Patent US3293308A successfully refreshed from Google Patents.
US3293308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mode of resin treatment remaining as waste at the production of phenol by the cumene method
Assignee: Individual
•
Filing: 1961-06-19
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Granted: 1966-12-20
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Vol-Epstein Alexand Borisovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:59
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/86; C07C37/50; C07C37/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN THE PROCESS FOR THE MANUFACTURE OF PHENOL BY THE CUMENE METHOD WHEREBY THERE IS FORMED A DECOMPOSITION REACTION MIXTURE COMPRISING PHENOL, ACETONE, ALPHA-METHYLSTYRENE, ACETOPHENONE, DIMETHYLPHENYL CARBINOL, DIMERIC ALPHA-METHYLSTYRENE, 2-PHENYL-2-HYDROXYPHENYL-PROPANE, SODIUM PHENOLATE, AND SODIUM SULFATE, AND WHEREIN THE PHENOL AND ACETONE ARE SUBSTANTIALLY SEPARATED FROM SAID DECOMPOSITION REACTION MIXTURE TO LEAVE A RESIDUE CONTAINING SAID ALPHA-METHYL STYRENE, ACETOPHENONE, DIMETHYLPHENYL CARBINOL, DIMERIC ALPHA-METHYLSTYRENE, PARA-ALPHA-CUMYL PHENOL, SODIUM PHENOLATE AND SODIUM SULPHATE, THE IMPROVEMENT WHICH COMPRISES REMOVING THE SODIUM SALTS FROM SAID RESIDUE, THEN CATALYTICALLY HYDROGENATING SAID SODIUM-FREE RESIDUE TO FORM ADDITIONAL QUANTITIES OF PHENOL, ETHYLBENZENE AND CUMENE, AND THEREAFTER FRACTIONALLY DISTILLING SAID HYDROGENATED SODIUM-FREE RESIDUE TO SEPARATE THE ETHYLBENZENE FRACTION, THE PHENOL FRACTION, AND THE CUMENE FRACTION.
Claim 2
Dependent Claim
115 words
IN THE PROCESS FOR THE MANUFACTURE OF PHENOL BY THE CUMENE METHOD WHEREBY THERE IS FORMED A DECOMPOSITION REACTION MIXTURE COMPRISING PHENOL, ACETONE, ALPHA-METHYLSTYRENE, ACETOPHENONE, DIMETHYLPHENYL CARBINOL, DIMERIC ALPHA-METHYLSTYRENE, 2-PHENYL-2-HYDROXYPHENYL-PROPANE, SODIUM PHENOLATE, AND SODIUM SULFATE, AND WHEREIN THE PHENOL AND ACETONE ARE SUBSTANTIALLY SEPARATED FROM SAID DECOMPOSITION REACTION MIXTURE TO LEAVE A RESIDUE CONTAINING SAID ALPHA-METHYL STYRENE, ACETOPHENONE, DIMETHYLPHENYL CARBINOL, DIMERIC ALPHA-METHYLSTYRENE, PARA-ALPHA-CUMYL PHENOL, SODIUM PHENOLATE AND SODIUM SULPHATE, THE IMPROVEMENT WHICH COMPRISES REMOVING THE SODIUM SALTS FROM SAID RESIDUE, THEN CATALYTICALLY HYDROGENATING SAID SODIUM-FREE RESIDUE TO FORM ADDITIONAL QUANTITIES OF PHENOL, ETHYLBENZENE AND CUMENE, AND THEREAFTER FRACTIONALLY DISTILLING SAID HYDROGENATED SODIUM-FREE RESIDUE TO SEPARATE THE ETHYLBENZENE FRACTION, THE PHENOL FRACTION, AND THE CUMENE FRACTION.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |