Patents by Inventor Martin Koerfer

Martin Koerfer 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).

  • Publication number: 20230391720
    Abstract: D,L-methionine may include, based on the total weight of the D,L-methionine, from 15 to less than 50 wt.-% of the D,L-methionine with a particle size from more than 0 to less 150 micrometers, from 50 to less than 90 wt.-% of the D,L-methionine with a particle size from more than 0 to less 300 micrometers, and from 30 to less than 80 wt.-% of the D,L-methionine with a particle size in the range between 63 and 300 micrometers. The D,L-methionine may have a bulk density of at least 710 kg/m3.
    Type: Application
    Filed: October 11, 2021
    Publication date: December 7, 2023
    Applicant: Evonik Operations GmbH
    Inventors: Martin KOERFER (Deceased), Hans-Joachim HASSELBACH, Stefan REICHERT, Mauricio ANTEZANA, Antje HANSMEIER
  • Publication number: 20230270137
    Abstract: A coated composition for feeding a ruminant may include: (A) a core of a biologically active ingredient selected from (A-i) amino acids, N-acylamino acids, N-guanylamino acids, and/or salts thereof and/or 2-hydroxy-4-(methyl)butyric acid calcium salt; (A-ii) proteins; (A-iii) peptides; (A-iv) carbohydrates; (A-v) vitamins, vitamin A (acetate or palmitate), B, D2, D3, E, thiamine (HCl), riboflavin, nicotinic acid (amide), calcium pantothenate, choline pantothenate, pyridoxine hydrochloride, choline chloride, cyano-cobalamin, biotin, folic acid, and p-aminobenzoic acid; (A-vi) probiotic microorganisms; (A-vii) prebiotic foods; (A-viii) choline and salts thereof; (A-ix) polyunsaturated fatty acids, and salts thereof; and x) any combination of (A-i) to (A-ix); and (B) a coating, encapsulating the core, constituting 1 to 15% of total coated composition weight and including 85 to 95% wt./wt. of a film-forming agent, which is triethyl citrate, and 5 to 15% wt./wt.
    Type: Application
    Filed: November 3, 2021
    Publication date: August 31, 2023
    Applicant: Evonik Operations GmbH
    Inventors: Georg BORCHERS, Thomas GOTTSTEIN, Winfried HEIMBECK, Martin KOERFER (Deceased), Barry JACKSON, Claudia PARYS, Christian RABE
  • Patent number: 11180426
    Abstract: The present invention relates to a process for producing a particulate composition containing methionine, methionylmethionine, potassium in the form of potassium salt and ammonium sulphate, and use thereof.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: November 23, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Martin Koerfer, Hans Joachim Hasselbach, Gerit Niggemann, Antje Hansmeier, Hans Christian Alt, Dominik Egly, Peter Schulte
  • Patent number: 11014878
    Abstract: The present invention relates to a method for preparing 3-methylthiopropionaldehyde by reacting methyl mercaptan with acrolein, in which deviations in the stoichiometry of methyl mercaptan to acrolein in the reaction to give 3-methylthiopropionaldehyde are compensated for by supplying or by forming 1,3-bis(methylthio)-1-propanol, and also to the use of 1,3-bis(methylthio)-1-propanol as a storage form of methyl mercaptan and/or 3-methylthiopropionaldehyde.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 25, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Stephan Rautenberg, Sascha Ceylan, Martin Koerfer, Judith Hierold, Harald Jakob, Christian Kaiser, Rainer Malzkorn, Thorsten Merker, Anja Nordschild
  • Publication number: 20200299232
    Abstract: The present invention relates to a method for preparing 3-methylthiopropionaldehyde by reacting methyl mercaptan with acrolein, in which deviations in the stoichiometry of methyl mercaptan to acrolein in the reaction to give 3-methylthiopropionaldehyde are compensated for by supplying or by forming 1,3-bis(methylthio)-1-propanol, and also to the use of 1,3-bis(methylthio)-1-propanol as a storage form of methyl mercaptan and/or 3-methylthiopropionaldehyde.
