Patents by Inventor Jorg Kemnade

Jorg Kemnade 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: 4759921
    Abstract: An aqueous hydrogen peroxide extract which contains small amounts of dispersed working solution and a working solution which contains small amounts of dispersed aqueous hydrogen peroxide are collected in the extraction stage of the anthraquinone method for preparing hydrogen peroxide. In order to purify these solutions, the working solution is compounded with aqueous hydrogen peroxide or preferably with water and the hydrogen peroxide extract is compounded with an organic dissolving mixture, preferably a quinone dissolver, and the respective dispersed phase is separated out with the aid of coalescers in a separator unit. It is especially preferable to add 1-3% by volume water or 1-3% quinone dissolver before the coalescer stages and to use coalescers with a drop-enlarging design and filter layers consisting of thermally desized glass filament yarn.
    Type: Grant
    Filed: October 1, 1987
    Date of Patent: July 26, 1988
    Assignee: Degussa AG
    Inventors: Wolfgang Kunkel, Gustaaf Goor, Jorg Kemnade
  • Patent number: 4428923
    Abstract: There is provided a continuous parallel current flow process for carrying out the catalytic hydrogenation with hydrogen or a hydrogen containing gas for the production of hydrogen peroxide in the anthraquinone process using palladium black suspended in the working solution at a temperature up to 100.degree. C. and a pressure up to 15 bar absolute in a reaction space constructed as a meandering tube system in which the hydrogenation is carried out in a loop reactor made of tubes of the same nominal diameter and arranged either vertically or horizontally and connected by curving tubes (tube elbows) at flow velocities in the tubes of more than 3 m/sec.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: January 31, 1984
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Kunkel, Jorg Kemnade, Dietrich Schneider