Patent US5369040A successfully refreshed from Google Patents.
US4045477A
Expired / Lapsed
US
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Acetoxylation process
Assignee: Chem Systems Inc
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Filing: 1975-07-17
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Granted: 1977-08-30
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Expires: 1995-07-17
Abstract
Abstract Vicinal hydroxyesters and diesters are prepared by the oxidation of olefins with molecular oxygen in a carboxylic acid at a temperature of over 150° C. in the presence of a catalyst combination containing tellurium and an iodide source.
Inventors
- 👤 Martin B. Sherwin
- 👤 I-Der Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:53
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055; C07C69/00; C07C69/66; C07C69/67
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
A process for preparing vicinal hydroxycarboxylates and vicinal dicarboxylates which comprises contacting an olefin with molecular oxygen in the liquid phase in the presence of a carboxylic acid at a temperature of at least 160° C. in a reaction zone in the presence of a catalyst of a tellurium metal ion and an iodide source, said carboxylates being the same as the carboxylate group in said carboxylic acid.
Claim 2
Dependent Claim
68 words
A process for preparing vicinal hydroxycarboxylates and vicinal dicarboxylates which comprises contacting an olefin with molecular oxygen in the liquid phase in the presence of a carboxylic acid at a temperature of at least 160° C. in a reaction zone in the presence of a catalyst of a tellurium metal ion and an iodide source, said carboxylates being the same as the carboxylate group in said carboxylic acid.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said carboxylic acid has from 2 to 4 carbon atoms.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the olefin is ethylene, propylene or butylene.
Claim 5
Dependent Claim
31 words
The process of claim 1 wherein the tellurium metal ion is introduced into the reaction zone as metallic tellurium, tellurium dioxide, tellurium iodide, tellurium carbonate, tellurium hydroxide or a tellurium carboxylate.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein said iodide source is elemental iodine, hydrogen iodide, an alkaline earth or an alkali metal iodide or an iodo-organic compound.
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein the temperature is from 160° to 190° C. and the pressure from 50 to 1000 psia.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the oxygen concentration in the feed gas ranges from about 5 to 25 volume %.
Claim 9
Dependent Claim
30 words
The process of claim 1 wherein the iodide concentration is from 0.5 to 15 weight % and the ratio of atoms of iodide to tellurium is between 1 and 20.
Claim 10
Dependent Claim
30 words
The process of claim 1 wherein the iodide concentration is between 3 and 8 weight percent and the ratio of atoms of iodide to tellurium is between 4 and 14.
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein the temperature is not greater than about 240° C.
References Cited (Backward Citations)
US3479395A
Cited
US3637515A
Cited
US3689535A
Cited
US3668239A
Cited
US3770813A
Cited
US3907874A
Cited
US3872164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |