Patents by Inventor Florian Zschunke
Florian Zschunke 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: 11939288Abstract: A process for producing alkyl methacrylates, in particular methyl methacrylate (MMA), includes production of methacrolein (MAL) in a first reaction stage; direct oxidative esterification (DOE) of the methacrolein with an alcohol, preferably methanol, to afford an alkyl methacrylate in a second reaction stage; and workup of the alkyl methacrylate crude product from the second reaction stage. An optimized workup of the reactor output from the oxidative esterification of methacrolein involves minimizing the amount of employed water, the amount of employed acid, and/or the amount of aqueous waste streams, through an optimized recycling of the generated process water streams.Type: GrantFiled: November 23, 2022Date of Patent: March 26, 2024Assignee: Röhm GmbHInventors: Florian Zschunke, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
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Patent number: 11780944Abstract: A process can be used for producing optical molding materials on the basis of methyl methacrylate (MMA). The MMA produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. An optimized workup of the reactor output from the oxidative esterification of methacrolein can be used for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands are placed on plant apparatus configuration.Type: GrantFiled: July 22, 2022Date of Patent: October 10, 2023Assignee: Röhm GmbHInventors: Steffen Krill, Belaid Ait Aissa, Florian Zschunke, Gerhard Kölbl, Rüdiger Carloff
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Patent number: 11680033Abstract: A process and a preparation plant prepares methacrolein from formaldehyde and propionaldehyde, in presence of water and a homogeneous catalyst based at least on an acid and a base. A reaction mixture is introduced into a methacrolein workup plant and separated in a first distillation column, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed and, in a first phase separator, the organic phase and the aqueous phase of the condensate are separated from one another. The aqueous phase is introduced into a second distillation column, that is not part of the methacrolein workup plant, and is separated into a third distillation mixture in a gas phase at the top and a fourth distillation mixture at the bottom. The third distillation mixture is introduced into the methacrolein workup plant.Type: GrantFiled: August 20, 2020Date of Patent: June 20, 2023Assignee: Röhm GmbHInventors: Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
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Publication number: 20230174456Abstract: A process can be used for producing hydroxyalkyl (meth)acrylate esters, in particular hydroxyethyl methacrylate (HEMA). The process involves a first reaction of (meth)acrolein with at least one polyhydric alcohol, in particular ethylene glycol, in the presence of a first catalyst C1, wherein a first reaction product containing a cyclic acetal is obtained. The process then involves a second reaction of the first reaction product with oxygen in the presence of a second catalyst C2, wherein a second reaction product containing at least one hydroxyalkyl (meth)acrylate ester is obtained. After the first reaction, water and optionally further components, in particular (meth)acrolein and/or the polyhydric alcohol, e.g. ethylene glycol, are at least partially removed from the first reaction product.Type: ApplicationFiled: April 19, 2021Publication date: June 8, 2023Applicant: Röhm GmbHInventors: Andreas RÜHLING, Steffen Krill, Florian Zschunke, Belaid Ait Aissa
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Publication number: 20230096748Abstract: A process for producing alkyl methacrylates, in particular methyl methacrylate (MMA), includes production of methacrolein (MAL) in a first reaction stage; direct oxidative esterification (DOE) of the methacrolein with an alcohol, preferably methanol, to afford an alkyl methacrylate in a second reaction stage: and workup of the alkyl methacrylate crude product from the second reaction stage. An optimized workup of the reactor output from the oxidative esterification of methacrolein involves minimizing the amount of employed water, the amount of employed acid, and/or the amount of aqueous waste streams, through an optimized recycling of the generated process water streams.Type: ApplicationFiled: November 23, 2022Publication date: March 30, 2023Applicant: Röhm GmbHInventors: Florian ZSCHUNKE, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
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Patent number: 11560350Abstract: A process for producing alkyl methacrylates, in particular methyl methacrylate (MMA), includes production of methacrolein (MAL) in a first reaction stage; direct oxidative esterification (DOE) of the methacrolein with an alcohol, preferably methanol, to afford an alkyl methacrylate in a second reaction stage; and workup of the alkyl methacrylate crude product from the second reaction stage. An optimized workup of the reactor output from the oxidative esterification of methacrolein involves minimizing the amount of employed water, the amount of employed acid, and/or the amount of aqueous waste streams, through an optimized recycling of the generated process water streams.Type: GrantFiled: September 15, 2020Date of Patent: January 24, 2023Assignee: Röhm GmbHInventors: Florian Zschunke, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
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Patent number: 11542218Abstract: A process and a preparation plant can prepare methacrolein from formaldehyde and propionaldehyde in the presence of a homogeneous catalyst mixture based at least on an acid and a base. For a good workup of the reaction mixture leaving the reactor, with a good energy balance and where the process has simplified apparatus implementation, the liquid reaction mixture under pressure is expanded in an expansion vessel and separated into a first expansion mixture in a gas phase and a second expansion mixture in a liquid phase. The first expansion mixture is condensed in a first condenser and the second expansion mixture is introduced into a first distillation column and separated therein, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed in the first condenser.Type: GrantFiled: August 20, 2020Date of Patent: January 3, 2023Assignee: Röhm GmbHInventors: Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
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Publication number: 20220356282Abstract: A process can be used for producing optical molding materials on the basis of methyl methacrylate (MMA). The MMA produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. An optimized workup of the reactor output from the oxidative esterification of methacrolein can be used for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands are placed on plant apparatus configuration.Type: ApplicationFiled: July 22, 2022Publication date: November 10, 2022Applicant: Röhm GmbHInventors: Steffen KRILL, Belaid Ait Aissa, Florian Zschunke, Gerhard Kõlbl, Rüdiger Carloff
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Publication number: 20220332674Abstract: A process for producing alkyl methacrylates, in particular methyl methacrylate (MMA), includes production of methacrolein (MAL) in a first reaction stage; direct oxidative esterification (DOE) of the methacrolein with an alcohol, preferably methanol, to afford an alkyl methacrylate in a second reaction stage; and workup of the alkyl methacrylate crude product from the second reaction stage. An optimized workup of the reactor output from the oxidative esterification of methacrolein involves minimizing the amount of employed water, the amount of employed acid, and/or the amount of aqueous waste streams, through an optimized recycling of the generated process water streams.Type: ApplicationFiled: September 15, 2020Publication date: October 20, 2022Applicant: Röhm GmbHInventors: Florian Zschunke, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
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Patent number: 11472762Abstract: A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.Type: GrantFiled: June 10, 2020Date of Patent: October 18, 2022Assignee: Röhm GmbHInventors: Steffen Krill, Andreas Rühling, Florian Zschunke
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Publication number: 20220298094Abstract: A process and a preparation plant prepares methacrolein from formaldehyde and propionaldehyde, in presence of water and a homogeneous catalyst based at least on an acid and a base. A reaction mixture is introduced into a methacrolein workup plant and separated in a first distillation column, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed and, in a first phase separator, the organic phase and the aqueous phase of the condensate are separated from one another. The aqueous phase is introduced into a second distillation column, that is not part of the methacrolein workup plant, and is separated into a third distillation mixture in a gas phase at the top and a fourth distillation mixture at the bottom. The third distillation mixture is introduced into the methacrolein workup plant.Type: ApplicationFiled: August 20, 2020Publication date: September 22, 2022Applicant: Röhm GmbHInventors: Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
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Publication number: 20220289656Abstract: A process and a preparation plant can prepare methacrolein from formaldehyde and propionaldehyde in the presence of a homogeneous catalyst mixture based at least on an acid and a base. For a good workup of the reaction mixture leaving the reactor, with a good energy balance and where the process has simplified apparatus implementation, the liquid reaction mixture under pressure is expanded in an expansion vessel and separated into a first expansion mixture in a gas phase and a second expansion mixture in a liquid phase. The first expansion mixture is condensed in a first condenser and the second expansion mixture is introduced into a first distillation column and separated therein, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed in the first condenser.Type: ApplicationFiled: August 20, 2020Publication date: September 15, 2022Applicant: Röhm GmbHInventors: Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
