US2856437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resorcinol production
Assignee: Heyden Newport Chemical Corp
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Filing: 1952-12-05
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Granted: 1958-10-14
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Expires: 1972-12-05
Abstract
No abstract record available.
Inventors
- 👤 William R Cake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:06
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/04; C07C37/055; C07C37/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN THE PROCESS FOR PRODUCING RESORCINOL FROM BENZENE, THE STEPS COMPRISING DISULFONATING BENZENE WITH A SULFONATING SOLUTION CONSISTING BY WEIGHT OF FROM 75% TO 80% OF THE SULFONATING AGENT STABILIZED GAMMA SULFUR TRIOXIDE DISSOLVED IN SULFURIC ACID, THEREBY PRODUCING A REACTION MIXTURE CONTAINING BENZENE META DISULFONIC ACID AND SULFURIC ACID, ADDING ALKALI METAL HYDROXIDE TO THE REACTION MIXTURE AND NEUTRALIZING AND FUSING THE BENZENE META DISULFONIC ACID WITHOUT PRECIPITATING INSOLUBLE SALTS OUT OF THE REACTION MIXTURE, THEREBY PRODUCING ALKALI METAL RESOCINATE, AND THEREAFTER TREATING THE ALKALI METAL RESOCINATE WITH AN INORGANIC ACID TO PRODUCE RESOCINOL.
Claim 2
Dependent Claim
95 words
IN THE PROCESS FOR PRODUCING RESORCINOL FROM BENZENE, THE STEPS COMPRISING DISULFONATING BENZENE WITH A SULFONATING SOLUTION CONSISTING BY WEIGHT OF FROM 75% TO 80% OF THE SULFONATING AGENT STABILIZED GAMMA SULFUR TRIOXIDE DISSOLVED IN SULFURIC ACID, THEREBY PRODUCING A REACTION MIXTURE CONTAINING BENZENE META DISULFONIC ACID AND SULFURIC ACID, ADDING ALKALI METAL HYDROXIDE TO THE REACTION MIXTURE AND NEUTRALIZING AND FUSING THE BENZENE META DISULFONIC ACID WITHOUT PRECIPITATING INSOLUBLE SALTS OUT OF THE REACTION MIXTURE, THEREBY PRODUCING ALKALI METAL RESOCINATE, AND THEREAFTER TREATING THE ALKALI METAL RESOCINATE WITH AN INORGANIC ACID TO PRODUCE RESOCINOL.
References Cited (Backward Citations)
US1308757A
Cited
US1915925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |