Patents by Inventor Stefanie Sohnemann

Stefanie Sohnemann 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 hydrolysing acetone cyanohydrin
    Patent number: 9458083
    Abstract: The present invention relates to a process for hydrolysis of acetone cyanohydrin (ACH) by means of sulphuric acid within the ACH sulpho process for preparation of methacrylic acid (MAA) or methyl methacrylate (MMA).
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: October 4, 2016
    Assignee: EVONIK ROEHM GmbH
    Inventors: Arndt Selbach, Lorenza Sartorelli, Andreas Perl, Joachim Deinken, Stefanie Sohnemann, Norbert Mnich, Matthias Groemping, Udo Gropp, Thomas Mertz
  • Metering ring
    Patent number: 9169194
    Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 27, 2015
    Assignee: EVONIK RÖHM GmbH
    Inventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
  • METHOD FOR HYDROLYSING ACETONE CYANOHYDRIN
    Publication number: 20150045577
    Abstract: The present invention relates to a process for hydrolysis of acetone cyanohydrin (ACH) by means of sulphuric acid within the ACH sulpho process for preparation of methacrylic acid (MAA) or methyl methacrylate (MMA).
    Type: Application
    Filed: March 6, 2013
    Publication date: February 12, 2015
    Applicant: Evonik Roehm GmbH
    Inventors: Arndt Selbach, Lorenza Sartorelli, Andreas Perl, Joachim Deinken, Stefanie Sohnemann, Norbert Mnich, Matthias Groemping, Udo Gropp, Thomas Mertz
  • Method for producing methacrylic acid
    Patent number: 8575388
    Abstract: The present invention relates to a method for producing methacrylic acid by reacting methacrylamide with water, wherein said reaction is performed continuously in a tube reactor and a pressure differential exists in the flow direction of the reaction mixture inside said tube reactor. Furthermore, the present invention discloses a facility for carrying out the method according to the invention.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: November 5, 2013
    Assignee: Evonik Roehm GmbH
    Inventors: Udo Gropp, Stefanie Sohnemann, Guido Protzmann, Thomas Mertz
  • METERING RING
    Publication number: 20130211140
    Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 15, 2013
    Inventors: Lorenza SARTORELLI, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
  • Method for purifying methacrylic acid
    Patent number: 8389762
    Abstract: The present invention relates to a process for purifying methacrylic acid, wherein the reaction mixture obtained by a reaction of methacrylamide with water is cooled by mixing with an aqueous medium and then passed into a phase separator. The present invention further describes a system for performing the process according to the invention.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: March 5, 2013
    Assignee: Evonik Röhm GmbH
    Inventors: Udo Gropp, Stefanie Sohnemann, Guido Protzmann, Thomas Mertz
  • METERING RING
    Publication number: 20120010430
    Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.
    Type: Application
    Filed: March 26, 2010
    Publication date: January 12, 2012
    Applicant: Evonik Roehm GmbH
    Inventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
  • METHOD FOR PRODUCING METHACRYLIC ACID
    Publication number: 20120004460
    Abstract: The present invention relates to a method for producing methacrylic acid by reacting methacrylamide with water, wherein said reaction is performed continuously in a tube reactor and a pressure differential exists in the flow direction of the reaction mixture inside said tube reactor. Furthermore, the present invention discloses a facility for carrying out the method according to the invention.
    Type: Application
    Filed: January 13, 2009
    Publication date: January 5, 2012
    Applicant: Evonik Roehm GmbH
    Inventors: Udo Gropp, Stefanie Sohnemann, Guido Protzmann, Thomas Mertz
  • METHOD FOR PRODUCING METHACRYLIC ACID
    Publication number: 20100331572
    Abstract: The present invention relates to a method for producing methacrylic acid by reacting methacrylamide with water, wherein said reaction is performed continuously in a tube reactor and a pressure differential exists in the flow direction of the reaction mixture inside said tube reactor. Furthermore, the present invention discloses a facility for carrying out the method according to the invention.
    Type: Application
    Filed: January 3, 2009
    Publication date: December 30, 2010
    Applicant: Evonik Roehm GmbH
    Inventors: Udo Gropp, Stefanie Sohnemann, Guido Protzmann, Thomas Mertz
  • METHOD FOR PURIFYING METHACRYLIC ACID
    Publication number: 20100314239
    Abstract: The present invention relates to a process for purifying methacrylic acid, wherein the reaction mixture obtained by a reaction of methacrylamide with water is cooled by mixing with an aqueous medium and then passed into a phase separator. The present invention further describes a system for performing the process according to the invention.
    Type: Application
    Filed: January 13, 2009
    Publication date: December 16, 2010
    Applicant: EVONIK ROEHM GMBH
    Inventors: Udo Gropp, Stefanie Sohnemann, Guido Protzmann, Thomas Mertz