Patents by Inventor Daniel SUDHOFF

Daniel SUDHOFF 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).

  • METHOD FOR PRODUCING METHIONINE
    Publication number: 20220048855
    Abstract: The present invention pertains to a method for producing methionine or salts or derivatives thereof from hydrogen cyanide (HCN), the method comprising a step of producing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN), or a crude product mixture comprising MMP-CN, by contacting a hydrogen cyanide (HCN) process gas mixture prepared according to the Andrussow process from methane, ammonia and oxygen, with 3-methylmercaptopropionaldehyde (MMP), wherein the HCN process gas mixture is obtained from the crude HCN process gas mixture by adjusting the amount of ammonia to between 20% (v/v) and 60% (v/v) of the amount of the ammonia in the crude HCN process gas mixture.
    Type: Application
    Filed: December 13, 2019
    Publication date: February 17, 2022
    Applicant: EVONIK OPERATIONS GMBH
    Inventors: Daniel SUDHOFF, Judith HIEROLD, Philipp ROTH, Imad MOUSSALLEM, Ulf BINDERNAGEL, Christian RENNER
  • Method for preparing methionine
    Patent number: 10899706
    Abstract: The present invention relates to a method for preparing methionine or methionine salts. In particular, the invention describes the step of preparing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN) from 3-methylthiopropanal (MMP) and hydrogen cyanide (HCN) in the presence of ammonia by bringing a gaseous mixture comprising HCN and ammonia into contact with MMP.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: January 26, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Judith Hierold, Daniel Sudhoff, Martin Steurenthaler, Hans Joachim Hasselbach, Philipp Roth, Thorsten Merker, Markus Held, Daniel Fischer, Christian Kaiser
  • METHOD FOR PREPARING METHIONINE
    Publication number: 20200115334
    Abstract: The present invention relates to a method for preparing methionine or methionine salts. In particular, the invention describes the step of preparing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN) from 3-methylthiopropanal (MMP) and hydrogen cyanide (HCN) in the presence of ammonia by bringing a gaseous mixture comprising HCN and ammonia into contact with MMP.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 16, 2020
    Applicant: Evonik Degussa GmbH
    Inventors: Judith HIEROLD, Daniel SUDHOFF, Martin STEURENTHALER, Hans Joachim HASSELBACH, Philipp ROTH, Thorsten MERKER, Markus HELD, Daniel FISCHER, Christian KAISER