Continuous preparation of calcined chemically-treated solid oxides
First Claim
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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;
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(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.
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Abstract
The present invention discloses a continuous calcination vessel which can be used to prepare calcined chemically-treated solid oxides from solid oxides and chemically-treated solid oxides. A process for the continuous preparation of calcined chemically-treated solid oxides is also provided. Calcined chemically-treated solid oxides disclosed herein can be used in catalyst compositions for the polymerization of olefins.
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Citations
18 Claims
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1. A process for continuously preparing a calcined chemically-treated solid oxide comprising:
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(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; andcontacting 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 Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for continuously preparing a calcined chemically-treated solid oxide comprising:
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(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;
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(ii) introducing a chemically-treated solid oxide into a continuous calcination vessel comprising a fluidized bed; andcontacting 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; 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; wherein the fluidized bed comprises at least one zone dividing wall for dividing the fluidized bed into a plurality of heating zones capable of independent temperature control and independent fluidizing gas control. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification