Patents by Inventor Hermann Berwe

Hermann Berwe 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).

  • Ethylene treatment by gas permeation
    Patent number: 6478851
    Abstract: The invention relates to a process for separating off ethylene from a gas mixture comprising more than 8% by volume of carbon dioxide or oxygen, by gas permeation.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: November 12, 2002
    Assignee: Axiva GmbH
    Inventors: Hermann Berwe, Rüdiger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Ethylene treatment by gas permeation
    Publication number: 20020087032
    Abstract: The invention relates to a process for preparing carbonyl compounds from olefins and an oxidizing agent in which the olefin is oxidized in a reactor, a reaction gas mixture which comprises unoxidized olefin being formed, which comprises separating off unoxidized olefin at least in part from the reaction gas mixture by a membrane process.
    Type: Application
    Filed: January 3, 2002
    Publication date: July 4, 2002
    Applicant: Axiva GmbH, a corporation of Germany
    Inventors: Hermann Berwe, Rudiger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Preparation of ethylene by gas permeation
    Patent number: 6365784
    Abstract: The invention relates to a process for preparing carbonyl compounds from olefins and an oxidizing agent in which the olefin is oxidized in a reactor, a reaction gas mixture which comprises unoxidized olefin being formed, which comprises separating off unoxidized olefin at least in part from the reaction gas mixture by a membrane process.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: April 2, 2002
    Assignee: Axiva GmbH
    Inventors: Hermann Berwe, Rüdiger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Preparation of methyltris(m-sulfonatophenyl) phosphonium iodide trisodium salt and use thereof in carbonylation reactions to prepare carboxylic acids and/or their esters
    Patent number: 5403954
    Abstract: In a process for preparing methyltris(m-sulfonatophenyl)phosphonium iodide trisodium salt, the sodium salt of trisulfonated triphenylphosphine and methanol are introduced as the initial charge, a solution of methyl iodide in methanol is added dropwise at elevated temperature, and after an additional reaction time the reaction product is evaporated to dryness in vacuo.Methyltris(m-sulfonatophenyl)phosphonium iodide trisodium salt can be used to prepare carboxylic acids and/or their esters by carbonylation of saturated aliphatic alcohols having from 1 to 20 carbon atoms or their halo, ester or ether derivatives over a rhodium catalyst in the presence of water and methyl iodide under a CO partial pressure of from 0.3 to 200 bar at a temperature of from 100.degree. to 240.degree. C., provided methyltris(m-sulfonatophenyl)phosphonium iodide trisodium salt and carboxylic acid are added to the liquid phase prior to carbonylation.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: April 4, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Heymanns, Erhard Jagers, Andreas Seidel, Hermann Berwe