Patent US3006977A successfully refreshed from Google Patents.
US3006977A
Expired / Lapsed
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Disproportionation of toluene
Assignee: Standard Oil Co
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Filing: 1960-08-22
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Granted: 1961-10-31
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:10
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR THE DISPROPORTIONATION OF TOLUENE TO PRODUCE A POLYMETHYL BENZENE SELECTED FROM THE CLASS CONSISTING OF XYLENE AND MESITYLENE WHICH PROCESS COMPRISES CONTACTING TOLUENE, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 80*C. TO ABOUT 125*C. AT A PRESSURE SUFFICIENT TO MAINTAIN HF IN THE LIQUID STATE, WITH AT LEAST ABOUT 0.3 PART BY WEIGHT OF BF3 AND AT LEAST ABOUT 0.2 PART BY WEIGHT OF LIQUID HF PER PART BE WEIGHT OF TOLUENE DESIRED TO BE CONVERTED FOR A PERIOD OF TIME SUFFICIENT TO DISPROPORTIONATE TOLUENE INTO SAID POLYMETHYL BENZENE, AND SEPARATING SAID POLYMETHYL BENZENE AS A DISPROPORTIONATION PRODUCT.
Claim 2
Dependent Claim
103 words
A PROCESS FOR THE DISPROPORTIONATION OF TOLUENE TO PRODUCE A POLYMETHYL BENZENE SELECTED FROM THE CLASS CONSISTING OF XYLENE AND MESITYLENE WHICH PROCESS COMPRISES CONTACTING TOLUENE, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 80*C. TO ABOUT 125*C. AT A PRESSURE SUFFICIENT TO MAINTAIN HF IN THE LIQUID STATE, WITH AT LEAST ABOUT 0.3 PART BY WEIGHT OF BF3 AND AT LEAST ABOUT 0.2 PART BY WEIGHT OF LIQUID HF PER PART BE WEIGHT OF TOLUENE DESIRED TO BE CONVERTED FOR A PERIOD OF TIME SUFFICIENT TO DISPROPORTIONATE TOLUENE INTO SAID POLYMETHYL BENZENE, AND SEPARATING SAID POLYMETHYL BENZENE AS A DISPROPORTIONATION PRODUCT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |