Patents by Inventor Ralf-Thomas Rahn
Ralf-Thomas Rahn 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: 20190084898Abstract: An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I) R1R2N—P(X)(NH2)2, wherein X is oxygen or sulfur; R1 is a C1 to C20 alkyl, C3 to C20 cycloalkyl, C6 to C20 aryl, or dialkylaminocarbonyl group; R2 is H, or R1 and R2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C2 to C12 alkyl groups R21, wherein at least one of the groups R21 is different to the other groups R21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C2 to C12 alkyl groups R22, wherein at least one of the grouType: ApplicationFiled: November 21, 2018Publication date: March 21, 2019Inventors: Karl-Heinrich SCHNEIDER, Claudia KLODWIG, Gregor PASDA, Alexander WISSEMEIER, Daniella LOHE, Achim REDDIG, Christian Carlos MIYAGAWA, Wolfram ZERULLA, Steffen TSCHIRSCHWITZ, Ralf-Thomas RAHN, Ansgar Gereon ALTENHOFF, Stephan HÜFFER
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Patent number: 10150712Abstract: An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I) R1R2N—P(X)(NH2)2, wherein X is oxygen or sulfur; R1 is a C1 to C20 alkyl, C3 to C20 cycloalkyl, C6 to C20 aryl, or dialkylaminocarbonyl group; R2 is H, or R1 and R2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C2 to C12 alkyl groups R21, wherein at least one of the groups R21 is different to the other groups R21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C2 to C12 alkyl groups R22, wherein at least one of the groups RType: GrantFiled: June 27, 2014Date of Patent: December 11, 2018Assignee: BASF SEInventors: Karl-Heinrich Schneider, Claudia Klodwig, Gregor Pasda, Alexander Wissemeier, Daniella Lohe, Achim Reddig, Christian Carlos Miyagawa, Wolfram Zerulla, Steffen Tschirschwitz, Ralf-Thomas Rahn, Ansgar Gereon Altenhoff, Stephan Hüffer
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Publication number: 20170158575Abstract: An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I) R1R2N—P(X)(NH2)2, wherein X is oxygen or sulfur; R1 is a C1 to C20 alkyl, C3 to C20 cycloalkyl, C6 to C20 aryl, or dialkylaminocarbonyl group; R2 is H, or R1 and R2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C2 to C12 alkyl groups R21, wherein at least one of the groups R21 is different to the other groups R21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C2 to C12 alkyl groups R22, wherein at least one of theType: ApplicationFiled: June 27, 2014Publication date: June 8, 2017Applicant: BASF SEInventors: Karl-Heinrich Schneider, Claudia Klodwig, Gregor Pasda, Alexander Wissemeier, Daniella Lohe, Achim Reddig, Christian Miyagawa, Wolfram Zerulla, Steffen Tschirschwitz, Ralf-Thomas Rahn, Ansgar Gereon Altenhoff, Stephan Hüffer
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Patent number: 8603211Abstract: A mixture for the treatment of urea-containing fertilizers comprises a) at least one (thio)phosphoric acid triamide of the general formula (I) R1R2N—P(X)(NH2)2 and/or (thio)phosphoric acid diamide of the general formula (II) R1O—P(X)(NH2)2, X denoting oxygen or sulfur, R1 and R2 independently from each other being hydrogen, substituted or unsubstituted 2-nitrophenyl, C1-10-alkyl, C3-10-cycloalkyl, C3-10-heterocycloalkyl, C6-10-aryl, C6-10-heteroaryl or diaminocarbonyl, where R1 and R2 together with the nitrogen atom connecting them can also form a 5 or 6-membered saturated or unsaturated heterocyclic group, which optionally may also comprise one or two additional heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, as component A, and b) at least one compound comprising an amino group having a boiling point of more than 100° C. as component B.Type: GrantFiled: December 18, 2008Date of Patent: December 10, 2013Assignee: FERTIVA GmbHInventors: Ralf-Thomas Rahn, Gerd Buehler, Alexander Wissemeier, Wolfgang Weigelt
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Patent number: 8110536Abstract: The invention relates to a bleach system comprising at least one component selected from bleach, bleach activator or bleach catalyst, wherein the bleach system is enveloped with at least one polymer layer and the polymer has urethane and urea groups. The inventive bleach system and detergent formulations comprising this bleach system are suitable for washing or cleaning textiles or dishware.Type: GrantFiled: April 3, 2007Date of Patent: February 7, 2012Assignee: BASF SEInventors: Frank Dietsche, Karl Haeberle, Ralf-Thomas Rahn, Dietmar Haering
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Patent number: 8075659Abstract: The invention relates to preparations with improved urease-inhibitory effect which comprise at least two different (thio)phosphoric triamides and to urea-comprising fertilizers which comprise these preparations. The invention furthermore relates to a method of preparing these preparations, to the use of these preparations in the fertilization with urea-comprising fertilizers, and to the use of urea-comprising fertilizers which comprise these preparations in agriculture or in horticulture.Type: GrantFiled: February 7, 2007Date of Patent: December 13, 2011Assignee: BASF SEInventors: Alexander Wissemeier, Patrick Deck, Oliver Huttenloch, Michael Mauβ, Gregor Pasda, Ralf-Thomas Rahn, Wolfgang Weigelt, Wolfram Zerulla
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Publication number: 20110154874Abstract: A mixture for the treatment of urea-containing fertilizers comprises a) at least one (thio)phosphoric acid triamide of the general formula (I) R1R2N—P(X)(NH2)2 and/or (thio)phosphoric acid diamide of the general formula (II) R1O—P(X)(NH2)2, X denoting oxygen or sulfur, R1 and R2 independently from each other being hydrogen, substituted or unsubstituted 2-nitrophenyl, C1-10-alkyl, C3-10-cycloalkyl, C3-10-heterocycloalkyl, C6-10-aryl, C6-10-heteroaryl or diaminocarbonyl, where R1 and R2 together with the nitrogen atom connecting them can also form a 5 or 6-membered saturated or unsaturated heterocyclic group, which optionally may also comprise one or two additional heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, as component A, and b) at least one compound comprising an amino group having a boiling point of more than 100° C. as component B.Type: ApplicationFiled: December 18, 2008Publication date: June 30, 2011Applicant: FERTIVA GmbHInventors: Ralf-Thomas Rahn, Gerd Buehler, Alexander Wissemeier, Wolfgang Weigelt
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Publication number: 20100218575Abstract: The invention relates to preparations with improved urease-inhibitory effect which comprise at least two different (thio)phosphoric triamides and to urea-comprising fertilizers which comprise these preparations. The invention furthermore relates to a method of preparing these preparations, to the use of these preparations in the fertilization with urea-comprising fertilizers, and to the use of urea-comprising fertilizers which comprise these preparations in agriculture or in horticulture.Type: ApplicationFiled: February 7, 2007Publication date: September 2, 2010Applicant: BASF SEInventors: Alexander Wissemeier, Patrick Deck, Oliver Huttenloch, Michael Mauss, Gregor Pasda, Ralf-Thomas Rahn, Wolfgang Weigelt, Wolfram Zerulla
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Publication number: 20090054289Abstract: The invention relates to a bleach system comprising at least one component selected from bleach, bleach activator or bleach catalyst, wherein the bleach system is enveloped with at least one polymer layer and the polymer has urethane and urea groups. The inventive bleach system and detergent formulations comprising this bleach system are suitable for washing or cleaning textiles or dishware.Type: ApplicationFiled: April 3, 2007Publication date: February 26, 2009Applicant: BASF SEInventors: Frank Dietsche, Karl Haberle, Ralf-Thomas Rahn, Dietmar Haring
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Patent number: 7253280Abstract: The present invention relates to a process for the catalytic preparation of melamine by decomposition of urea over particular solid catalysts using a main reactor and an after-reactor. A catalyst having a low Lewis acidity is used in the main reactor and a catalyst having an equal or preferably higher Lewis acidity is used in the after-reactor.Type: GrantFiled: January 16, 2004Date of Patent: August 7, 2007Assignee: BASF AktiengesellschaftInventors: Christian Kuhrs, Eckehard Danz, Wolfgang Steiner, Ralf-Thomas Rahn, Thomas Grassler, Reiner Geier, Klaus Harth, Markus Hölzle
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Patent number: 7217679Abstract: A catalyst for the hydrogenation of C4-dicarboxylic acids and/or their derivatives, preferably maleic anhydride, in the gas phase comprises from 5 to 100% by weight, preferably from 40 to 90% by weight, of copper oxide and from 0 to 95% by weight, preferably from 10 to 60% by weight, of one or more metals or compounds thereof selected from the group consisting of Al, Si, Zn, Pd, La, Ce, the elements of groups III A to VIII A and groups I A and II A as active composition applied in the form of a thin layer to an inert support material.Type: GrantFiled: December 7, 2001Date of Patent: May 15, 2007Assignee: BASF AktiengesellschaftInventors: Holger Borchert, Stephan Schlitter, Rolf-Hartmuth Fischer, Markus Rösch, Frank Stein, Ralf-Thomas Rahn, Alexander Weck
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Publication number: 20060167250Abstract: The present invention relates to a process for the catalytic preparation of melamine by decomposition of urea over particular solid catalysts using a main reactor and an after-reactor. A catalyst having a low Lewis acidity is used in the main reactor and a catalyst having an equal or preferably higher Lewis acidity is used in the after-reactor.Type: ApplicationFiled: January 16, 2004Publication date: July 27, 2006Applicant: BASF AKTIENGESELLSCHAFTInventors: Christian Kuhrs, Eckehard Danz, Wolfgang Steiner, Ralf-Thomas Rahn, Thomas Grabler, Reiner Geter, Klaus Harth, Markus Holzle
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Patent number: 6958404Abstract: C4-dicarboxylic acids or derivatives thereof are hydrogenated in the gas phase in a fluidized-bed reactor. It is possible to use catalyst compositions known per se.Type: GrantFiled: December 7, 2001Date of Patent: October 25, 2005Assignee: BASF AktiengesellschaftInventors: Holger Borchert, Stephan Schlitter, Michael Hesse, Frank Stein, Rolf-Hartmuth Fischer, Ralf-Thomas Rahn, Alexander Weck, Markus Rösch
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Patent number: 6921830Abstract: In a process for purifying an organic solvent for the absorption of maleic anhydride from a gaseous mixture, in which the maleic anhydride is separated off from the solvent, a substream is taken from the solvent stream, this substream is distilled and returned to the solvent circuit, the proposed improvement comprises separating off a low-boiling fraction and a high-boiling fraction from the fraction consisting essentially of purified solvent and feeding the fraction consisting essentially of purified solvent back into the solvent stream.Type: GrantFiled: April 22, 2002Date of Patent: July 26, 2005Inventors: Ralf-Thomas Rahn, Alexander Weck, Gerd Kaibel
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Patent number: 6888011Abstract: A hydrogenation catalyst which is suitable, in particular, for the hydrogenation of maleic anhydride and its derivatives to THF or its derivatives comprises copper oxide and at least one further metal or compound thereof, preferably an oxide, selected from the group consisting of Al, Si, Zn, La, Ce, the elements of groups IIIA to VIIIA and the elements of groups IA and IIA and having a pore volume of ?0.01 ml/g for pore diameters of >50 nm and a ratio of the pore volume of macropores having a diameter of >50 nm to the total pore volume for pores having a diameter of >4 nm of >10%.Type: GrantFiled: December 7, 2001Date of Patent: May 3, 2005Assignee: BASF AktiengesellschaftInventors: Holger Borchert, Stephan Schlitter, Markus Rösch, Rolf-Hartmuth Fischer, Ralf-Thomas Rahn, Alexander Weck
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Patent number: 6846389Abstract: In a process for the continuous fractional distillation of mixtures comprising tetrahydrofuran, ?-butyrolactone and/or 1,4-butanediol to give at least three fractions, the fractionation is carried out in an assembly of distillation columns comprising at least one dividing wall column or at least one assembly of thermally coupled conventional distillation columns.Type: GrantFiled: May 3, 2001Date of Patent: January 25, 2005Assignee: BASF AktiengesellschaftInventors: Gerd Kaibel, Alexander Weck, Ralf-Thomas Rahn
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Patent number: 6831182Abstract: The present invention relates to a process for the gas-phase hydrogenation of C4-dicarboxylic acids and/or their derivatives over a catalyst based on copper oxide to give substituted or unsubstituted &ggr;-butyrolactone and/or tetrahydrofuran, which comprises, which a first reaction zone in which the C4-dicarboxylic acid and/or its derivatives is/are reacted to give a mixture comprising a substituted or unsubstituted &ggr;-butyrolactone as main product and a subsequent second reaction zone in which the substituted or unsubstituted &ggr;-butyrolactone present in the mixture from the first hydrogenation step is reacted at a temperature lower than the temperature in the first hydrogenation step to give substituted or unsubstituted tetrahydrofuran.Type: GrantFiled: June 4, 2003Date of Patent: December 14, 2004Assignee: BASF AktiengesellschaftInventors: Holger Borchert, Stephan Schlitter, Rolf-Hartmuth Fischer, Markus Rösch, Frank Stein, Ralf-Thomas Rahn, Alexander Weck, Gerd Kaibel
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Patent number: 6730800Abstract: Unsubstituted or alkyl-substituted THF is obtained by catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or their derivatives using a catalyst comprising <80% by weight, preferably <70% by weight, in particular from 10 to 65% by weight, of CuO and >20% by weight, preferably >30% by weight, in particular from 35 to 90% by weight, of an oxidic support having acid centers, at a hot spot temperature of from 240 to 310° C., preferably from 240 to 280° C., and a WHSV over the catalyst of from 0.01 to 1.0, preferably from 0.02 to 1, in particular from 0.05 to 0.5, kg of starting material/l of catalyst x hour.Type: GrantFiled: June 4, 2003Date of Patent: May 4, 2004Assignee: BASF AktiengesellschaftInventors: Rolf-Hartmuth Fischer, Frank Stein, Rolf Pinkos, Michael Hesse, Michael Jolyon Sprague, Markus Rösch, Holger Borchert, Stephan Schlitter, Ralf-Thomas Rahn, Alexander Weck
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Publication number: 20040044230Abstract: C4-dicarboxylic acids or derivatives thereof are hydrogenated in the gas phase in a fluidized-bed reactor. It is possible to use catalyst compositions known per se.Type: ApplicationFiled: June 11, 2003Publication date: March 4, 2004Inventors: Holger Borchert, Stephan Schlitter, Michael Hesse, Frank Stein, Rolf-Hartmuth Fischer, Ralf-Thomas Rahn, Alexander Weck, Markus Rosch
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Publication number: 20040039214Abstract: Unsubstituted or alkyl-substituted THF is obtained by catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or their derivatives using a catalyst comprising <80% by weight, preferably <70% by weight, in particular from 10 to 65% by weight, of CuO and >20% by weight, preferably >30% by weight, in particular from 35 to 90% by weight, of an oxidic support having acid centers, at a hot spot temperature of from 240 to 310° C., preferably from 240 to 280° C., and a WHSV over the catalyst of from 0.01 to 1.0, preferably from 0.02 to 1, in particular from 0.05 to 0.5, kg of starting material/l of catalyst×hour.Type: ApplicationFiled: June 4, 2003Publication date: February 26, 2004Inventors: Rolf-Hartmuth Fischer, Frank Stein, Rolf Pinkos, Michael Hesse, Michael Jolyon Sprague, Markus Rosch, Holger Borchert, Stephan Schlitter, Ralf-Thomas Rahn, Alexander Weck