Claims
- 1. An installation suitable for the production of moncarboxylic and polycarboxylic araomatic acids by cataytic oxidation of the corresponding aromatic precursors in the presence of gaseous oxygen in the presence of a catalytic complex consisting of a mixture of cobalt and zirconium salts or cerium and zirconium salts, in a reaction solvent constituted by C1-C6 aliphatic acids or mixtures thereof, which installation comprises an oxidation reactor and a filter arranged downstream of the oxidation reactor, in which: (a) both the oxidation reactor and the filter operate under the same pressure and temperature conditions; (b) more than 50% of the mother liquors resulting from the filtration stage are recycled into the oxidation reactor substantially at the same pressure and temperature conditions of the oxidation and filtration stages; and (c) at least some of the discharge gases coming from the oxidation reactor are supplied to the pressure filter.
- 2. An installation according to claim 1, characterized in that C1-C6 aliphatic acid is acetic acid.
- 3. An installation according to claim 2, characterized in that the acetic acid has a water content lower than 4% by weight.
Priority Claims (1)
Number |
Date |
Country |
Kind |
MI98A000606 |
Mar 1999 |
IT |
|
PRIORITY
[0001] This application claims priority from and is a divisional of co-pending U.S. Ser. No. 09/913,080 dated Aug. 08, 2001, a 371 of International Application PCT/E P00/02755 filed Mar. 24, 2000. This divisional application is the result of a restriction requirement and incorporates Ser. No. 09/913,080 by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09913080 |
Aug 2001 |
US |
Child |
10162777 |
Jun 2002 |
US |