Patents Examined by William H. Terrell
  • Combination magnetic separation, classification and attrition process for renewing and recovering particulates
    Patent number: 5636747
    Abstract: Optimized utilization of combinations of fluid catalyst magnetic separator, classifier, and/or attriter can be used to achieve lower catalyst cost, and better catalyst activity and selectivity through control of metal-on-catalyst, particle size and particle size distribution. This process is especially useful when processing high metal-containing feedstocks. This provides a catalyst recovery unit (RCU.TM.) ancillary to an FCC or similar unit.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: June 10, 1997
    Assignee: Ashland Inc.
    Inventors: William P. Hettinger, Jr., Howard F. Moore, Terry L. Goolsby, A. V. Peppard