| US 7,615,663 B2 | ||
| Optimized production of aromatic dicarboxylic acids | ||
| Robert Lin, Kingsport, Tenn. (US); and Ruairi Seosamh O'Meadhra, Kingsport, Tenn. (US) | ||
| Assigned to Eastman Chemical Company, Kingsport, Tenn. (US) | ||
| Filed on Jul. 28, 2005, as Appl. No. 11/191,766. | ||
| Claims priority of provisional application 60/606735, filed on Sep. 02, 2004. | ||
| Claims priority of provisional application 60/606807, filed on Sep. 02, 2004. | ||
| Prior Publication US 2006/0047166 A1, Mar. 02, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C07C 51/42 (2006.01) | ||
| U.S. Cl. 562—485 | 35 Claims |
| 1. A process comprising:
(a) oxidizing one or more reactants in a primary oxidation reactor to thereby produce a solid/liquid mixture comprising crude
terephthalic acid (CTA) particles; and
(b) simultaneously subjecting at least a portion of said solid/liquid mixture to oxidative digestion and concentration in
a zoned slurry concentrator, said zoned slurry concentrator comprising a single vessel having an agitated zone and a settling
zone, wherein the vessel defines a liquid outlet for removing a liquid-concentrated mixture and a solids outlet for removing
a solids-concentrated mixture, thereby producing a solids-concentrated mixture containing oxidation-treated terephthalic acid
(TPA) particles.
|