Patents by Inventor Martin Merger

Martin Merger 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).

  • Patent number: 7696360
    Abstract: The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: April 13, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerd Kaibel, Martin Merger, Thomas Domschke, Petra Deckert, Friedrich Sauer
  • Publication number: 20070123717
    Abstract: A method for the production of C1-C10-alkyl 2-keto-L-gulonates by esterification of 2-keto-L-gulonic acid anhydrate with an anhydrous C1-C10-alkyl alcohol in the presence of an acidic homogeneous catalyst in a reactor cascade comprising at least two reactors, one of these reactors being a tubular reactor, without the water forming in the esterification being removed from the reaction space.
    Type: Application
    Filed: December 10, 2004
    Publication date: May 31, 2007
    Applicant: Basf Aktiengesellschaft
    Inventors: Thomas Domschke, Martin Merger, Frank Haese, Peter Resch, Tillmann Faust
  • Patent number: 7091153
    Abstract: A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises (a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group consisting of aluminum, silicon, zirconium, titanium and vanadium, (c) from 0 to 0.3% by weight based on (a) of a compound based on an alkali and/or alkaline earth metal, and also (d) from 0.001 to 1% by weight based on (a) of manganese.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: August 15, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken, Martin Merger, Frank Ohlbach, Alwin Rehfinger
  • Patent number: 7091375
    Abstract: The invention relates to a method for producing 2-keto-L-gulonic acid-C4–C10 alkyl ester by esterifying 2-keto-L-gulonic acid (KGS) with an unsaturated, branched or unbranched C4–C10 alcohol. The inventive method is characterized by the fact that an aqueous KGS solution is reacted with a C4–C10 alcohol up to an esterification degree of 20 to 70 percent in a pre-esterification process carried out under acidic catalysis conditions; and the obtained product is dehydrogenated with an unsaturated, branched or unbranched C4–C10 alcohol in a continuous rectification device, whereby the esterification reaction continues, n-butanol preferably being used as the alkyl alcohol. In a preferred embodiment, the aqueous KGS solution is concentrated up to or beyond the limit of solubility prior to the esterification process, preferably by catalyzing a homogeneous or heterogeneous catalyst, especially sulfonic acid, at temperatures of 50 to 120° C.
    Type: Grant
    Filed: November 7, 2003
    Date of Patent: August 15, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Domschke, Martin Merger, Georg Grossmann, Tillmann Faust
  • Publication number: 20060149084
    Abstract: The present invention relates to a process for extracting 2-keto-L-gulonic acid (KGA) from a polar, preferably aqueous, solvent, preferably from a solvent which comprises a mixture of ascorbic acid and 2-keto-L-gulonic acid, by means of liquid/liquid extraction using an extractant which comprises a tertiary amine and a polar organic diluent. The process of the invention preferably also comprises steps for back-extraction of the KGA and recycling of the extractant. The present invention likewise relates to a process for preparing ascorbic acid from KGA and isolating the prepared ascorbic acid.
    Type: Application
    Filed: December 13, 2003
    Publication date: July 6, 2006
    Inventors: Thomas Domschke, Martin Merger, Petra Deckert, Friedrich Sauer
  • Publication number: 20060058550
    Abstract: The invention relates to a method for producing 2-keto-L-gulonic acid-C4-C10 alkyl ester by esterifying 2-keto-L-gulonic acid (KGS) with an unsaturated, branched or unbranched C4-C10 alcohol. The inventive method is characterized by the fact that an aqueous KGS solution is reacted with a C4-C10 alcohol up to an esterification degree of 20 to 70 percent in a pre-esterification process carried out under acidic catalysis conditions; and the obtained product is dehydrogenated with an unsaturated, branched or unbranched C4-C10 alcohol in a continuous rectification device, whereby the esterification reaction continues, n-butanol preferably being used as the alkyl alcohol. In a preferred embodiment, the aqueous KGS solution is concentrated up to or beyond the limit of solubility prior to the esterification process, preferably by catalyzing a homogeneous or heterogeneous catalyst, especially sulfonic acid, at temperatures of 50 to 120 ° C.
    Type: Application
    Filed: November 7, 2003
    Publication date: March 16, 2006
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Thomas Domschke, Martin Merger, Georg Grobmann, Tillmann Faust
  • Publication number: 20050197504
    Abstract: The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.
    Type: Application
    Filed: July 7, 2003
    Publication date: September 8, 2005
    Inventors: Gerd Kaibel, Martin Merger, Thomas Domschke, Petra Deckert, Friedrich Sauer
  • Patent number: 6852669
    Abstract: A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises (a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group consisting of aluminum, silicon, zirconium, titanium and vanadium, (c) from 0 to 0.3% by weight based on (a) of a compound based on an alkali and/or alkaline earth metal, and also (d) from 0.001 to 1% by weight based on (a) of manganese.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: February 8, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Guido Voit, Rolf Fischer, Peter Bassler, Andreas Ansmann, Hermann Luyken, Martin Merger, Frank Ohlbach, Alwin Rehfinger
  • Publication number: 20040262161
    Abstract: A process for the isolation of salts of organic acids from an aqeuous solution, in particular from a fermentation discharge, by partial evaporative crystallization and subsequent or simultaneous displacement precipitation of its salts, and for the liberation of the organic acid from the crystals, preferably by means of an electromembrane process, is described.
    Type: Application
    Filed: April 9, 2004
    Publication date: December 30, 2004
    Inventors: Matthias Rauls, Hartwig Vob, Tillmann Faust, Thomas Domschke, Martin Merger
  • Patent number: 6815388
    Abstract: Passivated iron useful as catalytically active component after activation is activated by hydrogen at elevated temperature and elevated pressure in the presence of a nitrile.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: November 9, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank Ohlbach, Rolf Fischer, Hermann Luyken, Johann-Peter Melder, Martin Merger, Andreas Ansmann, Peter Bassler
  • Publication number: 20040181095
    Abstract: A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises
    Type: Application
    Filed: February 12, 2004
    Publication date: September 16, 2004
    Inventors: Guido Voit, Rolf Fischer, Peter Babetaler, Andreas Ansmann, Hermann Luyken, Martin Merger, Frank Ohlbach, Alwin Rehfinger
  • Patent number: 6677486
    Abstract: Nitriles are hydrogenated to primary amines over an activated, alpha-Al2O3-containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, which is obtainable by a process comprising the steps in the order (a)-(f): (a) preparing a kneadable composition comprising the alloy, a shaping aid, water and a pore former; (b) shaping the kneadable composition to form a shaped body; (c) calcining the shaped body; (d) activating the calcined shaped body by treatment with aqueous alkali metal hydroxide solution; (e) rinsing the shaped catalyst body with aqueous alkali metal hydroxide solution; (f) rinsing the shaped catalyst body with water.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: January 13, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Ansmann, Christoph Benisch, Frank Funke, Frank Ohlbach, Martin Merger
  • Patent number: 6469211
    Abstract: In a process for the continuous hydrogenation of nitrites to primary amines in the liquid phase over a suspended, activated Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, the hydrogenation is carried out in the absence of ammonia and basic alkali metal compounds or alkaline earth metal compounds.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: October 22, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Ansmann, Christoph Benisch, Frank Funke, Frank Ohlbach, Martin Merger
  • Patent number: 6462220
    Abstract: A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile by a) hydrogenating adiponitrile in the presence of a catalyst comprising an element of the eighth transition group as catalytically active component, to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, b) distillatively removing hexamethylenediamine from the mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, and either cl) distillatively removing 6-aminocapronitrile, and then d1) distillatively removing adiponitrile, or c2) simultaneously distillatively removing 6-aminocapronitrile and adiponitrile into separate fractions is characterized by base of column temperatures below 185° C. in steps d1) or c2).
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: October 8, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Hermann Luyken, Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Johann-Peter Melder, Martin Merger, Alwin Rehfinger, Guido Voit, Günther Achhammer
  • Publication number: 20020058841
    Abstract: Nitriles are hydrogenated to primary amines over an activated, alpha-Al2O3-containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, which is obtainable by a process comprising the steps in the order (a)-(f):
    Type: Application
    Filed: November 7, 2001
    Publication date: May 16, 2002
    Inventors: Andreas Ansmann, Christoph Benisch, Frank Funke, Frank Ohlbach, Martin Merger
  • Publication number: 20020058842
    Abstract: In a process for the continuous hydrogenation of nitrites to primary amines in the liquid phase over a suspended, activated Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, the hydrogenation is carried out in the absence of ammonia and basic alkali metal compounds or alkaline earth metal compounds.
    Type: Application
    Filed: November 14, 2001
    Publication date: May 16, 2002
    Inventors: Andreas Ansmann, Christoph Benisch, Frank Funke, Frank Ohlbach, Martin Merger
  • Patent number: 6362332
    Abstract: A cyclic lactam and a cyclic amine are coproduced by reacting an aliphatic alpha, omega-diamine with water in the gas phase in the presence of a heterogeneous catalyst.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: March 26, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Merger, Rolf Fischer, Andreas Ansmann
  • Patent number: 6362333
    Abstract: A cyclic lactam and a cyclic amine are coproduced by coreacting an aliphatic alpha, omega-diamine and an aliphatic alpha, omega-aminonitrile with water in the gas phase in the presence of a heterogeneous catalyst.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: March 26, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Merger, Rolf Fischer, Andreas Ansmann
  • Patent number: 6359178
    Abstract: A process for catalytic hydrogenation of adiponitrile to hexamethylenediamine at elevated temperature and elevated pressure in the presence of catalysts based on elemental iron as catalytically active component and ammonia as solvent comprises a) hydrogenating adiponitrile at from 70 to 220° C.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: March 19, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fischer, Peter Bassler, Hermann Luyken, Frank Ohlbach, Johann-Peter Melder, Martin Merger, Andreas Ansmann, Alwin Rehfinger, Guido Voit
  • Patent number: 6346641
    Abstract: A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile by a) hydrogenating adiponitrile in the presence of a catalyst comprising an element of the eighth transition group as catalytically active component, to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, b) distillatively removing hexamethylenediamine from the mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, and either c1) distillatively removing 6-aminocapronitrile, and then d1) distillatively removing adiponitrile, or c2) simultaneously distillatively removing 6-aminocapronitrile and adiponitrile into separate fractions is characterized by base of column temperatures below 185° C. in steps d1) or c2).
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: February 12, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Hermann Luyken, Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Johann-Peter Melder, Martin Merger, Alwin Rehfinger, Guido Voit, Günther Achhammer