Continuous preparation of calcined chemically-treated solid oxides

• US 10,040,044 B2
• Filed: 08/15/2017
• Issued: 08/07/2018
• Est. Priority Date: 06/23/2009
• Status: Active Grant

• Current Assignee: Chevron Phillips Chemical Company LP (Chevron Corp.)
• Original Assignee: Chevron Phillips Chemical Company LP (Chevron Corp.)
• Inventors: Benham, Elizabeth A., McDaniel, Max P.
• Primary Examiner(s): Young, Natasha E
• Application Number:
  US15/677,131
• Publication Number:
  US 20170341045A1
• Time in Patent Office: 357 Days
• CPC Class Codes: B01J 2208/00176 outside the reactor
• CPC Class Codes: B01J 2208/0053 Controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
• CPC Class Codes: B01J 2208/00548 Flow
• CPC Class Codes: B01J 2208/0084 inside the bed, e.g. baffles
• CPC Class Codes: B01J 2208/00938 Flow distribution elements
• CPC Class Codes: B01J 2219/182 horizontal
• CPC Class Codes: B01J 2531/48 Zirconium
• CPC Class Codes: B01J 31/143 of aluminium
• CPC Class Codes: B01J 31/2295 Cyclic compounds, e.g. cyclopentadienyls
• CPC Class Codes: B01J 6/004 using hot gas streams in which the material is moved
• CPC Class Codes: B01J 8/1827 the fluidising gas being a reactant
• CPC Class Codes: B01J 8/1836 Heating and cooling the reactor B01J8/42 takes precedence
• CPC Class Codes: B01J 8/34 with stationary packing material in the fluidised bed, e.g. bricks, wire rings, baffles
• CPC Class Codes: B01J 8/36 with fluidised bed through which there is an essentially horizontal flow of particles

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.

Claims

1. A continuous calcination vessel comprising:

(a) a fluidized bed vessel comprising 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;

(b) a particulate material inlet capable of introducing inlet particulate material into the fluidized bed vessel;

(c) a fluidizing gas inlet capable of introducing a fluidizing gas into the fluidized bed vessel;

(d) a fluidizing gas path capable of directing the fluidizing gas from the fluidizing gas inlet into the fluidized bed vessel to fluidize the inlet particulate material; and

(e) an outlet capable of removing outlet particulate material from the fluidized bed vessel;

wherein;

each heating zone comprises at least one baffle;

the fluidized bed vessel contains sufficient baffles to cause a substantially plug flow profile through the fluidized bed vessel; and

the fluidized bed vessel has a slope from horizontal of less than about 15 degrees.

2. The continuous calcination vessel of claim 1, wherein the inlet particulate material comprises a solid oxide, a chemically-treated solid oxide, or a combination thereof.

3. The continuous calcination vessel of claim 1, wherein the outlet particulate material comprises a calcined chemically-treated solid oxide.

4. The continuous calcination vessel of claim 1, wherein each baffle contains apertures located on alternating opposite edges of the baffles to cause a serpentine flow profile through the fluidized bed vessel.

5. The continuous calcination vessel of claim 1, wherein the fluidizing gas inlet comprises a gas distributor plate, nozzle, hole, screen, dispensing head, or any combination thereof.

6. The continuous calcination vessel of claim 1, wherein the fluidized bed vessel comprises a first heating zone and a second heating zone, wherein:

the fluidizing gas in the first heating zone comprises air, nitrogen, argon, hydrogen, oxygen, carbon monoxide, water, or any combination thereof; and

the fluidizing gas in the second heating zone comprises helium, neon, argon, nitrogen, or any combination thereof.

7. The continuous calcination vessel of claim 1, wherein the fluidized bed vessel has a slope from horizontal of less than about 10 degrees.

8. The continuous calcination vessel of claim 1, wherein the fluidized bed vessel has a slope from horizontal of less than about 5 degrees.

9. The continuous calcination vessel of claim 1, wherein the continuous calcination vessel is further configured to reduce a residual oxygen content of the outlet particulate material to less than about 100 ppm, a residual moisture content of the outlet particulate oxide to less than about 100 ppm, or a combination thereof.

10. A continuous calcination vessel comprising:

(a) a fluidized bed vessel comprising 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;

(b) a particulate material inlet capable of introducing inlet particulate material into the fluidized bed vessel;

(c) a fluidizing gas inlet capable of introducing a fluidizing gas into the fluidized bed vessel;

(d) a fluidizing gas path capable of directing the fluidizing gas from the fluidizing gas inlet into the fluidized bed vessel to fluidize the inlet particulate material;

(e) an outlet capable of removing outlet particulate material from the fluidized bed vessel; and

(f) a filter apparatus adapted to remove a portion of the inlet particulate material, the outlet particulate material, or both, entrained in the fluidizing gas;

wherein the fluidized bed vessel has a slope from horizontal of less than about 15 degrees.

11. The continuous calcination vessel of claim 10, wherein the filter apparatus is further configured to recycle a filtered portion of the inlet particulate material, the outlet particulate material, or both, back to the same or an upstream location in the continuous calcination vessel, wherein less than 1% by weight of the respective inlet particulate material, outlet particulate material, or both, is lost overhead.

12. The continuous calcination vessel of claim 10, wherein the fluidized bed vessel comprises a first heating zone and a second heating zone, wherein:

the fluidizing gas in the first heating zone comprises air, nitrogen, argon, hydrogen, oxygen, carbon monoxide, water, or any combination thereof; and

the fluidizing gas in the second heating zone comprises helium, neon, argon, nitrogen, or any combination thereof.

13. The continuous calcination vessel of claim 10, wherein the fluidizing gas inlet comprises a gas distributor plate, nozzle, hole, screen, dispensing head, or any combination thereof.

14. The continuous calcination vessel of claim 10, wherein the fluidized bed vessel has a slope from horizontal of less than about 10 degrees.

15. The continuous calcination vessel of claim 10, wherein the fluidized bed vessel has a slope from horizontal of less than about 5 degrees.

16. A continuous calcination vessel comprising:

(a) a fluidized bed vessel comprising 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;

(b) a particulate material inlet capable of introducing inlet particulate material into the fluidized bed vessel;

(c) a fluidizing gas inlet capable of introducing a fluidizing gas into the fluidized bed vessel;

(d) a fluidizing gas path capable of directing the fluidizing gas from the fluidizing gas inlet into the fluidized bed vessel to fluidize the inlet particulate material;

(e) an outlet capable of removing outlet particulate material from the fluidized bed vessel; and

(f) a cooling system downstream of the outlet of the fluidized bed vessel;

wherein the fluidized bed vessel has a slope from horizontal of less than about 15 degrees.

17. The continuous calcination vessel of claim 16, wherein the cooling system further comprises:

a fluidizing cooling gas inlet capable of introducing a fluidizing cooling gas into the cooling system;

a fluidizing cooling gas path capable of directing the fluidizing cooling gas from the fluidizing gas inlet into the cooling system to fluidize the outlet particulate material; and

a filter apparatus adapted to remove a portion of the outlet particulate material entrained in the fluidizing cooling gas.

18. The continuous calcination vessel of claim 16, wherein the outlet particulate material comprises a calcined chemically-treated solid oxide.

19. The continuous calcination vessel of claim 16, wherein the fluidized bed vessel has a slope from horizontal of less than about 10 degrees.

20. The continuous calcination vessel of claim 16, wherein the fluidized bed vessel has a slope from horizontal of less than about 5 degrees.