    Type: Application
    Filed: March 14, 2017
    Publication date: September 24, 2020
    Inventors: Stephan RAUTENBERG, Sascha CEYLAN, Martin KOERFER, Judith HIEROLD, Harald JAKOB, Christian KAISER, Rainer MALZKORN, Thorsten MERKER, Anja NORDSCHILD
  • Patent number: 10556850
    Abstract: The present invention relates to a process for purifying acrolein. The process includes the steps of a) splitting a liquid feed stream containing acrolein into at least a first liquid stream and a second liquid stream, b) introducing the first liquid stream with a temperature T1 into a distillation column at a point between the top and the bottom of the distillation column, c) introducing the second liquid stream with a temperature T2 into the distillation column at the top of the distillation column, d) withdrawing an overhead vapor stream enriched in acrolein from the distillation column, and e) withdrawing a bottom stream depleted in acrolein. The temperature T2 of the second liquid stream in step c) is lower than the temperature T1 of the first liquid stream in step b).
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: February 11, 2020
    Assignee: Evonik Degussa GmbH
    Inventors: Thorsten Merker, Martin Koerfer, Michael Eicker, Bruno Krudewig, Rainer Malzkorn, Haohao Zhu
  • Publication number: 20200031751
    Abstract: The present invention relates to a process for purifying acrolein. The process includes the steps of a) splitting a liquid feed stream containing acrolein into at least a first liquid stream and a second liquid stream, b) introducing the first liquid stream with a temperature T1 into a distillation column at a point between the top and the bottom of the distillation column, c) introducing the second liquid stream with a temperature T2 into the distillation column at the top of the distillation column, d) withdrawing an overhead vapor stream enriched in acrolein from the distillation column, and e) withdrawing a bottom stream depleted in acrolein. The temperature T2 of the second liquid stream in step c) is lower than the temperature T1 of the first liquid stream in step b).
    Type: Application
    Filed: July 24, 2019
    Publication date: January 30, 2020
    Applicant: Evonik Degussa GmbH
    Inventors: Thorsten MERKER, Martin KOERFER, Michael EICKER, Bruno KRUDEWIG, Rainer MALZKORN, Haohao ZHU
  • Publication number: 20190322600
    Abstract: The present invention relates to a process for producing a particulate composition containing methionine, methionylmethionine, potassium in the form of potassium salt and ammonium sulphate, and use thereof.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 24, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Martin KOERFER, Hans Joachim HASSELBACH, Gerit NIGGEMANN, Antje HANSMEIER, Hans Christian ALT, Dominik EGLY, Peter SCHULTE
  • Patent number: 9649615
    Abstract: The present invention relates to a reactor and to a process for synthesis of hydrogen sulphide from elemental sulphur and hydrogen at elevated pressure and elevated temperature. The invention further relates to the use of the reactor for preparation of hydrogen sulphide in high yield and with a low H2Sx content.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: May 16, 2017
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Caspar-Heinrich Finkeldei, Chiu Kee Cheung, Ralf Maassen, Stefan Wenner, Martin Koerfer
  • Patent number: 9630843
    Abstract: The present invention relates to a reactor and to a process for synthesis of hydrogen sulphide from elemental sulphur and hydrogen at elevated pressure and elevated temperature. The invention further relates to the use of the reactor for preparation of hydrogen sulphide in high yield and with a low H2Sx content.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: April 25, 2017
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Caspar-Heinrich Finkeldei, Chiu Kee Cheung, Ralf Maassen, Geert Van Eester, Stefan Wenner, Martin Koerfer
  • Patent number: 9617209
    Abstract: The invention relates to a method for crystallizing D,L-methionine from aqueous solutions and/or suspensions containing D,L-methionine and D,L-methionine ammonium salts, having a Met content of 70-180 g/kg, an NH4+ content of 1-5 g/kg, in the presence of a crystallization additive, which comprises a nonionic or anionic surfactant or a mixture of various nonionic or anionic surfactants, in which the temperature of the solution and/or suspension is lowered directly or stepwise from T1=85-110° C. to T2=30-50° C., so that D,L-methionine precipitates as a solid.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: April 11, 2017
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Stefan Reichert, Harald Jakob, Hans Joachim Hasselbach, Martin Koerfer
  • Patent number: 9464045
    Abstract: This disclosure relates to a process for preparing D,L-methionine by feeding carbon dioxide to an aqueous potassium methioninate solution obtained by hydrolysis of 5-(2-methylmercaptoethyl)hydantoin, in order to precipitate out crude methionine, which is separated off and purified. In this process an aqueous solution of the separated-off crude methionine is purified by recrystallization from a solution containing potassium ions and also a crystallization additive. The crystallization additive is a nonionic or anionic surfactant, or a mixture of different nonionic or anionic surfactants. The recrystallization occurs by introducing a 60 to 110° C.-hot methionine solution into a 35 to 80° C.-warm methionine suspension, a temperature of which is lower than that of the introduced solution, such that the temperature of the methionine suspension being maintained between 35 and 80° C. during the addition. The crystallization additive is a sorbitan fatty acid ester or a mixture of different sorbitan fatty acid esters.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: October 11, 2016
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Martin Koerfer, Hans Joachim Hasselbach, Stefan Reichert, Harald Jakob, Christoph Weckbecker, Klaus Huthmacher, Horst Krull, Bernd Drapal, Rainer Peter
  • Patent number: 9440208
    Abstract: The present invention relates to a reactor and to a process for synthesis of hydrogen sulphide from elemental sulphur and hydrogen at elevated pressure and elevated temperature. The invention further relates to the use of the reactor for preparation of hydrogen sulphide in high yield and with a low H2SX content.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: September 13, 2016
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Caspar-Heinrich Finkeldei, Chiu Kee Cheung, Ralf Maassen, Stefan Wenner, Martin Koerfer
  • Patent number: 9421511
    Abstract: The present invention relates to a reactor and to a process for synthesis of hydrogen sulphide from elemental sulphur and hydrogen at elevated pressure and elevated temperature. The invention further relates to the use of the reactor for preparation of hydrogen sulphide in high yield and with a low H2Sx content.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: August 23, 2016
    Assignee: Evonik Degussa GmbH
    Inventors: Caspar-Heinrich Finkeldei, Chiu Kee Cheung, Ralf Maassen, Stefan Wenner, Martin Koerfer
  • Patent number: 9403764
    Abstract: A method for production of a methionine salt in a reactive rectification column containing a weir having a height of 100 mm or more is provided.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: August 2, 2016
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Hans Joachim Hasselbach, Martin Koerfer, Christof P. Gruener, Franz H. Hanrath, Juergen Stock, Jignesh Gangadwala, Horst Krull
  • Publication number: 20160068480
    Abstract: This disclosure relates to a process for preparing D,L-methionine by feeding carbon dioxide to an aqueous potassium methioninate solution obtained by hydrolysis of 5-(2-methylmercaptoethyl)hydantoin, in order to precipitate out crude methionine, which is separated off and purified. In this process an aqueous solution of the separated-off crude methionine is purified by recrystallization from a solution containing potassium ions and also a crystallization additive. The crystallization additive is a nonionic or anionic surfactant, or a mixture of different nonionic or anionic surfactants. The recrystallization occurs by introducing a 60 to 110° C.-hot methionine solution into a 35 to 80° C.-warm methionine suspension, a temperature of which is lower than that of the introduced solution, such that the temperature of the methionine suspension being maintained between 35 and 80° C. during the addition. The crystallization additive is a sorbitan fatty acid ester or a mixture of different sorbitan fatty acid esters.
    Type: Application
    Filed: September 10, 2015
    Publication date: March 10, 2016
    Applicant: EVONIK INDUSTRIES AG
    Inventors: Martin KOERFER, Hans Joachim HASSELBACH, Stefan REICHERT, Harald JAKOB, Christoph WECKBECKER, Klaus HUTHMACHER, Horst KRULL, Bernd DRAPAL, Rainer PETER
  • Patent number: 9206121
    Abstract: A method to produce D,L-Methionine from 2-hydroxy-4-(methylthio)butyronitrile by reaction with ammonia, optionally in the presence of carbon dioxide, is provided. The 2-hydroxy-4-(methylthio)butyronitrile is obtained by reaction of 3-methylmercaptopropionaldehyde with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of a multizone reactor. Residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: December 8, 2015
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
  • Patent number: 9156782
    Abstract: The invention relates to a process for the preparation of D,L-methionine, in which carbon dioxide is fed to an aqueous potassium methioninate solution obtained by hydrolysis of 5-(2-methylmercaptoethyl)hydantoin, in order to precipitate out crude methionine, which is separated off and purified, where, for the purposes of purification, an aqueous solution of the separated-off crude methionine is prepared and subjected to a recrystallization, characterized in that the solution from which the recrystallization takes place contains potassium ions and also a crystallization additive, where the crystallization additive is a nonionic or anionic surfactant, or a mixture of different nonionic or anionic surfactants, and that the recrystallization takes place by introducing a 60 to 110° C.-hot methionine solution into a 35 to 80° C.-warm methionine suspension, the temperature of which is lower than that of the introduced solution, the temperature of the methionine suspension being maintained between 35 and 80° C.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: October 13, 2015
    Assignee: EVONIK INDUSTRIES AG
    Inventors: Martin Koerfer, Hans Joachim Hasselbach, Stefan Reichert, Harald Jakob, Christoph Weckbecker, Klaus Huthmacher, Horst Krull, Bernd Drapal, Rainer Peter
  • Patent number: 9133113
    Abstract: A method for the production of 2-hydroxy-4-methylthiobutyric acid by hydrolysis of 2-hydroxy-4-(methylthio)butyronitrile is provided. 3-Methylmercaptopropionaldehyde is reacted with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of the multizone reactor to form a reaction mixture comprising the 2-hydroxy-4-(methylthio)butyronitrile, unreacted 3-methylmercaptopropionaldehyde, the catalyst and residual amounts of gaseous hydrogen cyanide. The residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: September 15, 2015
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi
  • Publication number: 20150197489
    Abstract: A method to produce D,L-Methionine from 2-hydroxy-4-(methylthio)butyronitrile by reaction with ammonia, optionally in the presence of carbon dioxide, is provided. The 2-hydroxy-4-(methylthio)butyronitrile is obtained by reaction of 3-methylmercapto-propionaldehyde with hydrogen cyanide in the presence of a base as catalyst in a main reaction zone of a multizone reactor. Residual gaseous hydrogen cyanide is removed from the main reaction zone to an absorption and post-reaction zone of the reactor which comprises a mixture of 3-methylmercaptopropionaldehyde and the catalyst; and the gaseous hydrogen cyanide is further reacted with the 3-methylmercaptopropionaldehyde in the absorption and post reaction zone. A molar ratio of hydrogen cyanide to 3-(methylthio)propanal in the main reaction zone is from 0.98 to 1.03.
    Type: Application
    Filed: March 27, 2015
    Publication date: July 16, 2015
    Applicant: Evonik Degussa GmbH
    Inventors: Dieter Buss, Martin Steurenthaler, Michael R. Rinner, Stephan Kretz, Hans Joachim Hasselbach, Caspar-Heinrich Finkeldei, Martin Koerfer, Pablo Zacchi