Apparatus for stripping solvent from and dehydrating trimellitic acid content of fluid effluent from catalytic liquid phase oxidation of pseudocumene in presence of acetic acid
Abstract
Abstract CARRYOVER OF TRIMELLITIC ACID OR ITS INTRAMOLECULAR ACID ANHYDRIDE WITH STRIPPED SOLVENT AND REFLUX OR STRIPPED SOLVENT TO DEHYDRATION OF TRIMELLITIC ACID ARE AVOIDED BY CONDUCT OF SAID STIPPING AND DEHYDRATING IN A COMBINATION OF (A) SOLVENT STRIPPING TOWER COMPRISING A BOTTOM REFLUX TRAP OUT ZONE, A SOLVENT VAPORIZING ZONE, A SOLVENT SCRUBBING ZONE, A SOLVENT STRIPPING ZONE AND A DEPHLEGMATING ZONE AND (B) A DEHYDRATION DRUM WITH HOT REFLUX (KNOCK-BACK) CONDENSER AND REBOILER ARRANGED TO PROVIDE SOLVENT VAPORS FROM DEHYDRATION DRUM TO SAID SCRUBBING ZONE OF SAID TOWER AND ONE PORTION OF LIQUID BOTTOMS REFLUX FROM SAID TRAP OUT ZONE TO DEHYDRATION DRUM AND A SECOND PORTION OF SAID LIQUID BOTTOMS REFLUX TO SOLVENT VAPORIZING ZONE.
Inventors
- 👤 D Micklewright
Bibliographic Details
Claims Analysis
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| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |