Toluic acid
Abstract
Abstract Process for oxidatively carbonylating toluene to toluic acid, at least 50 mol % of the toluic acid being the p-isomer, said process comprising contacting and reacting, at 110°-250° C., at a pressure of at least 500 psi (3.45 MPa), toluene, carbon monoxide, oxygen and the catalyst ingredients consisting essentially of (a) a compound of rhodium, iridium, ruthenium, platinum, palladium or osmium; (b) a sulfur oxy-acid or a Group Ia or IIa metal salt of a sulfur oxy-acid; and (c) an acid or acid mixture having a Hammett acidity value (--H o ) of greater than 7.0, said catalyst ingredients containing 0.5-30 mol % of (a) and 70-99.5 mol % of (b+c), with the molar ratios of (b/a) and (c/a) each being at least 2, and recovering toluic acid.
Inventors
- 👤 Francis J. Waller
Bibliographic Details
Claims Analysis
Total Claims: 6References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |