Patent ID: 9289739
Filing Date: 2016-03-22
CPC Classification: B01J

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