US3960966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ketoisophorone manufacture
Assignee: Hoffmann La Roche Inc
•
Filing: 1975-06-19
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Granted: 1976-06-01
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Expires: 1995-06-19
Abstract
Abstract A process for the manufacture of ketoisophorone by the oxidation of α-isophorone employing oxygen gas in the presence of a catalyst.
Inventors
- 👤 Erich Widmer
- 👤 Marcel Seuret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:31
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/26; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/885; B01J27/00; B01J27/14; B01J27/186; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J31/2234; B01J31/28; B01J31/34; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/50; B01J2531/56; B01J2531/60; B01J2531/64
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A process for the preparation of ketoisophorone which process comprises oxidizing α-isophorone with an oxygen-containing gas in the presence of from about 0.1 to about 10 wt. percent based on the weight of said α-isophorone, of a catalyst selected from the group consisting of phosphomolybdic acid of or salt thereof, silicomolybdic acid or a salt thereof, molybdenum VI dioxybisacetylacetonate, vanadium IV dichlorobisacetylacetonate or vanadium V oxy-dichloromonoacetylacetonate, said oxidation being carried out in the presence or absence of solvent at a temperature of from about 50°C. to 150°C.
Claim 2
Dependent Claim
87 words
A process for the preparation of ketoisophorone which process comprises oxidizing α-isophorone with an oxygen-containing gas in the presence of from about 0.1 to about 10 wt. percent based on the weight of said α-isophorone, of a catalyst selected from the group consisting of phosphomolybdic acid of or salt thereof, silicomolybdic acid or a salt thereof, molybdenum VI dioxybisacetylacetonate, vanadium IV dichlorobisacetylacetonate or vanadium V oxy-dichloromonoacetylacetonate, said oxidation being carried out in the presence or absence of solvent at a temperature of from about 50°C. to 150°C.
Claim 3
Dependent Claim
57 words
A process according to claim 1 wherein a catalyst additive selected from the group consisting of copper (II) salt, cer-(III)-acetylacetonate, molybdenum trioxide, palladium, an alkali metal dichromate and tungstic acid is employed, said additive being present in an amount of from about 2 wt. percent to about 50 wt. percent based on the total amount of catalyst.
Claim 4
Dependent Claim
31 words
A process according to claim 2 wherein said catalyst additive is present in an amount of from about 2 wt.% to about 20 wt.% based on the total amount of catalyst.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein air is used as the oxygen-containing gas.
Claim 6
Dependent Claim
18 words
A process according to claim 1 wherein the oxidation is carried out in the absence of a solvent.
Claim 7
Dependent Claim
19 words
A process according to claim 1 wherein the oxidation is carried out in the presence of an inert solvent.
Claim 8
Dependent Claim
17 words
A process according to claim 6 wherein said inert solvent is a halogenated or alkylated aromatic solvent.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein the oxidation is carried out at a temperature of about 80°-100°C.
Claim 10
Dependent Claim
23 words
A process according to claim 1 wherein the catalyst is used in an amount of about 0.5-4 wt.% based on the α-isophorone used.
Claim 11
Dependent Claim
23 words
A process according to claim 9 wherein the catalyst is used in an amount of about 2 wt.% based on the α-isophorone used.
References Cited (Backward Citations)
DE2356546A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |