Patents Examined by Helane Meyers
  • Combination magnetic separation, classification and attrition process for renewing and recovering particulates
    Patent number: 5393412
    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: May 3, 1991
    Date of Patent: February 28, 1995
    Assignee: Ashland Oil, Inc.
    Inventor: William P. Hettinger