US4042630A
Expired / Lapsed
US
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Process for the preparation of cycloalkanones and cycloalkanols
Assignee: Stamicarbon BV
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Filing: 1976-06-01
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Granted: 1977-08-16
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Expires: 1996-06-01
Abstract
Abstract An improved process for preparing cycloalkanones and cycloalkanols from cycloalkylhydroperoxides. Cycloalkylhydroperoxides are converted under the influence of a solid heterogeneous chromium oxide catalyst and the reaction mixture is stripped with a stripping gas which reduces the content of water which is formed in the reaction mixture during conversion. As a result, the catalyst activity and selectivity is maintained.
Inventors
- 👤 Jan Wolters
- 👤 Jan L. J. P. Hennekens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:07
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/53
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
In a process for preparing cycloalkanones and cycloalkanols by conversion of cycloalkylhydroperoxides in a liquid hydrocarbon vehicle under the influence of a solid heterogeneous chromium oxide catalyst, the improvement which comprises stripping the reaction mixture of said cycloalkylhydroperoxides with a stripping gas during said conversion so as to maintain the water content of the reaction mixture at or below the saturation concentration.
Claim 2
Dependent Claim
62 words
In a process for preparing cycloalkanones and cycloalkanols by conversion of cycloalkylhydroperoxides in a liquid hydrocarbon vehicle under the influence of a solid heterogeneous chromium oxide catalyst, the improvement which comprises stripping the reaction mixture of said cycloalkylhydroperoxides with a stripping gas during said conversion so as to maintain the water content of the reaction mixture at or below the saturation concentration.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein said conversion is carried out a temperature below 150° C.
Claim 4
Dependent Claim
16 words
A process according to claim 2 wherein the temperature is between about 60° and 100° C.
Claim 5
Dependent Claim
27 words
A process according to claim 1 wherein said stripping gas is selected from the group consisting of nitrogen, argon, hydrocarbon vehicle vapor, carbon dioxide and mixtures thereof.
Claim 6
Dependent Claim
20 words
A process according to claim 1 wherein the stripping gas is composed of air diluted with nitrogen or carbon dioxide.
Claim 7
Dependent Claim
103 words
In a process for preparing cycloalkanones and cycloalkanols by conversion of cycloalkylhydroperoxides under the influence of a solid heterogeneous catalyst comprising converting a cycloalkylhydroperoxide having 5-12 carbon atoms in the ring by heating said cycloalkylhydroperoxide at a temperature of from about 30° C. to about 150° C. in the presence of a chromium oxide catalyst wherein the valency of the chromium is from 3 to 6, the improvement which comprises stripping the reaction mixture of said cycloalkylhydroperoxide with a stripping gas during conversion whereby the concentration in the reaction mixture of water formed during conversion is maintained at or below the saturation concentration.
Claim 8
Dependent Claim
103 words
In a process for preparing cycloalkanones and cycloalkanols by conversion of cycloalkylhydroperoxides under the influence of a solid heterogeneous catalyst comprising converting a cycloalkylhydroperoxide having 5-12 carbon atoms in the ring by heating said cycloalkylhydroperoxide at a temperature of from about 30° C. to about 150° C. in the presence of a chromium oxide catalyst wherein the valency of the chromium is from 3 to 6, the improvement which comprises stripping the reaction mixture of said cycloalkylhydroperoxide with a stripping gas during conversion whereby the concentration in the reaction mixture of water formed during conversion is maintained at or below the saturation concentration.
Claim 9
Dependent Claim
27 words
A process according to claim 6 wherein said stripping gas is selected from the group consisting of nitrogen, argon, hydrocarbon vehicle vapor, carbon dioxide and mixtures thereof.
Claim 10
Dependent Claim
16 words
A process according to claim 7 wherein the temperature is between about 60° and 100° C.
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |