Catalyst cooling processes utilizing steam superheating
AssigneeExxonMobil Chemical Patents Inc.
InventorsJames Lattner, Christopher Becker, James Beech
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Abstract
This invention provides processes, systems and devices for cooling catalyst, preferably regenerated catalyst, by superheating steam and boiling water. The inventive process advantageously provides ideal cooling conditions while ensuring minimal hydrothermal deactivation of the catalyst during the cooling process. The invention is particularly well-suited for cooling catalyst in an oxygenate to olefins reaction system.
Claims61
A process for cooling catalyst in an oxygenate to olefins reaction system, wherein the process comprises the step of:
- (a) cooling a hot catalyst by superheating steam and boiling water to form a cold catalyst.
A process for cooling catalyst in an oxygenate to olefins reaction system, wherein the process comprises the step of:
- (a) cooling a hot catalyst by superheating steam to form a cool catalyst;
- and
- (b) cooling the cool catalyst by boiling water to form a cold catalyst.
A process for regenerating catalyst, wherein the process comprises the steps of:
- (a) regenerating an at least partially coked catalyst particle to form a regenerated catalyst particle having a temperature greater than about 593° C.;
- and
- (b) cooling the regenerated catalyst particle by at least about 38° C. through superheating steam and boiling water, but to a temperature of no less than 316° C., at a regeneration pressure of less than about 10,343 kpag, to form a cold catalyst.
Dependencies are inferred from the claim text.