Patents by Inventor Torsten Balduf
Torsten Balduf 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: 11919846Abstract: Methacrolein is prepared in a continuous process by a Mannich condensation reaction of formaldehyde with propanal. A methacrolein polymerization inhibitor is introduced during the production process and a part thereof is recycled back into the reactor where the Mannich condensation reaction is carried out.Type: GrantFiled: August 1, 2019Date of Patent: March 5, 2024Assignee: Röhm GmbHInventors: Alexander Lygin, Steffen Krill, Matthias Grömping, Torsten Balduf, Rudolf Burghardt
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Publication number: 20210363089Abstract: Methacrolein is prepared in a continuous process by a Mannich condensation reaction of formaldehyde with propanal. A methacrolein polymerization inhibitor is introduced during the production process and a part thereof is recycled back into the reactor where the Mannich condensation reaction is carried out.Type: ApplicationFiled: August 1, 2019Publication date: November 25, 2021Applicant: Röhm GmbHInventors: Alexander Lygin, Steffen Krill, Matthias Grömping, Torsten Balduf, Rudolf Burghardt
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Patent number: 10766847Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: GrantFiled: October 16, 2018Date of Patent: September 8, 2020Assignee: RÖHM GMBHInventors: Steffen Krill, Torsten Balduf, Martin Koestner, Matthias Groemping, Alexander Lygin, Rudolf Burghardt
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Patent number: 10457626Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: GrantFiled: October 16, 2018Date of Patent: October 29, 2019Assignee: EVONIK ROEHM GmbHInventors: Steffen Krill, Torsten Balduf, Martin Koestner, Matthias Groemping, Alexander Lygin, Rudolf Burghardt
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Patent number: 10273201Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: GrantFiled: October 27, 2017Date of Patent: April 30, 2019Assignee: EVONIK RÖHM GmbHInventors: Steffen Krill, Torsten Balduf, Martin Koestner, Matthias Groemping, Alexander Lygin, Rudolf Burghardt
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Publication number: 20190112255Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: ApplicationFiled: October 16, 2018Publication date: April 18, 2019Applicant: Evonik Roehm GmbHInventors: Steffen KRILL, Torsten BALDUF, Martin KOESTNER, Matthias GROEMPING, Alexander LYGIN, Rudolf BURGHARDT
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Publication number: 20190077742Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: ApplicationFiled: October 16, 2018Publication date: March 14, 2019Applicant: Evonik Roehm GmbHInventors: Steffen KRILL, Torsten BALDUF, Martin KOESTNER, Matthias GROEMPING, Alexander LYGIN, Rudolf BURGHARDT
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Patent number: 10125077Abstract: The present invention relates to an optimized process for preparing methacrylic acid, wherein methacrolein is prepared in a first stage from propionaldehyde and formaldehyde by means of a Mannich reaction and oxidized in a second stage to methacrylic acid. More particularly, the present invention relates to the reduction in the amounts of catalyst to be used in the first stage, especially to the reduction in the amounts of acid to be used here, by virtue of the additional installation of recycling streams suitable for the purpose.Type: GrantFiled: November 16, 2015Date of Patent: November 13, 2018Assignee: Evonik Röhm GmbHInventors: Steffen Krill, Rudolf Burghardt, Melanie Raczek, Torsten Balduf
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Patent number: 9994507Abstract: The present invention relates to an optimized process for the preparation of methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for the preparation of methacrylic acid, methyl methacrylate or even active ingredients, fragrances or flavorings. In particular the present invention relates to the optimization of the process parameters by which, inter alia, a reduction of the content of harmful dimeric methacrolein in the end product may be achieved.Type: GrantFiled: September 16, 2015Date of Patent: June 12, 2018Assignee: Evonik Roehm GmbHInventors: Rudolf Burghardt, Steffen Krill, Torsten Balduf, Gerhard Koelbl, Martin Koestner, Eduard Rundal
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Patent number: 9963417Abstract: The present invention relates to a catalytic continuous process for producing methyl methacrylate, said process comprising the step of reacting methacrolein with oxygen and methanol in the presence of a heterogeneous noble-metal-containing catalyst in an oxidative esterification reaction to give methyl methacrylate, characterized in that the stationary concentration of the starting material methacrolein is equal to or less than 12% by weight based on the total weight of the reaction mixture in the reactor, and the ratio F between the total liquid volume within the reactor expressed in liters divided by the total weight of catalyst in the reactor expressed in kilograms is equal to or less than 4.Type: GrantFiled: December 11, 2014Date of Patent: May 8, 2018Assignee: Evonik Roehm GmbHInventors: Steffen Krill, Alexander Lygin, Matthias Groemping, Torsten Balduf, Rudolf Burghardt
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Publication number: 20180050977Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: ApplicationFiled: October 27, 2017Publication date: February 22, 2018Applicant: Evonik Roehm GmbHInventors: Steffen Krill, Torsten Balduf, Martin Koestner, Matthias Groemping, Alexander Lygin, Rudolf Burghardt
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Patent number: 9890105Abstract: The present invention relates to a process for producing methyl methacrylate, comprising the following steps: A) producing methacrolein and B) reacting the methacrolein obtained in step A) in an oxidative esterification reaction to give methyl methacrylate, characterized in that the two steps A) and B) take place in a liquid phase at a pressure of from 2 to 100 bar, and step B) is carried out in the presence of a heterogeneous noble-metal-containing catalyst comprising metals and/or comprising metal oxides.Type: GrantFiled: April 11, 2014Date of Patent: February 13, 2018Assignee: EVONIK ROEHM GmbHInventors: Steffen Krill, Torsten Balduf, Martin Koestner, Matthias Groemping, Alexander Lygin, Rudolf Burghardt
