US3088974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic reaction process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1958-11-14
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Granted: 1963-05-07
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Expires: 1978-11-14
Abstract
No abstract record available.
Inventors
- 👤 Harry E Cier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:27
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR OXIDIZING XYLENES TO OBTAIN REACTION PRODUCTS WITH A HIGH PERCENTAGE OF TOLUIC ACIDS COMPRISING THE STEPS OF: AT ELEVATED PRESSURE AND ELEVATED TEMPERATURE, REACTING IN A REACTION VESSEL A PORTION OF THE XYLENES WITH AN OXIDIZING AGENT TO PRODUCE AN EFFLUENT CONTAINING FROM 85% TO 55% BY WEIGHT UNREACTED XYLENES AND REACTION PRODUCTS; AND FLOWING THE UNREACTED XYLENES AND REACTION PRODUCTS TO A CONFINED SPACE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE AND IN THERMAL CONTACT WITH THE REACTION VESSEL, THE TEMPERATURE IN THE REACTION VESSEL BEING HIGH ENOUGH TO PROVIDE A TEMPERATURE IN SAID CONFINED SPACE ABOVE THE BOILING POINT OF THE UNREACTED XYLENES AND BELOW THE BOILING POINTS OF THE OXIDATION PRODUCTS WHEREBY THE UNREACTED XYLENES ARE VAPORIZED BY THE HEAT GENERATED BY THE REACTION, CONDENSING THE VAPORIZED XYLENES AND RECYLING THE CONDENSED XYLENES TO THE REACTION VESSEL; AND REMOVING THE XYLENE-FREE REACTION PRODUCTS.
Claim 2
Dependent Claim
146 words
A PROCESS FOR OXIDIZING XYLENES TO OBTAIN REACTION PRODUCTS WITH A HIGH PERCENTAGE OF TOLUIC ACIDS COMPRISING THE STEPS OF: AT ELEVATED PRESSURE AND ELEVATED TEMPERATURE, REACTING IN A REACTION VESSEL A PORTION OF THE XYLENES WITH AN OXIDIZING AGENT TO PRODUCE AN EFFLUENT CONTAINING FROM 85% TO 55% BY WEIGHT UNREACTED XYLENES AND REACTION PRODUCTS; AND FLOWING THE UNREACTED XYLENES AND REACTION PRODUCTS TO A CONFINED SPACE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE AND IN THERMAL CONTACT WITH THE REACTION VESSEL, THE TEMPERATURE IN THE REACTION VESSEL BEING HIGH ENOUGH TO PROVIDE A TEMPERATURE IN SAID CONFINED SPACE ABOVE THE BOILING POINT OF THE UNREACTED XYLENES AND BELOW THE BOILING POINTS OF THE OXIDATION PRODUCTS WHEREBY THE UNREACTED XYLENES ARE VAPORIZED BY THE HEAT GENERATED BY THE REACTION, CONDENSING THE VAPORIZED XYLENES AND RECYLING THE CONDENSED XYLENES TO THE REACTION VESSEL; AND REMOVING THE XYLENE-FREE REACTION PRODUCTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |