Patents by Inventor Walter L. Heitz

Walter L. Heitz 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: 4874397
    Abstract: Deposits of flyslag on the walls of a heat exchange zone employed to quench and cool synthesis gas and flyslag particles produced from the gasification of coal may be reduced by (a) temporarily increasing the flow rate of the synthesis gas and flyslag particles during the process to a space velocity of greater than at least 12 meters per second; or (b) after a shutdown or incident where flyslag is deposited, utilizing a space velocity of the synthesis gas and flyslag of greater than 12 meters per second for a time sufficient to remove the deposits, and then utilizing flow rates which prevent or inhibit deposition of flyslag.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: October 17, 1989
    Assignee: Shell Oil Company
    Inventor: Walter L. Heitz