Patents by Inventor Herbert Neumann

Herbert Neumann 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).

  • 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, RĂ¼diger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • 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
  • 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, RĂ¼diger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Patent number: 5277887
    Abstract: To prepare essentially water-insoluble, long-chain ammonium polyphosphate, in a first stage, ammonium orthophosphate and phosphorus pentoxide are reacted in the presence of gaseous ammonia in a reactor equipped in its interior with mixing, kneading and comminution apparatus, until the drive motor of the reactor passes through the second current peak in its current consumption/time diagram. In a second stage, the material discharged from the reactor is then fed to a disk dryer, the heating disks of which are maintained at temperatures of 240.degree. to 300.degree. C., whereas its lower cooling disk has temperatures of 5.degree. to 45.degree. C. The material, which covers the disks of the disk dryer at a layer thickness of 5 to 20 mm, has a residence time of 35 to 70 minutes in the disk dryer, while ammonia-containing gas is continuously passed through the disk dryer.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: January 11, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Thomas Staffel, Wolfgang Becker, Herbert Neumann