Patents by Inventor Mirko Händel
Mirko Händel 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: 10941087Abstract: The invention relates to a method for preferably adiabatic nitration of nitratable aromatic organic compounds (aromatics) and to a corresponding plant, in particular a production plant (nitration plant) for carrying out said method.Type: GrantFiled: December 14, 2017Date of Patent: March 9, 2021Inventors: Jürgen Pöhlmann, Heinrich Hermann, Mirko Händel, Sophie Wernitz, Stefan Fankel
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Publication number: 20200017421Abstract: The invention relates to a method for preferably adiabatic nitration of nitratable aromatic organic compounds (aromatics) and to a corresponding plant, in particular a production plant (nitration plant) for carrying out said method.Type: ApplicationFiled: December 14, 2017Publication date: January 16, 2020Applicant: Josef Meissner GmbH & Co. KGInventors: Dr. Jürgen PÖHLMANN, Dr. Heinrich HERMANN, Dr. Mirko HÄNDEL, Sophie WERNITZ, Stefan FANKEL
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Patent number: 10513486Abstract: The invention relates to a method and to a device for removing contaminants arising during the production of aliphatic or alicyclic nitric acid esters, in particular for removing contaminants from nitrated crude nitric acid esters, which nitrated crude nitric acid esters arise during the nitration of monovalent or multivalent aliphatic or alicyclic alcohols capable of nitration, after the separation of the final nitrating acid, and to a production system for nitrating monovalent or multivalent aliphatic alcohols capable of nitration with subsequent purification of the nitrated nitric acid esters.Type: GrantFiled: August 14, 2019Date of Patent: December 24, 2019Assignee: Josef Meissner GmbH & Co. KGInventors: Jürgen Pöhlmann, Heinrich Hermann, Mïrko Händel, Jürgen Gebauer
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Publication number: 20190367441Abstract: The invention relates to a method and to a device for removing contaminants arising during the production of aliphatic or alicyclic nitric acid esters, in particular for removing contaminants from nitrated crude nitric acid esters, which nitrated crude nitric acid esters arise during the nitration of monovalent or multivalent aliphatic or alicyclic alcohols capable of nitration, after the separation of the final nitrating acid, and to a production system for nitrating monovalent or multivalent aliphatic alcohols capable of nitration with subsequent purification of the nitrated nitric acid esters.Type: ApplicationFiled: August 14, 2019Publication date: December 5, 2019Applicant: Josef Meissner GmbH & Co. KGInventors: Jürgen Pöhlmann, Heinrich Hermann, Mïrko Händel, Jürgen Gebauer
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Publication number: 20180362442Abstract: The invention relates to a method and to a device for removing contaminants arising during the production of aliphatic or alicyclic nitric acid esters, in particular for removing contaminants from nitrated crude nitric acid esters, which nitrated crude nitric acid esters arise during the nitration of monovalent or multivalent aliphatic or alicyclic alcohols capable of nitration, after the separation of the final nitrating acid, and to a production system for nitrating monovalent or multivalent aliphatic alcohols capable of nitration with subsequent purification of the nitrated nitric acid esters.Type: ApplicationFiled: March 20, 2018Publication date: December 20, 2018Applicant: Josef Meissner GmbH & Co. KGInventors: Jürgen Pöhlmann, Heinrich Hermann, Mïrko Händel, Jürgen Gebauer
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Patent number: 10125088Abstract: The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).Type: GrantFiled: July 10, 2017Date of Patent: November 13, 2018Assignee: Josef Meissner GmbH & Co. KGInventors: Jürgen Pöhlmann, Heinrich Hermann, Mirko Händel, Jürgen Gebauer, Tim Bergmann
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Publication number: 20170305835Abstract: The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).Type: ApplicationFiled: July 10, 2017Publication date: October 26, 2017Applicant: Josef Meissner GmbH & Co. KGInventors: Dr. Jürgen PÖHLMANN, Dr. Heinrich HERMANN, Dr. Mirko HÄNDEL, Jürgen GEBAUER, Tim BERGMANN
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Patent number: 9738592Abstract: The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).Type: GrantFiled: April 30, 2015Date of Patent: August 22, 2017Assignee: Josef Meissner GmbH & Co. KGInventors: Jürgen Pöhlmann, Heinrich Hermann, Mirko Händel, Jürgen Gebauer, Tim Bergmann
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Patent number: 9688606Abstract: Process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS-II), wherein i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture, ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of thType: GrantFiled: October 22, 2014Date of Patent: June 27, 2017Assignees: BASF SE, Josef Meissner GmbH & Co. KGInventors: Samuel Neto, Rüdiger Fritz, Renate Hempel, Holger Allardt, Yuan Shen Dai, Barbara Becker, Sebastian Ahrens, Julia Leschinski, Henrich Hermann, Mirko Haendel, Jürgen Pöhlmann
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Publication number: 20170166514Abstract: The present invention relates to a method for purifying raw dinitrotoluenes resulting from dinitration of toluene in the presence of a nitric acid/sulfuric acid/nitrating acid mixture, and a device or plant for performing the method, and a corresponding production plant for producing dinitrotoluene, characterized in that (a) the raw dinitrotoluenes are first subjected to a wash with at least one washing medium after separation of the nitrating acid mixture, followed by a separation of the washing medium; and that (b) subsequently the washed dinitrotoluenes resulting from method step (a) are subjected to stripping (stripping gas treatment) with at least one gas (stripping gas).Type: ApplicationFiled: April 30, 2015Publication date: June 15, 2017Inventors: Dr. Jürgen PÖHLMANN, Dr. Heinrich HERMANN, Dr. Mirko HÄNDEL, Jürgen GEBAUER, Tim BERGMANN
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Patent number: 9540313Abstract: The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.Type: GrantFiled: February 26, 2015Date of Patent: January 10, 2017Assignee: Josef Meissner GmbH & Co. KGInventors: Jürgen Pöhlmann, Heinrich Hermann, Mirko Händel, Jürgen Gebauer
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Publication number: 20160251302Abstract: Process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS-II), wherein i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture, ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of tType: ApplicationFiled: October 22, 2014Publication date: September 1, 2016Inventors: SAMUEL NETO, Rüdiger FRITZ, Renate HEMPEL, Holger ALLARDT, Yuan Shen DAI, Barbara BECKER, Sebastian AHRENS, Julia LESCHINSKI, Henrich HERMANN, Mirko HAENDEL, Jürgen PÖHLMANN
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Patent number: 9249083Abstract: The invention relates to a process for scrubbing a crude mixture comprising dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid obtained in the nitration of toluene after the nitrating acid has been separated off, which comprises two scrubbing steps (SS-I) and (SS-II), wherein i) in a first scrubbing step (SS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-I-1) of the first scrubbing step (SS-I) has a total acid content of from 20 to 40% by weight and a prescrubbed crude mixture is obtained, ii) in a second scrubbing step (SS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-II-1) of the second scrubbing step (SS-II) has a pH of lessType: GrantFiled: April 25, 2013Date of Patent: February 2, 2016Assignees: BASF SE, Josef Meissner GmbH & Co. KGInventors: Samuel Neto, Ruediger Fritz, Renate Hempel, Holger Allardt, Barbara Becker, Julia Leschinski, Sebastian Ahrens, Heinrich Hermann, Mirko Haendel, Juergen Poehlmann
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Publication number: 20150174551Abstract: The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.Type: ApplicationFiled: February 26, 2015Publication date: June 25, 2015Inventors: Jürgen PÖHLMANN, Mirko HÄNDEL, Jürgen GEBAUER, Heinrich HERMANN
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Patent number: 7632960Abstract: The present invention relates to a process for the preparation of nitric esters of monohydric alcohols wherein a monohydric alcohol or a mixture of monohydric alcohols is converted with nitric acid to the corresponding nitric esters under adiabatic reaction conditions in the presence of sulfuric acid.Type: GrantFiled: November 20, 2006Date of Patent: December 15, 2009Inventors: Jürgen Pöhlmann, Frank Pottharst, Heinrich Hermann, Peter Konieczny, Mirko Händel, Jürgen Gebauer
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Patent number: 7470826Abstract: The invention relates to a process for removing and recovering nitrating acid mixtures, in particular nitric acid, sulphuric acid and oxides of nitrogen, from the nitrated crude products occurring in the nitration of nitratable aromatic compounds after the nitrating acid has been separated off, by acidic scrubbing by means of a multistage extraction process, the extraction process comprising a cross-current extraction with downstream countercurrent extraction. The process permits essentially complete recovery of the abovementioned acids, including the oxides of nitrogen, in high concentrations, so that they can be recycled to the nitration and no longer pollute the wastewater.Type: GrantFiled: October 16, 2006Date of Patent: December 30, 2008Assignee: Josef Meissner GmbH & Co. KGInventors: Heinrich Hermann, Jürgen Gebauer, Peter Konieczny, Mirko Händel