US4490566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phenol
Assignee: Mobil Oil AS
•
Filing: 1983-05-06
•
Granted: 1984-12-25
•
Expires: 2003-05-06
Abstract
Abstract Phenol and acetone are produced by the cleavage of cumene hydroperoxide in the presence of a solid heterogeneous catalyst with acidic activity comprising an intermediate pore size zeolite such as ZSM-5.
Inventors
- 👤 Clarence D. Chang
- 👤 Bruce P. Pelrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:56
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08; C07C45/00; C07C45/51; C07C45/53; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
37 words
A process for the production of phenol and acetone which comprises contacting cumene hydroperoxide with a catalyst comprising a crystalline zeolite having a Constraint Index of 1 to 12 and a silica:alumina ratio of at least 12:1.
Claim 2
Dependent Claim
37 words
A process for the production of phenol and acetone which comprises contacting cumene hydroperoxide with a catalyst comprising a crystalline zeolite having a Constraint Index of 1 to 12 and a silica:alumina ratio of at least 12:1.
Claim 3
Dependent Claim
18 words
A process according to claim 1 in which the zeolite is at least partly in the hydrogen form.
Claim 4
Dependent Claim
17 words
A process according to claim 1 in which the zeolite is ZSM-5, ZSM-11, ZSM-23, ZSM-35 or ZSM-38.
Claim 5
Dependent Claim
12 words
A process according to claim 1 in which the zeolite is ZSM-5.
Claim 6
Dependent Claim
18 words
A process according to claim 4 in which the zeolite has a silica:alumina ratio of at least 70:1.
Claim 7
Dependent Claim
25 words
A process according to claim 1 in which the cumene hydroperoxide is contacted with the zeolite at a temperature of 80° C. to 200° C.
Claim 8
Dependent Claim
25 words
A process according to claim 1 in which the cumene hydroperoxide is contacted with the zeolite at a temperature of 80° C. to 120° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |