Patents by Inventor Kai G. Nirell

Kai G. Nirell 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).

  • Delayed coking process and method of formulating delayed coking feed charge
    Patent number: 6048448
    Abstract: A process for upgrading petroleum residua to more valuable products by visbreaking or otherwise thermally cracking a petroleum residuum to produce a thermally cracked bottoms stream, vacuum distilling at least a portion of the thermally cracked bottoms stream to produce a vacuum distilled thermally cracked pitch, blending a portion of the pitch with a hydrocarbon residuum that is not a vacuum distilled thermally cracked pitch to produce a delayed coker feed component, producing a delayed coker heater charge having a recycle ratio, by weight, of less than about 1.27:1, and introducing the coker heater charge into a delayed coker.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: April 11, 2000
    Assignee: The Coastal Corporation
    Inventor: Kai G. Nirell