Patents by Inventor Hans U. Suss

Hans U. Suss 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 bleaching cellulose with organic peracid
    Patent number: 4400237
    Abstract: Cellulose is bleached by means of an organic peracid in the acid region and subsequently by means of peroxide in the alkaline region. As peracid there is employed an acid which is produced from the corresponding carboxylic acid by reaction with hydrogen peroxide in the presence of a mineral acid. The peroxide bleaching step which follows the peracid bleaching step is carried out after there is added the necessary amount of aqueous alkali solution for carrying out the peroxide bleaching step of the pulp without intermediate washing of the cellulose. A further addition of peroxide is not carried out.
    Type: Grant
    Filed: February 6, 1981
    Date of Patent: August 23, 1983
    Assignee: Degussa Aktiengesellschaft
    Inventors: Horst Kruger, Wilhelm Berndt, Hans U. Suss