US3928477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phenols from decomposition of aromatic hydroperoxides
Assignee: Burmah Oil Trading Ltd
•
Filing: 1973-11-08
•
Granted: 1975-12-23
•
Expires: 1993-11-08
Abstract
Abstract WHEREIN M is a metal atom having a co-ordination number of at least 2 and recovering the phenols from the decomposition products. Phenols are prepared by decomposing aromatic organic hydroperoxides in the presence of a metal complex containing the grouping
Inventors
- 👤 Peter Graham Spencer Field
- 👤 David Anthony Lock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:56
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2204; B01J31/226; C; C07; C07C; C07C37/00; C07C37/08; B01J2531/00; B01J2531/50; B01J2531/60; B01J2531/70; B01J2531/80; B01J2531/82; B01J2531/824; B01J2531/84; B01J2531/847; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
58 words
A PROCESS FOR PRODUCING A PHENOL OR A SUBSTITUTED PHENOL BY DECOMPOSING AN AROMATIC HYDROPEROXIDE,WHICH PROCESS COMPRISES EFFECTING THE DECOMPOSITION AT A TEMPEATURE IN THE RANGE FROM AMBIENT TEMPERATURE TO 180*C. IN THE PRESENCEOF FROM 0.00001 TO 0.5 MOLE PERCENT, BASED ON THE AMOUNT OF THE HYDROPEROXIDE OF A CATALYST COMPRISNG A METAL COMPLEX REPRESENTED BY THE FROMULA:
Claim 2
Dependent Claim
58 words
A PROCESS FOR PRODUCING A PHENOL OR A SUBSTITUTED PHENOL BY DECOMPOSING AN AROMATIC HYDROPEROXIDE,WHICH PROCESS COMPRISES EFFECTING THE DECOMPOSITION AT A TEMPEATURE IN THE RANGE FROM AMBIENT TEMPERATURE TO 180*C. IN THE PRESENCEOF FROM 0.00001 TO 0.5 MOLE PERCENT, BASED ON THE AMOUNT OF THE HYDROPEROXIDE OF A CATALYST COMPRISNG A METAL COMPLEX REPRESENTED BY THE FROMULA:
Claim 3
Dependent Claim
14 words
A process according to claim 1 in which the hydroperoxide is a secondary hydroperoxide.
Claim 4
Dependent Claim
15 words
A process according to claim 2 in which the hydroperoxide is a secondary aralkyl hydroperoxide.
Claim 5
Dependent Claim
13 words
A process according to claim 3 in which the hydroperoxide is ethylbenzene hydroperoxide.
Claim 6
Dependent Claim
13 words
A process according to claim 1 in which the hydroperoxide is cumene hydroperoxide.
Claim 7
Dependent Claim
30 words
A process according to claim 1 in which the metal is selected from the group consisting of transition metals of group 5, 6, 7 and 8 of the Periodic Table.
Claim 8
Dependent Claim
22 words
A process according to claim 1, in which the metal is selected from the group consisting of nickel, palladium, iron and cobalt.
Claim 9
Dependent Claim
11 words
A process according to claim 1 in which n is 2.
Claim 10
Dependent Claim
15 words
A process according to claim 1 in which R1 and R2 are each aryl groups.
Claim 11
Dependent Claim
15 words
A process according to claim 9 in which R1 and R2 are each phenyl groups.
Claim 12
Dependent Claim
18 words
A process according to claim 1 in which the metal complex is bis-dithiobenzil nickel represented by the formula:
Claim 13
Dependent Claim
18 words
A process according to claim 1 in which the metal complex is bis-dithiobenzil palladium represented by the formula:
Claim 14
Dependent Claim
17 words
A process according to claim 1 in which the decomposition is moderated by the presence of water.
Claim 15
Dependent Claim
31 words
A process according to claim 1 in which the decomposition is carried out in the presence of from 0.01 to 2.0 wt. % of water based on the amount of hydroperoxide.
Claim 16
Dependent Claim
31 words
A process according to claim 14 in which the decomposition is carried out in the presence of from 0.05 to 0.5 wt. % of water based on the amount of hydroperoxide.
Claim 17
Dependent Claim
22 words
A process according to claim 1 in which the decomposition is effected at a temperature in the range from 80*C to 120*C.
Claim 18
Dependent Claim
35 words
A process according to claim 1 in which the decomposition is carried out with the organic hydroperoxide in solution in an organic solvent which is inert to the organic hydroperoxide and to the decomposition products.
Claim 19
Dependent Claim
21 words
A process according to claim 17 in which the solution contains from 8 to 30 wt. % of the organic hydroperoxide.
Claim 20
Dependent Claim
19 words
A process according to claim 17 in which the solveNt is benzene, toluene, xylene, ethylbenzene, chlorobenzene, nitrobenzene or dimethylformamide.
Claim 21
Dependent Claim
58 words
A process in accordance with claim 1, wherein R1 and R2, which may be the same or different, represent aryl, alkaryl with alkyl substituents of C1 6 or alkyl or cycloalkyl with C1 8 which may be unsubstituted, substituted by one or more halogen atoms, alkoxy groups containing up to 6 carbon atoms or atoms providing a grouping:
Claim 22
Dependent Claim
17 words
A process in accordance with claim 20, wherein said aryl or alkaryl group comprises phenyl of alkylphenyl.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |