Patents by Inventor Geert Van Eester

Geert Van Eester 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).

  • PROCESS FOR THE DIASTEREOMERICALLY PURE PREPARATION OF DL/LD-METHIONYLMETHIONINE
    Publication number: 20240083858
    Abstract: The invention relates in particular to a process for the preparation of DL/LD-methionine diketopiperazine (I) characterized in that a DD/LL-methionylmethionine-containing aqueous solution or suspension, which has a pH of 3 to 7, measured using a pH electrode at 20° C., is reacted at a temperature of 150 to 220° C., preferably at 170 to 210° C., until an aqueous solution or suspension has formed containing at least a proportion of 30 mol %, preferably 50 mol %, especially 60 mol % of DL/LD-methionine diketopiperazine, based on the total content of DL/LD- and DD/LL-methionine diketopiperazine in the reaction mixture. This process forms part of an overall process for the preparation of DL/LD-methionylmethionine, which is obtained by hydrolysis from the DL/LD-methionine diketopiperazine (I) produced initially.
    Type: Application
    Filed: December 23, 2021
    Publication date: March 14, 2024
    Applicant: Evonik Operations GmbH
    Inventors: Sascha BRAUNE, Geert VAN EESTER, Hans-Joachim HASSELBACH, Claudia DYBALLA
  • Reactor and process for preparing hydrogen sulphide
    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
  • REACTOR AND PROCESS FOR PREPARING HYDROGEN SULPHIDE
    Publication number: 20150175419
    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: Application
    Filed: May 31, 2013
    Publication date: June 25, 2015
    Applicant: EVONIK INDUSTRIES AG
    Inventors: Caspar-Heinrich Finkeldei, Chiu Kee Cheung, Ralf Maassen, Geert Van Eester, Stefan Wenner, Martin Koerfer