4-(methylthio)butyronitrile, unreacted 3-methylmercaptopropionaldehyde, the catalyst and residual amounts of gaseous hydrogen cyanide. The residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.Type: GrantFiled: March 27, 2014Date of Patent: September 15, 2015Assignee: EVONIK DEGUSSA GmbHInventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
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Publication number: 20150197489Abstract: A method to produce D,L-Methionine from 2-hydroxy-4-(methylthio)butyronitrile by reaction with ammonia, optionally in the presence of carbon dioxide, is provided. The 2-hydroxy-4-(methylthio)butyronitrile is obtained by reaction of 3-methylmercapto-propionaldehyde with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of a multizone reactor. Residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.Type: ApplicationFiled: March 27, 2015Publication date: July 16, 2015Applicant: Evonik Degussa GmbHInventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
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Patent number: 8877981Abstract: A process to produce 3-methylmercaptopropionaldehyde is provided.Type: GrantFiled: June 26, 2013Date of Patent: November 4, 2014Assignee: Evonik Industries AGInventors: Pablo Zacchi, Caspar Finkeldei, Martin Koerfer
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Publication number: 20140213819Abstract: A method for the production of 2-hydroxy-4-(methylthio)butyronitrile having good storage stability in a multi-zone reactor, is provided. 3-methylmercaptopropionaldehyde is reacted with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of the multizone reactor to form a reaction mixture comprising the 2-hydroxy-4-(methylthio)butyronitrile, unreacted 3-methylmercaptopropionaldehyde, the catalyst and residual amounts of gaseous hydrogen cyanide. The residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.Type: ApplicationFiled: March 27, 2014Publication date: July 31, 2014Applicant: EVONIK DEGUSSA GmbHInventors: Dieter BUSS, Martin STEURENTHALER, Michael R. RINNER, Stephan KRETZ, Hans Joachim HASSELBACH, Caspar-Heinrich FINKELDEI, Martin KOERFER, Pablo ZACCHI
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Patent number: 8759592Abstract: A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ether.Type: GrantFiled: October 30, 2013Date of Patent: June 24, 2014Assignee: Evonik Degussa GmbHInventors: Caspar Heinrich Finkeldei, Pablo Zacchi, Benjamin Fonfe, Stephan Kretz, Martin Koerfer, Hans Joachim Hasselbach, Wolfgang Boeck
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Patent number: 8729288Abstract: A method for the production of 2-hydroxy-4-(methylthio)butyronitrile having good storage stability in a multi-zone reactor, is provided. 3-methylmercaptopropionaldehyde is reacted with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of the multizone reactor to form a reaction mixture comprising the 2-hydroxy-4-(methylthio)butyronitrile, unreacted 3-methylmercaptopropionaldehyde, the catalyst and residual amounts of gaseous hydrogen cyanide. The residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.Type: GrantFiled: February 22, 2012Date of Patent: May 20, 2014Assignee: Evonik Degussa GmbHInventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
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Publication number: 20140051890Abstract: A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ether.Type: ApplicationFiled: October 30, 2013Publication date: February 20, 2014Applicant: EVONIK DEGUSSA GmbHInventors: Caspar Heinrich FINKELDEI, Pablo Zacchi, Benjamin Fonfe, Stephan Kretz, Martin Koerfer, Hans Joachim Hasselbach, Wolfgang Boeck
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Patent number: 8624066Abstract: A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ether.Type: GrantFiled: December 27, 2011Date of Patent: January 7, 2014Assignee: Evonik Degussa GmbHInventors: Caspar Heinrich Finkeldei, Pablo Zacchi, Benjamin Fonfe, Stephan Kretz, Martin Koerfer, Hans Joachim Hasselbach, Wolfgang Boeck
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Publication number: 20140005437Abstract: A process to produce 3-methylmercaptopropionaldehyde is provided.Type: ApplicationFiled: June 26, 2013Publication date: January 2, 2014Applicant: Evonik Industries AGInventors: Pablo ZACCHI, Caspar Heinrich Finkeldei, Martin Koerfer
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Publication number: 20130295509Abstract: The invention relates to a method for thermally after-burning the waste gas flows developing during the production of acrolein in a gas phase process and for thermally after-burning the waste gas flows developing during the production of hydrocyanic acid in a gas phase process, characterized in that the waste gas flows from the production of acrolein and the waste gas flows from the production of hydrocyanic acid are supplied to a joint thermal after-burning process.Type: ApplicationFiled: December 19, 2011Publication date: November 7, 2013Applicant: EVONIK DEGUSSA GmbHInventors: Caspar Heinrich Finkeldei, Pablo Zacchi, Martin Körfer
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Publication number: 20120215022Abstract: A method for the production of 2-hydroxy-4-(methylthio)butyronitrile having good storage stability in a multi-zone reactor, is provided. 3-methylmercaptopropionaldehyde is reacted with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of the multizone reactor to form a reaction mixture comprising the 2-hydroxy-4-(methylthio)butyronitrile, unreacted 3-methylmercaptopropionaldehyde, the catalyst and residual amounts of gaseous hydrogen cyanide. The residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.Type: ApplicationFiled: February 22, 2012Publication date: August 23, 2012Applicant: Evonik Degussa GmbHInventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
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Publication number: 20120165573Abstract: A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ether.Type: ApplicationFiled: December 27, 2011Publication date: June 28, 2012Applicant: EVONIK DEGUSSA GmbHInventors: Caspar Heinrich FINKELDEI, Pablo Zacchi, Benjamin Fonfe, Stephan Kretz, Martin Koerfer, Hans Joachim Hasselbach, Wolfgang Boeck