| US 7,598,197 B2 | ||
| Catalyst cooling processes utilizing steam superheating | ||
| James R. Lattner, Seabrook, Tex. (US); Christopher L. Becker, Russell, Kans. (US); and James H. Beech, Jr., Kingwood, Tex. (US) | ||
| Assigned to ExxonMobil Chemical Patents Inc., Houston, Tex. (US) | ||
| Filed on Feb. 03, 2005, as Appl. No. 11/50,574. | ||
| Claims priority of provisional application 60/638734, filed on Dec. 22, 2004. | ||
| Prior Publication US 2006/0135358 A1, Jun. 22, 2006 | ||
| Int. Cl. B01J 38/12 (2006.01); B01J 38/16 (2006.01) | ||
| U.S. Cl. 502—38 [502/20; 502/51; 502/55; 502/514] | 20 Claims |
| 1. 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;
wherein the cooling occurs in one or more heat exchangers comprising a first cooling surface and a second cooling surface,
the first cooling surface having a first surface area dedicated to superheating steam and the second cooling surface having
a second surface area dedicated to boiling water, and wherein the ratio of the first surface area to the second surface area
can be adjusted.
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