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Patent number: 9816703Abstract: The present invention relates to the oxidative combustion of amine-containing wastewaters, especially in a process for preparing methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for preparation of methacrylic acid, methyl methacrylate, or else of active ingredients, odorants or flavorings. More particularly, the present invention relates to an oxidative combustion of the amine-containing wastewaters with only low nitrogen oxide formation.Type: GrantFiled: July 15, 2014Date of Patent: November 14, 2017Assignee: EVONIK ROEHM GmbHInventors: Steffen Krill, Torsten Balduf, Rudolf Burghardt, Gerhard Koelbl, Reed Zhao
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Publication number: 20170305830Abstract: The present invention relates to an optimized process for preparing methacrylic acid, wherein methacrolein is prepared in a first stage from propionaldehyde and formaldehyde by means of a Mannich reaction and oxidized in a second stage to methacrylic acid. More particularly, the present invention relates to the reduction in the amounts of catalyst to be used in the first stage, especially to the reduction in the amounts of acid to be used here, by virtue of the additional installation of recycling streams suitable for the purpose.Type: ApplicationFiled: November 16, 2015Publication date: October 26, 2017Applicant: Evonik Roehm GmbHInventors: Steffen KRILL, Rudolf BURGHARDT, Melanie RACZEK, Torsten BALDUF
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Publication number: 20170275227Abstract: The present invention relates to an optimized process for the preparation of methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for the preparation of methacrylic acid, methyl methacrylate or even active ingredients, fragrances or flavourings. In particular the present invention relates to the optimization of the process parameters by which, inter alia, a reduction of the content of harmful dimeric methacrolein in the end product may be achieved.Type: ApplicationFiled: September 16, 2015Publication date: September 28, 2017Applicant: Evonik Röhm GmbHInventors: Rudolf BURGHARDT, Steffen KRILL, Torsten BALDUF, Gerhard KOELBL, Martin KOESTNER, Eduard RUNDAL
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Patent number: 9732023Abstract: The invention relates to a process for preparation of at least one of methacrylic acid and a methacrylic acid ester, comprising the process stepsgas phase oxidation of at least one C4 compound, quenching of the reaction phase, separation and purification of the obtained methacrylic acid and optionally esterification, wherein the C4 compound is a methacrolein comprising mixture, originating from at least two different methacrolein sources, a first methacrolein source being a feed stream obtained by the heterogeneously catalyzed gas phase oxidation of isobutylene or tert-butyl alcohol or isobutylaldehyde or a mixture of two or more thereof, a second methacrolein source being a feed stream obtained by the reaction of propionaldehyde with a C1 extending agent, preferably formaldehyde, and where said methacrolein can be obtained either completely from the first methacrolein source, or completely from the second methacrolein source or from any mixture of both.Type: GrantFiled: March 13, 2014Date of Patent: August 15, 2017Assignee: EVONIK ROEHM GmbHInventors: Torsten Balduf, Steffen Krill, Rudolf Burghardt
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Patent number: 9617199Abstract: The present invention relates to a process for preparing methyl methacrylate by a direct oxidative esterification of methacrolein with oxygen and methanol, which is conducted in the liquid phase at a pressure of 2 to 100 bar with a gold catalyst. According to the invention, the liquid phase is withdrawn continuously from the reactor and optionally enriched with oxygenous gas, the pH, after the withdrawal, is adjusted to a pH between 5 and 9 by means of addition of a basic solution and this liquid phase is conducted back into the reactor again to an extent of at least 50%.Type: GrantFiled: December 5, 2014Date of Patent: April 11, 2017Assignee: EVONIK ROEHM GmbHInventors: Steffen Krill, Alexander Lygin, Torsten Balduf, Rudolf Burghardt, Andreas Tepperis, Matthias Groemping
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Patent number: 9611204Abstract: The present invention concerns regulating the water content in a process for production of methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for production of methacrylic acid, methyl methacrylate or else of active, aroma or flavor chemicals. The present invention is particularly concerned with regulating the water content in a process for production of methacrolein from formaldehyde and propionaldehyde via a Mannich condensation.Type: GrantFiled: July 15, 2014Date of Patent: April 4, 2017Assignee: EVONIK RÖHM GmbHInventors: Rudolf Burghardt, Frederik Gluth, Gerhard Koelbl, Steffen Krill, Torsten Balduf
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Patent number: 9580374Abstract: The present invention relates to a process for preparing methyl methacrylate by direct oxidative esterification of methacrolein and the preparation of methacrolein. It is a feature of this novel process that it was possible to distinctly increase the yield and the efficiency of the process compared to the prior art through a sequence of different distillation steps.Type: GrantFiled: August 27, 2014Date of Patent: February 28, 2017Assignee: EVONIK ROEHM GmbHInventors: Steffen Krill, Matthias Groemping, Alexander Lygin, Torsten Balduf, Rudolf Burghardt
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Publication number: 20160280624Abstract: The present invention relates to a process for producing methacrolein from propionaldehyde and formalin. This novel process is notable in that the catalyst system used for this reaction is modified by the simultaneous presence of secondary and tertiary amines such that the synthesis can be carried out more efficiently and with less purification being required.Type: ApplicationFiled: December 3, 2014Publication date: September 29, 2016Applicant: EVONIK ROEHM GMBHInventors: Rudolf BURGHARDT, Steffen KRILL, Torsten BALDUF, Eduard RUNDAL