Fluidized process for improving the quality of a particulate regenerated solid
AssigneeBar-Co Processes Joint Venture
InventorDavid B. Bartholic
Life of this patent
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Abstract
A fluidized solid process for upgrading or converting a hydrocarbon feedstock wherein carbonaceous deposits accumulate on a particulate fluidized solid and are burned in a regenerator to regenerate the solid, the regenerated solid and entrained combustion products are introduced into a vertical lift pipe, a fluid lift medium is introduced into the lift pipe and the regenerated solid is separated from the lift medium and combustion products to improve the quality of the regenerated solid contacted with the hydrocarbon feedstock.
Claims23
In a fluidized solid process wherein a fluidized particulate solid is contacted in a contacting zone with a hydrocarbon feedstock and becomes spent as a result of accumulating carbonaceous deposits thereon, fluidized spent solid is circulated to a regenerator in which the carbonaceous deposits are burned so as to regenerate the solid and regenerated solid is circulated to the contacting zone, the improvement comprising:
- (a) withdrawing hot fluidized regenerated solid and entrained combustion products from the regenerator;
- (b) introducing the withdrawn regenerated solid and entrained combustion products into a lower portion of an elongated vertical lift pipe;
- (c) introducing a fluid lift medium into a lower portion of said lift pipe to intimately contact the regenerated solid therein;
- (d) passing a stream of the fluidized regenerated solid, entrained combustion products and lift medium upwardly in said lift pipe to an upper portion thereof;
- (e) passing said stream to a separation zone and separating therein regenerated solid from said lift medium and combustion products;
- (f) passing the separated regenerated solid having a reduced amount of entrained combustion products to said contacting zone for contact therein with said hydrocarbon feedstock;
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- (g) recycling separated lift medium to said lift pipe to intimately contact the regenerated solid therein.
Dependencies are inferred from the claim text.