US2967187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of anthraquinone
Assignee: Standard Oil Co
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Filing: 1958-12-31
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Granted: 1961-01-03
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Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl Serres
- 👤 Ellis K Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:39
CPC Classifications
C; C07; C07C; C07C66/00; C07C66/02; C07C46/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ANTHRAQUINONE, CARBOXY-ANTHRAQUINONES AND CHLORO-ANTHRAQUINONES WHICH COMPRISES REACTING BENZOIC ACID WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL BENZENES AND NUCLEAR CHLORINATED ALKYLBENZENES HAVING AT LEAST ONE METHYL SUBSTITUENT IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID AND POLYPHOSPHORIC ACID AT A TEMPERATURE BETWEEN ABOUT 150* C. AND ABOUT 250* C. TO PRODUCE A SUBSTITUTED BENZOPHENONE HAVING A METHYL SUBSTITUENT ON THE CARBON ADJACENT TO THE RING CARBON ATTACHED TO THE KETONE GROUP, OXIDIZING SAID SUBSTITUTED BENZOPHENONE WITH MOLECULAR OXYGEN IN THE LIQUID PHASE IN A LOWER ALIPHATIC MONOCARBOXYLIC ACID SOLVENT AND IN THE PRESENCE OF A CATALYST COMPRISING IN CONJOINT PRESENCE BROMINE AND A HEAVY METAL OXIDATION CATALYST TO CONVERT SAID METHYL SUBSTITUENT TO A CARBOXYLIC ACID GROUP, EFFECTING INTRAMOLECULAR RING CLOSURE OF SAID OXIDIZED BENZOPHENONE BY CONTACTING WITH AN ACIDIC REAGENT AND SEPARATING SAID COMPOUND AS A REACTION PRODUCT.
Claim 2
Dependent Claim
162 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ANTHRAQUINONE, CARBOXY-ANTHRAQUINONES AND CHLORO-ANTHRAQUINONES WHICH COMPRISES REACTING BENZOIC ACID WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL BENZENES AND NUCLEAR CHLORINATED ALKYLBENZENES HAVING AT LEAST ONE METHYL SUBSTITUENT IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID AND POLYPHOSPHORIC ACID AT A TEMPERATURE BETWEEN ABOUT 150* C. AND ABOUT 250* C. TO PRODUCE A SUBSTITUTED BENZOPHENONE HAVING A METHYL SUBSTITUENT ON THE CARBON ADJACENT TO THE RING CARBON ATTACHED TO THE KETONE GROUP, OXIDIZING SAID SUBSTITUTED BENZOPHENONE WITH MOLECULAR OXYGEN IN THE LIQUID PHASE IN A LOWER ALIPHATIC MONOCARBOXYLIC ACID SOLVENT AND IN THE PRESENCE OF A CATALYST COMPRISING IN CONJOINT PRESENCE BROMINE AND A HEAVY METAL OXIDATION CATALYST TO CONVERT SAID METHYL SUBSTITUENT TO A CARBOXYLIC ACID GROUP, EFFECTING INTRAMOLECULAR RING CLOSURE OF SAID OXIDIZED BENZOPHENONE BY CONTACTING WITH AN ACIDIC REAGENT AND SEPARATING SAID COMPOUND AS A REACTION PRODUCT.
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) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |