| US 7,578,984 B2 | ||
| Regeneration of caustic solutions | ||
| Charles F. Maitland, Sugarland, Tex. (US) | ||
| Assigned to Fluor Technologies Corporation, Aliso Viejo, Calif. (US) | ||
| Appl. No. 10/478,702 PCT Filed Feb. 22, 2002, PCT No. PCT/US02/05630 § 371(c)(1), (2), (4) Date Apr. 26, 2004, PCT Pub. No. WO03/072224, PCT Pub. Date Sep. 04, 2003. |
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| Prior Publication US 2004/0170543 A1, Sep. 02, 2004 | ||
| Int. Cl. C01D 3/06 (2006.01); B01J 38/64 (2006.01); C10G 19/08 (2006.01); C10G 29/20 (2006.01); B01J 10/00 (2006.01) | ||
| U.S. Cl. 423—183 [423/182; 502/25; 208/235; 422/129] | 7 Claims |
| 5. A method of regenerating caustic comprising:
feeding into a lower portion of an oxidizer tower an oxygen recycle stream, an oxygen-containing stream, and a mixture of
spent caustic and oxidation catalyst;
co-currently contacting the mixture of spent caustic and oxidation catalyst with the oxygen recycle stream and the oxygen-containing
stream to so produce regenerated caustic;
withdrawing the regenerated caustic from the oxidizer tower; and
recycling an oxygen recycle stream from an upper vent opening of the oxidizer tower to a lower feed opening of the oxidizer
tower, wherein the oxygen recycle stream is substantially free of waste gases.
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