Patents by Inventor Stefan Rittinger
Stefan Rittinger 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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Publication number: 20240010597Abstract: A process for the preparation of a color stable C6-12 saturated aliphatic carboxylic acid in which (1) the corresponding aldehyde is oxidized with molecular oxygen to obtain the crude saturated aliphatic carboxylic acid in a liquid mixture, (2) molecular oxygen removed from the crude saturated aliphatic carboxylic acid mixture, and (3) the saturated aliphatic carboxylic acid separated from the molecular oxygen depleted mixture by distillation as a color stable product.Type: ApplicationFiled: August 9, 2021Publication date: January 11, 2024Inventors: Jessica Nadine HAMANN, Joaquim Henrique TELES, Peter Georg OHLEMUELLER, Friedemann GAITZSCH, Shelue LIANG, Stefan RITTINGER, Frauke THRUN, Richard DEHN
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Publication number: 20230391542Abstract: A container and a process for the degradation stable storage and transport of a liquid comprising a saturated aliphatic C6-12 carboxylic acid in which the liquid is covered with an oxygen free or at least heavily oxygen depleted inert gas phase atmosphere above the liquid.Type: ApplicationFiled: October 12, 2021Publication date: December 7, 2023Inventors: Joaquim Henrique TELES, Jessica Nadine HAMANN, Shelue LIANG, Stefan RITTINGER
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Patent number: 10450252Abstract: Process for the continuous hydrogenation of a carboxylic acid (I) to an alcohol (II) by means of hydrogen at a temperature of from 100 to 300° C. and a pressure of 10 to 33 MPa abs in a reactor tube through which axial flow occurs and which has a fixed-bed catalyst which is fixed therein and comprises at least one element from the group consisting of Re, Co and Cu, and in which the carboxylic acid (I) to be hydrogenated is present in a liquid mixture (III) comprising the carboxylic acid (I), water and alcohol (II), where the mixture (III) has an acid number of from 0.2 to 25 mg KOH/g and comprises at least 15% by weight of water and at least 20% by weight of alcohol (II) and the flow velocity of the flowing liquid calculated on the basis of the geometric cross-sectional area of the empty, catalyst-free reactor tube is from 10 to 50 m/h.Type: GrantFiled: March 29, 2017Date of Patent: October 22, 2019Assignee: BASF SEInventors: Rolf Pinkos, Stefan Rittinger, Christoph Nuebling, Olivier Abillard
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Publication number: 20190112245Abstract: Process for the continuous hydrogenation of a carboxylic acid (I) to an alcohol (II) by means of hydrogen at a temperature of from 100 to 300° C. and a pressure of 10 to 33 MPa abs in a reactor tube through which axial flow occurs and which has a fixed-bed catalyst which is fixed therein and comprises at least one element from the group consisting of Re, Co and Cu, and in which the carboxylic acid (I) to be hydrogenated is present in a liquid mixture (Ill) comprising the carboxylic acid (I), water and alcohol (II), where the mixture (Ill) has an acid number of from 0.2 to 25 mg KOH/g and comprises at least 15% by weight of water and at least 20% by weight of alcohol (II) and the flow velocity of the flowing liquid calculated on the basis of the geometric cross-sectional area of the empty, catalyst-free reactor tube is from 10 to 50 m/h.Type: ApplicationFiled: March 29, 2017Publication date: April 18, 2019Inventors: Rolf PINKOS, Stefan RITTINGER, Christoph NUEBLING, Olivier ABILLARD
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Patent number: 9556136Abstract: A process for the distillation of a mixture which consists to at least 90% by weight of a cyclic N-vinylamide and which comprises a stabilizer, wherein a polyether is added to the mixture before or during distillation and a product is obtained which consists to at least 99.5% by weight of the cyclic N-vinylamide.Type: GrantFiled: March 19, 2015Date of Patent: January 31, 2017Assignee: BASF SEInventors: Stefan Rittinger, Regina Vogelsang, Pierre Fournier, Anirudh Acharya, Sonja Judat
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Patent number: 9428438Abstract: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which, in step (a), a liquid stream comprising formic acid, methanol, water and tertiary amine (I) is produced by combining methyl formate, water and tertiary amine (I), from there in step (b), methanol is separated off and in step (c), formic acid is removed by distillation from the liquid stream obtained in a distillation apparatus, wherein, when methyl formate, water and tertiary amine (I) are combined, methyl formate, water and optionally tertiary amine (I) are first introduced in step (a1) in a molar ratio of 0?n(amine to a1)/n(mefo to a1)?0.1, and from 70 to 100% of the hydrolysis equilibrium possible is set and then, in step (a2), tertiary amine (I) is introduced in a molar ratio of 0.1?n(amine to a2)/n(mefo to a1)?2, and the mixture is reacted.Type: GrantFiled: November 25, 2013Date of Patent: August 30, 2016Assignee: BASF SEInventors: Donata Maria Fries, Klaus-Dieter Mohl, Martin Schäfer, Daniel Schneider, Peter Bassler, Stefan Rittinger, Joaquim Henrique Teles
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Publication number: 20150307466Abstract: A process for the distillation of a mixture which consists to at least 90% by weight of a cyclic N-vinylamide and which comprises a stabilizer, wherein a polyether is added to the mixture before or during distillation and a product is obtained which consists to at least 99.5% by weight of the cyclic N-vinylamide.Type: ApplicationFiled: March 19, 2015Publication date: October 29, 2015Applicant: BASF SEInventors: Stefan RITTINGER, Regina VOGELSANG, Pierre FOURNIER, Anirudh ACHARYA, Sonja JUDAT
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Patent number: 8957244Abstract: Process for preparing methyl formate by carbonylation of methanol by means of carbon monoxide in a carbonylation reactor in the presence of a catalyst system comprising alkali metal formate and alkali metal alkoxide to give a reaction mixture (RM) which comprises methyl formate, alkali metal formate, alkali metal alkoxide and possibly unreacted methanol and unreacted carbon monoxide and is taken from the carbonylation reactor, wherein the reaction mixture (RM) comprises at least 0.5% by weight of alkali metal alkoxide based on the total weight of the reaction mixture (RM) and the molar ratio of alkali metal formate to alkali metal alkoxide in the reaction mixture (RM) is greater than 1.Type: GrantFiled: November 25, 2013Date of Patent: February 17, 2015Assignee: BASF SEInventors: Daniel Schneider, Klaus-Dieter Mohl, Martin Schäfer, Jürgen Paschold, Joaquim Henrique Teles, Stefan Rittinger
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Patent number: 8933277Abstract: A process is provided for recovering components from a low boiler mixture which is obtained in the distillation of hydrogenation effluents from the preparation of polymethylols, by multistage distillation of the low boiler mixture having a tertiary amine, water, methanol, a polymethylol, a methylolalkanal, an alcohol and an alkanal with a methylene group in the alpha position to the carbonyl group. A first distillation stage involves separating the low boiler mixture into a higher-boiling, predominantly water-rich fraction and into a lower-boiling aqueous organic fraction having the tertiary amine. A second distillation stage involves separating the aqueous organic fraction from the first distillation stage into a predominantly amine-containing fraction and a further amine-depleted fraction. The tertiary amine is trimethylamine or triethylamine and the bottom temperature in the second distillation stage is at least 110° C.Type: GrantFiled: January 7, 2010Date of Patent: January 13, 2015Assignee: BASF SEInventors: Stephan Schlitter, Michael Steiniger, Stefan Rittinger, Tilman Sirch, Steffen Maas
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Patent number: 8901350Abstract: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid and a tertiary amine (I) in a molar ratio of from 0.5 to 5 is produced by combining tertiary amine (I) and a formic acid source, from 10 to 100% by weight of the secondary components present therein are separated off and formic acid is removed by distillation in a distillation apparatus at a bottom temperature of from 100 to 300° C. and a pressure of from 30 to 3000 hPa abs from the liquid stream obtained, the bottom discharge from the distillation apparatus being separated into two liquid phases and the upper liquid phase being recycled to the formic acid source and the lower liquid phase being recycled for separating off the secondary components and/or to the distillation apparatus.Type: GrantFiled: June 29, 2011Date of Patent: December 2, 2014Assignee: BASF SEInventors: Daniel Schneider, Klaus-Dieter Mohl, Martin Schäfer, Karin Pickenäcker, Stefan Rittinger, Thomas Schaub, Joaquim Henrique Teles, Rocco Paciello, Gerd Kaibel
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Patent number: 8889905Abstract: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid and tertiary amine (I) is produced by combining tertiary amine (I) and a formic acid source, secondary components comprised therein are separated off, formic acid is removed by distillation from the resulting liquid stream in a distillation apparatus, where the bottom output from the distillation apparatus is separated into two liquid phases, and the upper liquid phase is recirculated to the formic acid source and the lower liquid phase is recirculated to the separation of the secondary components and/or to the distillation apparatus, wherein low boilers are removed by distillation from the upper liquid phase and recirculated to the depleted stream.Type: GrantFiled: December 20, 2012Date of Patent: November 18, 2014Assignee: BASF SEInventors: Peter Bassler, Stefan Rittinger, Daniel Schneider, Donata Maria Fries, Klaus-Dieter Mohl, Joaquim Henrique Teles, Martin Schäfer, Jürgen Paschold
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Patent number: 8884076Abstract: The present invention relates to a process for distilling an aqueous polymethylol mixture which comprises a polymethylol of the formula (I) (HOCH2)2—C—R2??(I) in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, a tertiary amine, water and the adduct of tertiary amine and formic acid (amine formate), which comprises performing the distillation in a distillation column which is connected at the bottom to an evaporator, the bottom temperature being above the evaporation temperature of the monoester of formic acid and polymethylol (polymethylol formate) which forms during distillation. The present invention further relates to a composition comprising polymethylol and 1 to 10 000 ppm by weight of polymethylol formate, and to the use thereof.Type: GrantFiled: December 7, 2009Date of Patent: November 11, 2014Assignee: BASF SEInventors: Tilman Sirch, Michael Steiniger, Steffen Maas, Stefan Rittinger, Stephan Schlitter
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Patent number: 8877965Abstract: A process for preparing formic acid by reaction of carbon dioxide (1) with hydrogen (2) in a hydrogenation reactor (I) in the presence of a catalyst comprising an element of group 8, 9 or 10 of the Periodic Table, a tertiary amine comprising at least 12 carbon atoms per molecule and a polar solvent comprising one or more monoalcohols selected from among methanol, ethanol, propanols and butanols, to form formic acid/amine adducts as intermediates which are subsequently thermally dissociated, where the work-up of the output (3) from the hydrogenation reactor (I) is carried out by addition of water so as to increase the distribution coefficient of the catalyst between the upper phase (4) and the lower phase.Type: GrantFiled: June 29, 2011Date of Patent: November 4, 2014Assignee: BASF SEInventors: Thomas Schaub, Donata Maria Fries, Rocco Paciello, Klaus-Dieter Mohl, Martin Schäfer, Stefan Rittinger, Daniel Schneider
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Patent number: 8835683Abstract: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid, tertiary amine (I) and water is produced by combining tertiary amine (I) and a formic acid source in the presence of water, water and organic decomposition products of the tertiary amine (I) are removed and formic acid is removed by distillation from the resulting liquid stream in a distillation apparatus, wherein the stream comprising water and organic decomposition products of the tertiary amine (I) which have been separated off is separated into two liquid phases, the upper liquid phase is removed and the lower, water-comprising liquid phase is recirculated to the formic acid source.Type: GrantFiled: December 20, 2012Date of Patent: September 16, 2014Assignee: BASF SEInventors: Daniel Schneider, Klaus-Dieter Mohl, Martin Schäfer, Donata Maria Fries, Joaquim Henrique Teles, Peter Bassler, Stefan Rittinger, Thomas Schaub
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Patent number: 8791297Abstract: A process for preparing formic acid by reaction of carbon dioxide (1) with hydrogen (2) in a hydrogenation reactor (I) in the presence of a catalyst comprising an element of group 8, 9 or 10 of the Periodic Table, a tertiary amine comprising at least 12 carbon atoms per molecule and a polar solvent comprising one or more monoalcohols selected from among methanol, ethanol, propanols and butanols and also water, to form formic acid/amine adducts as intermediates which are subsequently thermally dissociated, with work-up of the output (3) from the hydrogenation reactor (I) in a plurality of process steps, where a tertiary amine-comprising stream (13) from the work-up is used as selective solvent for the catalyst, is proposed.Type: GrantFiled: June 29, 2011Date of Patent: July 29, 2014Assignee: BASF SEInventors: Thomas Schaub, Donata Maria Fries, Rocco Paciello, Klaus-Dieter Mohl, Martin Schäfer, Stefan Rittinger, Daniel Schneider
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Publication number: 20140148617Abstract: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which, in step (a), a liquid stream comprising formic acid, methanol, water and tertiary amine (I) is produced by combining methyl formate, water and tertiary amine (I), from there in step (b), methanol is separated off and in step (c), formic acid is removed by distillation from the liquid stream obtained in a distillation apparatus, wherein, when methyl formate, water and tertiary amine (I) are combined, methyl formate, water and optionally tertiary amine (I) are first introduced in step (a1) in a molar ratio of 0?n(amine to a1)/n(mefo to a1)?0.1, and from 70 to 100% of the hydrolysis equilibrium possible is set and then, in step (a2), tertiary amine (I) is introduced in a molar ratio of 0.1?n(amine to a2)/n(mefo to a1)?2, and the mixture is reacted.Type: ApplicationFiled: November 25, 2013Publication date: May 29, 2014Applicant: BASF SEInventors: Donata Maria Fries, Klaus-Dieter Mohl, Martin Schäfer, Daniel Schneider, Peter Bassler, Stefan Rittinger, Joaquim Henrique Teles
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Publication number: 20140148614Abstract: Process for preparing methyl formate by carbonylation of methanol by means of carbon monoxide in a carbonylation reactor in the presence of a catalyst system comprising alkali metal formate and alkali metal alkoxide to give a reaction mixture (RM) which comprises methyl formate, alkali metal formate, alkali metal alkoxide and possibly unreacted methanol and unreacted carbon monoxide and is taken from the carbonylation reactor, wherein the reaction mixture (RM) comprises at least 0.5% by weight of alkali metal alkoxide based on the total weight of the reaction mixture (RM) and the molar ratio of alkali metal formate to alkali metal alkoxide in the reaction mixture (RM) is greater than 1.Type: ApplicationFiled: November 25, 2013Publication date: May 29, 2014Applicant: BASF SEInventors: Daniel Schneider, Klaus-Dieter Mohl, Martin Schäfer, Jürgen Paschold, Joaquim Henrique Teles, Stefan Rittinger
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Patent number: 8575401Abstract: The present invention relates to a process for purifying crude polymethylol which comprises polymethylol of the formula (I) (HOCH2)2—C—R2??(I) in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, and also hydroxy acid of the formula (IV) in which each R is independently as defined above, which comprises performing the purification in a distillation column, the bottom of the distillation column being connected to an evaporator with a short residence time. The present invention further relates to a composition comprising polymethylol and 1 to 10 000 ppm by weight of an ester of polymethylol and of a hydroxy acid and to the use thereof.Type: GrantFiled: December 7, 2009Date of Patent: November 5, 2013Assignee: BASF SEInventors: Tilman Sirch, Michael Steiniger, Steffen Maas, Stefan Rittinger
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Publication number: 20130190532Abstract: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid, tertiary amine (I) and water is produced by combining tertiary amine (I) and a formic acid source in the presence of water, water and organic decomposition products of the tertiary amine (I) are removed and formic acid is removed by distillation from the resulting liquid stream in a distillation apparatus, wherein the stream comprising water and organic decomposition products of the tertiary amine (I) which have been separated off is separated into two liquid phases, the upper liquid phase is removed and the lower, water-comprising liquid phase is recirculated to the formic acid source.Type: ApplicationFiled: December 20, 2012Publication date: July 25, 2013Applicant: BASF SEInventors: Daniel Schneider, Klaus-Dieter Mohl, Martin Schäfer, Donata Maria Fries, Joaquim Henrique Teles, Peter Bassler, Stefan Rittinger, Thomas Schaub
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Patent number: 8426641Abstract: Process for preparing formic acid by hydrogenation of carbon dioxide in the presence of a catalyst comprising an element of group 8, 9 or 10 of the Periodic Table, a tertiary amine and a polar solvent at a pressure of from 0.2 to 30 MPa abs and a temperature of from 20 to 200° C. to form two liquid phases, separation of the two liquid phases, wherein the liquid phase (B) enriched with the tertiary amine is recirculated to the hydrogenation reactor and the formic acid/amine adduct from the liquid phase (A) enriched with the formic acid/amine adduct and the polar solvent is thermally dissociated into free formic acid and free tertiary amine in a distillation unit and the tertiary amine liberated in the dissociation and the polar solvent are recirculated to the hydrogenation reactor.Type: GrantFiled: June 25, 2010Date of Patent: April 23, 2013Assignee: BASF SEInventors: Thomas Schaub, Rocco Paciello, Klaus-Dieter Mohl, Daniel Schneider, Martin Schaefer, Stefan Rittinger