Patents by Inventor Matthias MENDORF

Matthias MENDORF 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).

  • Coupling of distillative purification with a partial condenser for pre-purification of isophoronediamine
    Patent number: 10343975
    Abstract: A process for fine purification of isophoronediamine (IPDA), including producing IPDA by aminating hydrogenation of isophorone nitrile in the presence of at least ammonia, hydrogen, a a hydrogenation catalyst and optionally further additions to obtain a crude IPDA, and subjecting the crude IPDA to a fine purification via two vacuum distillation columns, wherein in the first vacuum distillation column the removal of any remaining relatively low-boiling byproducts is effected and in the second vacuum distillation column the IPDA is obtained in pure form as tops and thus separated from the organic residues, and wherein the first vacuum distillation column has vacuum distillation column has a partial condenser fitted to it.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: July 9, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Anne Rittsteiger, Alexander Martin Rüfer, Guido Streukens, Stephan Kohlstruk, Matthias Orschel, Matthias Mendorf, Jorn Walscharts, Axel Hengstermann, Anja Müller
  • COUPLING OF DISTILLATIVE PURIFICATION WITH A PARTIAL CONDENSER FOR PRE-PURIFICATION OF ISOPHORONEDIAMINE
    Publication number: 20170298003
    Abstract: A process for fine purification of isophoronediamine (IPDA), including producing IPDA by aminating hydrogenation of isophorone nitrile in the presence of at least ammonia, hydrogen, a a hydrogenation catalyst and optionally further additions to obtain a crude IPDA, and subjecting the crude IPDA to a fine purification via two vacuum distillation columns, wherein in the first vacuum distillation column the removal of any remaining relatively low-boiling byproducts is effected and in the second vacuum distillation column the IPDA is obtained in pure form as tops and thus separated from the organic residues, and wherein the first vacuum distillation column has vacuum distillation column has a partial condenser fitted to it.
    Type: Application
    Filed: March 30, 2017
    Publication date: October 19, 2017
    Inventors: Anne Rittsteiger, Alexander Martin Rüfer, Guido Streukens, Stephan Kohlstruk, Matthias Orschel, Matthias Mendorf, Jorn Walscharts, Axel Hengstermann, Anja Müller
  • PROCESS FOR THE ELECTROCHEMICAL PRODUCTION OF 2,2,4-TRIMETHYLADIPIC ACID AND 2,4,4-TRIMETHYLADIPIC ACID
    Publication number: 20150225861
    Abstract: A process for the electrochemical production of 2,2,4-trimethyladipic acid and 2,4,4-trimethyladipic acid by electrochemical oxidative ring cleavage of a mixture of cis- and trans-3,3,5-trimethylcyclohexanol.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 13, 2015
    Applicant: EVONIK INDUSTRIES AG
    Inventors: Carl-Friedrich HOPPE, Stephan KOHLSTRUK, Manfred KRECZINSKI, Matthias MENDORF, Holger WIEDERHOLD
  • Hydrolysis of the residues obtained in the production of isophorone to recover isophorone and acetone
    Patent number: 9035102
    Abstract: A process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) is provided wherein distillation vapors from the work-up of product fractions are recycled to earlier stages of operation of the process.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: May 19, 2015
    Assignee: Evonik Industries AG
    Inventors: Joerg-Joachim Nitz, Stephan Kohlstruk, Robert Jansen, Matthias Orschel, Andreas Merkel, Michael Demming, Matthias Mendorf, Jens Doering, Axel Hengstermann, Andreas Hoff, Anja Mueller
  • HYDROLYSIS OF THE RESIDUES OBTAINED IN THE PRODUCTION OF ISOPHORONE TO RECOVER ISOPHORONE AND ACETONE
    Publication number: 20150045585
    Abstract: A process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) is provided wherein distillation vapors from the work-up of product fractions are recycled to earlier stages of operation of the process.
    Type: Application
    Filed: August 8, 2014
    Publication date: February 12, 2015
    Applicant: Evonik Industries AG
    Inventors: Joerg-Joachim NITZ, Stephan KOHLSTRUK, Robert JANSEN, Matthias ORSCHEL, Andreas MERKEL, Michael DEMMING, Matthias MENDORF, Jens DOERING, Axel HENGSTERMANN, Andreas HOFF, Anja MUELLER