US2560666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 4-tertiary-butyl-3-methylphenol
Assignee: Gulf Research and Development Co
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Filing: 1948-04-16
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Granted: 1951-07-17
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Expires: 1968-04-16
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 Robert S Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/50; C07C37/68; C07C37/70; C07C37/72
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A PROCESS FOR PRODUCING 4-TERTIARY-BUTY-3METHYLPHENOL WHICH CONSISTS OF MIXING METACRESOL WITH ABOUT 0.001 TO ABOUT 0.1 PER CENT BY WEIGHT OF CONCENTRATED SULFURIC ACID, INTRODUCING ISOBUTYLENE INTO THE METACRESOL-SULFURIC ACID MIXTURE AT AN ALKYLATING TEMPERATURE BETWEEN ABOUT 0* AND ABOUT 40* C. UNTIL THE MOLECULAR RATIO OF ISOBUTYLENE TO METACRESOL IN THE RESULTING REACTION MASS IS BETWEEN ABOUT 0.4:1 AND 1.5:1, CONTACTION SAID REACTION MASS WITH AN AQUEOUS SOLUTION OF CAUSTIC SODA OF NOT OVER 15 PER CENT STRENGTH, RECOVERING AN EXTRACT PORTION AND A FARRINATE PORTION, ACIDIFYING THE EXTRACT PORTION WHEREUPON AN OIL LAYER AND AN AQUEOUS LAYER ARE FORMED, SEPARATING THE OIL LAYER FROM THE AQUEOUS LAYER, NEUTRALIZING THE OIL LAYER, AND FRACTIONATING THE NEUTRALIZED OIL LAYER TO SEPARATELY RECOVER METACRESOL AND 4-TERTIARY-BUTYL-3-METHYLPHENOL.
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) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |