Patents by Inventor Thorsten Friese
Thorsten Friese 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: 9776940Abstract: A process for production of acrylic acid includes preparing a product gas mixture by a catalytic gas-phase oxidation of a C3 precursor; cooling and contacting the cooled product gas mixture in an absorption column having at least two cooling loops in countercurrent with an absorbent to obtain an absorbate A, containing the absorbent and absorbed acrylic acid; condensing a high boiler fraction of the product gas mixture in a first cooling loop; condensing a low boiler fraction of the product gas mixture in a second cooling loop; maintaining a temperature of the absorbate A in the second cooling loop at a value of at least 56° C.; removing an acid water stream comprising glyoxal from the absorption column at a side take-off located above the second cooling loop; and removing a stream F of absorbate A from the absorption column at a side take-off, located at a height of the absorption column between the first cooling loop and the second cooling loop.Type: GrantFiled: August 3, 2016Date of Patent: October 3, 2017Assignee: BASF SEInventors: Tobias Korn, Till Blum, Travis Carline, Christopher Fuchs, Darryl Welch, Peter Zurowski, Volker Schliephake, Steffen Rissel, Thorsten Friese, Ulrich Jaeger, Sylke Haremza
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Publication number: 20170036982Abstract: The invention is related to a process for production of acrylic acid comprising the following steps: a) preparation of a product gas mixture by a catalytic gas-phase oxidation of at least one C3 precursor compound to acrylic acid, wherein acrylic acid is formed as a main product of the catalytic gas-phase oxidation and glyoxal is formed as a by-product and the product gas mixture comprises acrylic acid and glyoxal, b) cooling of the product gas mixture, c) contacting the product gas mixture in countercourrent with an absorbent, wherein an absorbate A, comprising the absorbent and absorbed acrylic acid, is formed, d) introducing a feed stream F (2) comprising at least part of the absorbate A into a rectification column comprising a rectifying section and a stripping section, e) enriching the absorbent in the stripping section and enriching acrylic acid in the rectifying section, f) withdrawing a stream C of crude acrylic acid comprising at least 90% by weight of acrylic acid out of the rectifying section as aType: ApplicationFiled: August 3, 2016Publication date: February 9, 2017Applicant: BASF SEInventors: Tobias KORN, Till BLUM, Travis CARLINE, Christopher FUCHS, Darryl WELCH, Peter ZUROWSKI, Volker SCHLIEPHAKE, Steffen RISSEL, Thorsten FRIESE, Ulrich JAEGER, Sylke HAREMZA
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Patent number: 9212122Abstract: A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added.Type: GrantFiled: October 5, 2011Date of Patent: December 15, 2015Assignee: BASF SEInventors: Till Blum, Peter Zurowski, Tobias Johannes Korn, Sylke Haremza, Thorsten Friese, Friedrich-Georg Martin, Ulrich Jäger, Steffen Rissel, Volker Schliephake
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Patent number: 9206109Abstract: In a method of stabilizing acrylic compounds, a liquid phase containing at least one acrylic compound is mixed with at least one metal and at least one ligand. The acrylic compound can be acrylic acid, methacrylic acid, and their respective esters. The metal can be copper, manganese, and cerium. The ligand can be a quinoline compound of formula (I), an N-oxide of a compound of formula (I), 2,2?-bis(2,3-dihydro-3-oxoindolylidene), or an aliphatic y-dentate ligand with y being 2-6 and comprising at least two nitrogen atoms joined by aliphatic or aromatic C1-C4 bridges comprising y-2 further coordinating nitrogen atoms or heteroatoms: where X is OH, NH2, O—(C1-C4)-alkyl, O—C(O)—(C1-C4)-alkyl, or O—C(O)-phenyl; R1 is H, or (C1-C4)-alkyl; R2 is H, (C1-C4)-alkyl, Cl, Br, or SO3H; and R3 is H, Cl or Br.Type: GrantFiled: December 12, 2013Date of Patent: December 8, 2015Assignee: BASF SEInventors: Tobias Johannes Korn, Peter Zurowski, Thorsten Friese, Sylke Haremza, Ulrich Jaeger, Steffen Rissel, Volker Schliephake
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Patent number: 9096513Abstract: A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added.Type: GrantFiled: October 5, 2011Date of Patent: August 4, 2015Assignee: BASF SEInventors: Till Blum, Peter Zurowski, Tobias Johannes Korn, Sylke Haremza, Thorsten Friese, Friedrich-Georg Martin, Ulrich Jäger, Steffen Rissel, Volker Schliephake
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Publication number: 20140228571Abstract: In a method of stabilizing acrylic compounds, a liquid phase containing at least one acrylic compound is mixed with at least one metal and at least one ligand. The acrylic compound can be acrylic acid, methacrylic acid, and their respective esters. The metal can be copper, manganese, and cerium. The ligand can be a quinoline compound of formula (I), an N-oxide of a compound of formula (I), 2,2?-bis(2,3-dihydro-3-oxoindolylidene), or an aliphatic y-dentate ligand with y being 2-6 and comprising at least two nitrogen atoms joined by aliphatic or aromatic C1-C4 bridges comprising y-2 further coordinating nitrogen atoms or heteroatoms: where X is OH, NH2, O—(C1-C4)-alkyl, O—C(O)—(C1-C4)-alkyl, or O—C(O)-phenyl; R1 is H, or (C1-C4)-alkyl; R2 is H, (C1-C4)-alkyl, Cl, Br, or SO3H; and R3 is H, Cl or Br.Type: ApplicationFiled: December 12, 2013Publication date: August 14, 2014Applicant: BASF SEInventors: Tobias Johannes KORN, Peter Zurowski, Thorsten Friese, Sylke Haremza, Ulrich Jäger, Steffen Rissel, Volker Schliephake
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Patent number: 8530678Abstract: Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.Type: GrantFiled: October 20, 2005Date of Patent: September 10, 2013Assignee: BASF AktiengesellschaftInventors: Markus Siegert, Neven Lang, Eckhard Stroefer, Achim Stammer, Thorsten Friese
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Patent number: 8299299Abstract: A process for separating acrylic acid present as a main product and glyoxal present as a by-product in a product gas mixture of a partial gas phase oxidation of a C3 precursor compound, in which a liquid phase P is obtained, which consists of acrylic acid to an extent of at least 70% of its weight and, based on the molar amount of acrylic acid present therein, comprises at least 200 molar ppm of glyoxal, in which the glyoxal is separated from the acrylic acid in the liquid phase P by crystallization.Type: GrantFiled: July 24, 2009Date of Patent: October 30, 2012Assignee: BASF SEInventors: Till Blum, Peter Zurowski, Steffen Rissel, Sylke Haremza, Thorsten Friese, Ulrich Jaeger, Volker Schliephake, Klaus Joachim Mueller-Engel, Ulrich Hammon, Joerg Heilek, Imke Britta Mueller
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Publication number: 20120258019Abstract: A redissociating apparatus to carry out a process for redissociating Michael adducts which are present in a liquid F with a proportion by weight of ?10% by weight and have been formed in the preparation of acrylic acid or esters thereof is provided. The apparatus comprises a pump P, a separating column K with separating internals and a circulation heat exchanger UW, wherein, for the purpose of supplying the cleavage energy, the pump P sucks in bottoms liquid from the bottom space of the separating column K and, via the circulation heat exchanger UW, continually recycles it into the bottom space above the level of the bottoms liquid, and wherein the pump P is a radial circulation pump with an open impeller.Type: ApplicationFiled: June 21, 2012Publication date: October 11, 2012Applicant: BASF SEInventors: Volker SCHLIEPHAKE, Thorsten FRIESE, Klaus BOTT, Michael BLECHSCHMITT, Till BLUM, Klaus Joachim MÜLLER-ENGEL
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Patent number: 8263802Abstract: A process for redissociating Michael adducts which are present in a liquid F with a proportion by weight of ?10% by weight and have been formed in the preparation of acrylic acid or esters thereof in a redissociating apparatus which comprises a pump P, a separating column K with separating internals and a circulation heat exchanger UW, wherein, for the purpose of supplying the cleavage energy, the pump P sucks in bottoms liquid from the bottom space of the separating column K and, via the circulation heat exchanger UW, continually recycles it into the bottom space above the level of the bottoms liquid, and wherein the pump P is a radial circulation pump with an open impeller.Type: GrantFiled: December 9, 2009Date of Patent: September 11, 2012Assignee: BASF SEInventors: Volker Schliephake, Thorsten Friese, Klaus Bott, Michael Blechschmitt, Till Blum, Klaus Joachim Mueller-Engel
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Publication number: 20120130134Abstract: A process for the preparation of polyetherols, comprising the following steps: a) reaction of at least one starter compound with at least one alkylene oxide and a catalyst to give a crude polyetherol and b) removal of low molecular weight byproducts from the crude polyetherol from step a), wherein the crude polyetherol is treated with a stripping gas in a column having internals.Type: ApplicationFiled: July 27, 2010Publication date: May 24, 2012Applicant: BASF SEInventors: Matthias Schopohl, Thomas Ostrowski, Dirk Meckelnburg, Renata Jovanovic, Achim Loeffler, Hans-Juergen Pallasch, Thorsten Friese, Eckard Schauss, Susanne Szeschkus, Vinit Chilekar, Hans Volkmar Schwarz
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Publication number: 20120085969Abstract: A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added.Type: ApplicationFiled: October 5, 2011Publication date: April 12, 2012Applicant: BASF SEInventors: Till Blum, Peter Zurowski, Tobias Johannes Korn, Sylke Haremza, Thorsten Friese, Friedrich-Georg Martin, Ulrich Jäger, Steffen Rissel, Volker Schliephake
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Patent number: 8076510Abstract: A process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid over a fixed catalyst bed disposed in a tube bundle reactor cooled by a heat exchange medium, wherein the temperature of the heat exchange medium is ?290° C. and the temperature of that reactor plate surface which faces the reaction gas entry mixture and the temperature of the reaction gas entry mixture itself are ?285° C.Type: GrantFiled: April 22, 2008Date of Patent: December 13, 2011Assignee: BASF SEInventors: Ulrich Hammon, Thorsten Friese, Jochen Petzoldt, Klaus Joachim Mueller-Engel, Ulrich Cremer, Andreas Raichle
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Patent number: 7931255Abstract: A fabric packing has a plurality of layers made of a filament of metal or plastic and includes bulges for maintaining the fabric layers at a distance. The bulges have first protuberances of generally trough-shaped configuration and second protuberances formed on the first protuberances, thereby defining respective apexes. The second protuberances are sized smaller than the first protuberances, wherein neighboring fabric layers are supported on one another via the second protuberances.Type: GrantFiled: March 13, 2007Date of Patent: April 26, 2011Assignees: T & R Engineering GmbH, BASF AktiengesellschaftInventors: Rüdiger Tüshaus, Peter Rössler, Michael Jödecke, Thorsten Friese
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Publication number: 20110036704Abstract: A process for removal of a crude acrylic acid from a product gas mixture which comprises glyoxal as a by-product from a heterogeneously catalyzed partial gas phase oxidation of at least one C3 precursor compound, which comprises the absorption of the acrylic acid in a high-boiling absorbent and the rectificative workup of the resulting adsorbate, and in which absorbent present in the bottoms liquid withdrawn from the bottom space of the absorption column is distilled off in a distillation unit and recycled into the absorption, before high boilers which remain are discharged, and in which the glyoxal content of the crude acrylic acid is reduced by restricting the high boiler residence time in the distillation unit.Type: ApplicationFiled: June 30, 2010Publication date: February 17, 2011Applicant: BASF SEInventors: Till BLUM, Peter Zurowski, Steffen Rissel, Sylke Haremza, Thorsten Friese, Ulrich Jäger, Volker Schliephake, Klaus Joachim Müller-Engel, Ulrich Hammon, Frank Höfer
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Publication number: 20100152466Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.Type: ApplicationFiled: August 4, 2006Publication date: June 17, 2010Inventors: Neven Lang, Eckhard Stroefer, Achim Stammer, Thorsten Friese, Markus Siegert, Hans Hasse, Thomas Gruetzner, Sergej Blagov
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Publication number: 20100152482Abstract: A process for redissociating Michael adducts which are present in a liquid F with a proportion by weight of ?10% by weight and have been formed in the preparation of acrylic acid or esters thereof in a redissociating apparatus which comprises a pump P, a separating column K with separating internals and a circulation heat exchanger UW, wherein, for the purpose of supplying the cleavage energy, the pump P sucks in bottoms liquid from the bottom space of the separating column K and, via the circulation heat exchanger UW, continually recycles it into the bottom space above the level of the bottoms liquid, and wherein the pump P is a radial circulation pump with an open impeller.Type: ApplicationFiled: December 9, 2009Publication date: June 17, 2010Applicant: BASF SEInventors: Volker Schliephake, Thorsten Friese, Klaus Bott, Michael Blechschmitt, Till Blum, Klaus Joachim Müller-Engel
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Patent number: 7713387Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary componentsType: GrantFiled: December 21, 2004Date of Patent: May 11, 2010Assignee: BASF AktiengesellschaftInventors: Markus Siegert, Neven Lang, Eckhard Ströfer, Achim Stammer, Thorsten Friese, Hans Hasse
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Publication number: 20100022734Abstract: A process for separating acrylic acid present as a main product and glyoxal present as a by-product in a product gas mixture of a partial gas phase oxidation of a C3 precursor compound, in which a liquid phase P is obtained, which consists of acrylic acid to an extent of at least 70% of its weight and, based on the molar amount of acrylic acid present therein, comprises at least 200 molar ppm of glyoxal, in which the glyoxal is separated from the acrylic acid in the liquid phase P by crystallization.Type: ApplicationFiled: July 24, 2009Publication date: January 28, 2010Applicant: BASF SEInventors: Till Blum, Peter Zurowski, Steffen Rissel, Sylke Haremza, Thorsten Friese, Ulrich Jäger, Volker Schliephake, Klaus Joachim Müller-Engel, Ulrich Hammon, Jörg Heilek, Imke Britta Müller
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Publication number: 20090270652Abstract: A process for transferring heat to a liquid F comprising dissolved monomeric acrylic acid, Michael acrylic acid oligomers, and acrylic acid polymer with the aid of an indirect heat exchanger to which are supplied the liquid F with a temperature TF of ?150° C. and a fluid heat carrier W with a temperature of TW>TF, wherein the formation of gas bubbles and/or of thin layers of liquid F adjoining a gas phase is brought about in the liquid F during the flow through the heat exchanger.Type: ApplicationFiled: April 24, 2009Publication date: October 29, 2009Applicant: BASF SEInventors: Till BLUM, Peter ZUROWSKI, Steffen RISSEL, Sylke HAREMZA, Thorsten FRIESE, Ulrich JAGER, Volker SCHLIEPHAKE, Klaus Joachim MUELLER-ENGEL, Bernd RUMPF