×

Continuous preparation of calcined chemically-treated solid oxides

  • US 9,289,739 B2
  • Filed: 06/23/2009
  • Issued: 03/22/2016
  • Est. Priority Date: 06/23/2009
  • Status: Active Grant
First Claim
Patent Images

1. A process for continuously preparing a calcined chemically-treated solid oxide comprising:

  • (a) (i) introducing a solid oxide into a continuous calcination vessel comprising a fluidized bed; and

    contacting the solid oxide with a compound and a first agent at a calcination temperature for an average residence time to produce the calcined chemically-treated solid oxide;

    or 

    (ii) introducing a chemically-treated solid oxide into a continuous calcination vessel comprising a fluidized bed; and

    contacting the chemically-treated solid oxide with a first agent at a calcination temperature for an average residence time to produce the calcined chemically-treated solid oxide;

    (b) contacting the calcined chemically-treated solid oxide with a second agent in the continuous calcination vessel, downstream of the continuous calcination vessel, or a combination thereof; and

    (c) recycling a filtered portion of the solid oxide, the chemically-treated solid oxide, and/or the calcined chemically-treated solid oxide back to the same or an upstream location in the continuous calcination vessel, wherein less than 1% by weight of the respective solid oxide, chemically-treated solid oxide and/or the calcined chemically-treated solid oxide is lost overhead;

    wherein the fluidized bed has a slope from horizontal in a range from about 5 degrees to less than about 15 degrees.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×