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Patent US4046813A successfully refreshed from Google Patents.
US4046813A
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Process for producing ketoisophorone
Assignee: Hoffmann La Roche Inc
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Filing: 1975-03-28
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Granted: 1977-09-06
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Expires: 1995-03-28
Abstract
Abstract Process for producing ketoisophorone from β-isophorone by oxidation utilizing a metal salt catalyst and an organic nitrogen base.
Inventors
- 👤 Wolf Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:16
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
48 words
A process for oxidizing β-isophorone to ketoisophorone comprising oxidizing, in the presence of an organic aromatic nitrogen base, β-isophorone with oxygen or an oxygen containing gas utilizing as a catalyst a salt of a metal selected from the group consisting of lead, vanadium, chromium, manganese, iron or cobalt.
Claim 2
Dependent Claim
48 words
A process for oxidizing β-isophorone to ketoisophorone comprising oxidizing, in the presence of an organic aromatic nitrogen base, β-isophorone with oxygen or an oxygen containing gas utilizing as a catalyst a salt of a metal selected from the group consisting of lead, vanadium, chromium, manganese, iron or cobalt.
Claim 3
Dependent Claim
13 words
The process of claim 1, wherein said metal is vanadium, manganese or iron.
Claim 4
Dependent Claim
10 words
The process of claim 1, wherein said base is pyridine.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein the salt is an enol salt of vanadium, chromium, manganese, iron or cobalt.
Claim 6
Dependent Claim
21 words
The process or claim 4, wherein the enol salt is vanadium acetylacetonate, chromium acetylacetonate, manganese acetylacetonate, iron acetylacetonate or cobalt acetylacetonate.
Claim 7
Dependent Claim
19 words
The process of claim 1, wherein the oxidation is carried out in the presence of an inert organic solvent.
Claim 8
Dependent Claim
10 words
The process of claim 6, wherein the solvent is pyridine.
Claim 9
Dependent Claim
22 words
The process of claim 1, wherein the oxidation is carried out at a temperature of from about 20° to about 100° 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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |