Patents by Inventor Peter Plathen
Peter Plathen 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: 11365172Abstract: The invention relates to a method for operating a production plant for producing a chemical product (1) by reacting a H-functional reactant (2) with phosgene (3) during an interruption in production when taking at least one plant part of the production plant out of operation, wherein low-oxygen and oxygen-rich phosgene-containing exhaust gas flows are directed separately from one another in different phosgene decomposition directions and separately from one another—at spatially different points—into a combustion device, wherein plant parts that have not been taken out of operation are operated in a closed-circuit operating mode. The invention also relates to a production plant for producing a chemical product by reacting H-functional reactants with phosgene, which is suitable for being operated with the method according to the invention.Type: GrantFiled: June 29, 2018Date of Patent: June 21, 2022Assignee: Covestro Deutschland AGInventors: Juergen Spriewald, Thomas Knauf, Dirk Manzel, Peter Plathen
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Patent number: 11213867Abstract: The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phosgene residues with a continuous increase in temperature until a maximum temperature ranging between 30° C. to 120° C. is reached; once the maximum temperature is reached, shutting down the ammonia supply and the conveying of inert gas, optionally followed by washing the apparatus with an aqueous stream.Type: GrantFiled: September 3, 2018Date of Patent: January 4, 2022Assignee: Covestro Deutschland AGInventors: Dirk Manzel, Peter Plathen, Peter Wolf, Udo Boegel
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Publication number: 20210147346Abstract: The invention relates to a method for operating a production plant for producing a chemical product (1) by reacting a H-functional reactant (2) with phosgene (3) during an interruption in production when taking at least one plant part of the production plant out of operation, wherein low-oxygen and oxygen-rich phosgene-containing exhaust gas flows are directed separately from one another in different phosgene decomposition directions and separately from one another—at spatially different points—into a combustion device, wherein plant parts that have not been taken out of operation are operated in a closed-circuit operating mode. The invention also relates to a production plant for producing a chemical product by reacting H-functional reactants with phosgene, which is suitable for being operated with the method according to the invention.Type: ApplicationFiled: June 29, 2018Publication date: May 20, 2021Inventors: Juergen Spriewald, Thomas Knauf, Dirk Manzel, Peter Plathen
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Patent number: 10947187Abstract: The invention relates to a method for producing methylene-diphenylene-diisocyanate and optionally a mixture of methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, wherein, in a step ?), a fraction (142) containing a methylene-diphenylene-diisocyanate and secondary components is provided, optionally via a step ?.1), the separating of methylene-diphenylene-diisocyanate and secondary components from a fraction (100) containing methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, and wherein, in a step ?), the fraction (142) containing methylene-diphenylene-diisocyanate and secondary components is subjected to a purification comprising an isomer separation by distillation and/or crystallization in two or more sub-steps (a, b, . . . ), obtaining two or more methylene-diphenylene-diisocyanate-reinfractions (140-1, 140-2, . . .Type: GrantFiled: January 2, 2019Date of Patent: March 16, 2021Assignee: Covestro Intellectual Property GmbH & Co. KGInventors: Thomas Knauf, Peter Plathen, Dirk Manzel, Stefan Wershofen
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Publication number: 20200331848Abstract: The invention relates to a method for producing methylene-diphenylene-diisocyanate and optionally a mixture of methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, wherein, in a step ?), a fraction (142) containing a methylene-diphenylene-diisocyanate and secondary components is provided, optionally via a step ?.1), the separating of methylene-diphenylene-diisocyanate and secondary components from a fraction (100) containing methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, and wherein, in a step ?), the fraction (142) containing methylene-diphenylene-diisocyanate and secondary components is subjected to a purification comprising an isomer separation by distillation and/or crystallization in two or more sub-steps (a, b, . . . ), obtaining two or more methylene-diphenylene-diisocyanate-reinfractions (140-1, 140-2, . . .Type: ApplicationFiled: January 2, 2019Publication date: October 22, 2020Inventors: Thomas Knauf, Peter Plathen, Dirk Manzel, Stefan Wershofen
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Publication number: 20200246845Abstract: The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phosgene residues with a continuous increase in temperature until a maximum temperature ranging between 30° C. to 120° C. is reached; once the maximum temperature is reached, shutting down the ammonia supply and the conveying of inert gas, optionally (and preferably) followed by washing the apparatus with an aqueous stream.Type: ApplicationFiled: September 3, 2018Publication date: August 6, 2020Inventors: Dirk Manzel, Peter Plathen, Peter Wolf, Udo Boegel
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Patent number: 10577311Abstract: The invention relates to a method for an economically and technically improved embodiment of a production interruption in a production method for isocyanates by phosgenation of the corresponding amines, in which the entire production plant is not closed while one or more parts of the plant is taken out of operation, rather the input materials and/or reaction products available in the production plant are recirculated through at least one part of the plant that has not been taken out of operation. The invention further relates to a plant for producing isocyanates and to a method for operating a plant for producing isocyanates.Type: GrantFiled: September 20, 2016Date of Patent: March 3, 2020Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Dirk Manzel, Peter Plathen, Jürgen Spriewald
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Patent number: 10364214Abstract: The invention relates to a method for producing isocyanates, according to which exhaust flows provided for the combustion are guided through an adsorption device before being supplied into the exhaust gas combustion process, and are thereby depleted of solvent, the adsorption device comprising at least two adsorption units connected in parallel, which are alternately (i) exposed to the at least one exhaust flow and (ii) regenerated with water vapor, where, during method step (i), an exhaust flow depleted of solvent is obtained, and during method step (ii), a flow containing water and solvent is obtained, the solvent proportion of which is recycled into a method for producing isocyanates.Type: GrantFiled: August 29, 2017Date of Patent: July 30, 2019Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Dirk Manzel, Peter Plathen, Jürgen Spriewald
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Publication number: 20190210961Abstract: The invention relates to a method for producing isocyanates, according to which exhaust flows provided for the combustion are guided through an adsorption device before being supplied into the exhaust gas combustion process, and are thereby depleted of solvent, the adsorption device comprising at least two adsorption units connected in parallel, which are alternately (i) exposed to the at least one exhaust flow and (ii) regenerated with water vapour, where, during method step (i), an exhaust flow depleted of solvent is obtained, and during method step (ii), a flow containing water and solvent is obtained, the solvent proportion of which is recycled into a method for producing isocyanates.Type: ApplicationFiled: August 29, 2017Publication date: July 11, 2019Inventors: Thomas KNAUF, Dirk MANZEL, Peter PLATHEN, Jürgen SPRIEWALD
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Patent number: 10280135Abstract: The invention relates to a continuously operated method for producing isocyanates by reacting the corresponding amines with phosgene. When changing the target production capacity starting from a starting state with a specified production capacity and ending with an end state with a different production capacity, the current excess phosgene at the time of the transition period between the starting state and the end state, the change of the amine mass flow beginning during said time, is at least equal to and preferably greater than the excess phosgene during the production period when the production capacity is in the starting state prior to the beginning of the transition period; and the average excess phosgene during the transition period is greater than the excess phosgene during the production period when the production capacity is in the starting state prior to the beginning of the transition period.Type: GrantFiled: September 28, 2016Date of Patent: May 7, 2019Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Dirk Manzel, Peter Plathen, Stefan Wershofen
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Publication number: 20180290968Abstract: The invention relates to a method for an economically and technically improved embodiment of a production interruption in a production method for isocyanates by phosgenation of the corresponding amines, in which the entire production plant is not closed while one or more parts of the plant is taken out of operation, rather the input materials and/or reaction products available in the production plant are recirculated through at least one part of the plant that has not been taken out of operation. The invention further relates to a plant for producing isocyanates and to a method for operating a plant for producing isocyanates.Type: ApplicationFiled: September 20, 2016Publication date: October 11, 2018Inventors: Thomas Knauf, Dirk Manzel, Peter Plathen, Jürgen Spriewald
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Publication number: 20180265457Abstract: The invention relates to a continuously operated method for producing isocyanates by reacting the corresponding amines with phosgene. When changing the target production capacity starting from a starting state with a specified production capacity and ending with an end state with a different production capacity, the current excess phosgene at the time of the transition period between the starting state and the end state, the change of the amine mass flow beginning during said time, is at least equal to and preferably greater than the excess phosgene during the production period when the production capacity is in the starting state prior to the beginning of the transition period; and the average excess phosgene during the transition period is greater than the excess phosgene during the production period when the production capacity is in the starting state prior to the beginning of the transition period.Type: ApplicationFiled: September 28, 2016Publication date: September 20, 2018Inventors: Thomas Knauf, Dirk Manzel, Peter Plathen, Stefan Wershofen
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Patent number: 9796669Abstract: The invention relates to a method for preparing isocyanates by the phosgenation of the corresponding amines in which problems resulting from the formation of deposits in apparatuses of the reaction segment during activation (starting) and deactivation (termination) of the method can be prevented by processing measures, in particular ensuring that there is a surplus of phosgene relative to the phosgenating amine during the critical starting and termination steps of the method.Type: GrantFiled: March 24, 2015Date of Patent: October 24, 2017Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Andreas Karl Rausch, Charles Bjoerndahl, Matthias Ehlers, Peter Plathen, Carlos Alvarez Herrero, Francisco Munoz Velasco
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Publication number: 20170101368Abstract: The invention relates to a method for preparing isocyanates by the phosgenation of the corresponding amines in which problems resulting from the formation of deposits in apparatuses of the reaction segment during activation (starting) and deactivation (termination) of the method can be prevented by processing measures, in particular ensuring that there is a surplus of phosgene relative to the phosgenating amine during the critical starting and termination steps of the method.Type: ApplicationFiled: March 24, 2015Publication date: April 13, 2017Inventors: Thomas Knauf, Andreas Karl Rausch, Charles Bjoerndahl, Matthias Ehlers, Peter Plathen, Carlos Alvarez Herrero, Francisco Munoz Velasco