Patents by Inventor Roger Van Driesen

Roger Van Driesen 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).

  • Processes for regenerating catalysts contaminated with carbonaceous materials
    Patent number: 5217935
    Abstract: Processes for the regeneration of catalysts, such as hydrogenation catalysts, and the defouling of objects, which are contaminated with carbonaceous deposits. The catalyst or object is contacted with water, oxygen-containing gas, and at least one alkaline material maintained at a pH of at least 7.0, and at a temperature and pressure sufficient to combust at least a portion of the carbonaceous deposits. The process of the present invention enables one to remove carbonaceous deposits from catalysts or contaminated the leaching of metals from the catalysts or objects by acidic by-products of the combustion process.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: June 8, 1993
    Assignee: ABB Lummus Crest Inc.
    Inventor: Roger Van Driesen