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Patent number: 11427664Abstract: A process is useful for producing optical molding materials on the basis of methyl methacrylate (MMA), wherein this MMA has been produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. In particular, an optimized workup of the reactor output from the oxidative esterification of methacrolein is useful for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands than described in related art are placed on plant apparatus configuration.Type: GrantFiled: August 20, 2018Date of Patent: August 30, 2022Assignee: Röhm GmbHInventors: Steffen Krill, Belaid Ait Aissa, Florian Zschunke, Gerhard Kölbl, Rüdiger Carloff
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Publication number: 20220204436Abstract: A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.Type: ApplicationFiled: June 10, 2020Publication date: June 30, 2022Applicant: Röhm GmbHInventors: Steffen Krill, Andreas Rühling, Florian Zschunke
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Patent number: 11299449Abstract: A process for preparing methyl methacrylate by direct oxidative esterification of methacrolein has elevated yields compared to known processes. Methyl methacrylate (MMA) is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA), which can be produced by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic, and environmentally friendly processes for preparing methyl methacrylate. A superior workup of the reactor output from the oxidative esterification of methacrolein allows specific by-products to be isolated and then additionally converted to alkyl methacrylates, especially to MMA.Type: GrantFiled: June 7, 2019Date of Patent: April 12, 2022Assignee: Röhm GmbHInventors: Steffen Krill, Florian Zschunke, Belaid Ait Aissa, Marcel Treskow
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Patent number: 11124471Abstract: The present invention relates to a novel process for performing a heterogeneously catalyzed reaction for oxidative esterification of aldehydes to give carboxylic esters. Against this background, it has been possible by the present process according to the invention to perform such processes for longer periods without disruption, with constant or even increased activities and selectivities. This gives rise to the possibility of performing such processes in a very simple, economically viable and environmentally benign manner.Type: GrantFiled: April 23, 2018Date of Patent: September 21, 2021Assignee: Roehm GmbHInventors: Alexander Lygin, Steffen Krill, Belaid Ait Aissa, Florian Zschunke
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Publication number: 20210269385Abstract: A process for preparing methyl methacrylate by direct oxidative esterification of methacrolein has elevated yields compared to known processes. Methyl methacrylate (MMA) is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA), which can be produced by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic, and environmentally friendly processes for preparing methyl methacrylate. A superior workup of the reactor output from the oxidative esterification of methacrolein allows specific by-products to be isolated and then additionally converted to alkyl methacrylates, especially to MMA.Type: ApplicationFiled: June 7, 2019Publication date: September 2, 2021Applicant: Röhm GmbHInventors: Steffen Krill, Florian Zschunke, Belaid Ait Aissa, Marcel Treskow
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Publication number: 20210047259Abstract: The present invention relates to a novel process for performing a heterogeneously catalyzed reaction for oxidative esterification of aldehydes to give carboxylic esters. Against this background, it has been possible by the present process according to the invention to perform such processes for longer periods without disruption, with constant or even increased activities and selectivities. This gives rise to the possibility of performing such processes in a very simple, economically viable and environmentally benign manner.Type: ApplicationFiled: April 23, 2018Publication date: February 18, 2021Applicant: Roehm GmbHInventors: Alexander LYGIN, Steffen KRILL, Belaid AIT AISSA, Florian ZSCHUNKE
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Publication number: 20210032386Abstract: A process is useful for producing optical molding materials on the basis of methyl methacrylate (MMA), wherein this MMA has been produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. In particular, an optimized workup of the reactor output from the oxidative esterification of methacrolein is useful for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands than described in related art are placed on plant apparatus configuration.Type: ApplicationFiled: August 20, 2018Publication date: February 4, 2021Applicant: Röhm GmbHInventors: Steffen Krill, Belaid Ait Aissa, Florian Zschunke, Gerhard Kölbl, Rüdiger Carloff
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Publication number: 20140041548Abstract: The present invention relates to a process for producing SiO2 mouldings, comprising the preparation of a free-flowing aqueous SiO2 composition, solidification of the aqueous SiO2 composition and drying of the solidified SiO2 composition, wherein the aqueous SiO2 composition is a self-assembly composition. The present invention further relates to a moulding obtainable by the process according to the invention.Type: ApplicationFiled: February 14, 2012Publication date: February 13, 2014Applicant: EVONIK DEGUSSA GMBHInventors: Jürgen Erwin Lang, Maciej Olek, Hartwig Rauleder, Bodo Frings, Rüdiger Schütte, Georg Borchers, Georg Markowz, Florian Zschunke