US2988573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing phenol
Assignee: Union Carbide Corp
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Filing: 1958-10-06
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Granted: 1961-06-13
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Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 Frank H Siebentritt
- 👤 Paul E Gamble
- 👤 Warren B Imbriani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/74; C07C37/78; C07C37/01; C07C37/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING PHENOL WHICH INCLUDES THE STEPS OF REACTING IN THE VAPOR STATE IN THE PRESENCE OF A HYDROLYSIS PROMOTING CATALYST MONOCHLOROBENZENE WITH STEAM TO PRODUCE A MIXTURE COMPRISING PHENOL, HYDROGEN CHLORIDE, WATER, AND SAID MONOHALOGENATED BENZENE, ADDING BENZENE TO SAID MIXTURE IN AN AMOUNT SUFFICIENT TO FORM AN AZEOTROPE CONSISTING OF BENZENE, HYDROGEN CHLORIDE, AND SUBSTANTIALLY ALL OF THE WATER PRESENT, REMOVING SAID AZEOTROPE FROM SAID PHENOL AND SAID MONOHALOGENATED BENZENE BY FRACTIONATION, AND SEPARATING SAID PHENOL FROM SAID MONOCHLOROBENZENE BY DISTILLATION.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING PHENOL WHICH INCLUDES THE STEPS OF REACTING IN THE VAPOR STATE IN THE PRESENCE OF A HYDROLYSIS PROMOTING CATALYST MONOCHLOROBENZENE WITH STEAM TO PRODUCE A MIXTURE COMPRISING PHENOL, HYDROGEN CHLORIDE, WATER, AND SAID MONOHALOGENATED BENZENE, ADDING BENZENE TO SAID MIXTURE IN AN AMOUNT SUFFICIENT TO FORM AN AZEOTROPE CONSISTING OF BENZENE, HYDROGEN CHLORIDE, AND SUBSTANTIALLY ALL OF THE WATER PRESENT, REMOVING SAID AZEOTROPE FROM SAID PHENOL AND SAID MONOHALOGENATED BENZENE BY FRACTIONATION, AND SEPARATING SAID PHENOL FROM SAID MONOCHLOROBENZENE BY DISTILLATION.
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |