Patent US3725482A successfully refreshed from Google Patents.
US3725482A
Expired / Lapsed
US
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Propylene oxidation in the presence of gold metal
Assignee: Gulf Research and Development Co
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Filing: 1969-09-16
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Granted: 1973-04-03
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Expires: 1989-09-16
Abstract
Abstract Propylene is oxidized with oxygen to primarily acrolein by oxidation in the contact presence of gold metal.
Inventors
- 👤 N Cant
- 👤 W Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:49
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
35 words
A process according to claim 1 wherein the reaction occurs at a partial pressure of oxygen above about 0.05 pounds per square inch absolute and a propylene space velocity from about 1 to about 2,000.
Claim 2
Dependent Claim
23 words
The process of claim 2 wherein the temperature in the reaction zone is maintained in the range of about 200* to about 350*C.
Claim 3
Dependent Claim
27 words
A process according to claim 2 wherein the partial pressure of oxygen is within the range of about 1 to about 4 pounds per square inch absolute.
Claim 4
Dependent Claim
53 words
A process for producing a product comprising acrolein, which process comprises reacting propylene at a temperature from 150*C. to 450*C. with a gas containing free molecular oxygen in the presence of a catalyst consisting of gold metal and a support selected from the group consisting of silica, magnesia, alumina, thoria and mixtures thereof.
Claim 5
Dependent Claim
33 words
A process according to claim 5 wherein the reaction occurs at a temperature from 200*C. to 350*C. and the amount of gold is between 1 and 10 weight percent of the total catalyst.
Claim 6
Dependent Claim
16 words
A process according to claim 5 wherein the gold is deposited from an organic solvent solution.
Claim 7
Dependent Claim
12 words
A process according to claim 7 wherein the organic solvent is acetone.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |