Patent US3674813A successfully refreshed from Google Patents.
US3674813A
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Method of producing propylene oxide,propyleneglycol and its esters
Assignee: Individual
•
Filing: 1967-06-19
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Granted: 1972-07-04
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Expires: 1987-06-19
Abstract
Abstract Propylene oxide, propylene glycol and esters thereof are produced by oxidizing propylene with an oxygen containing gas in an inert solvent at a temperature of at least 120* C. and a pressure of 50 to 10 atm in the presence of fluorine containing catalysts.
Inventors
- 👤 Erna Albertovna Bljumberg
- 👤 Alexandr Vasilievich Bobolev
- 👤 Svetlana Pavlovna Boboleva
- 👤 Nikolai Markovich Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:54
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/06; C07C; C07C31/00; C07C31/18; C07C31/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
11 words
A method according to claim 1, wherein the catalyst is K2SiF6.
Claim 2
Dependent Claim
11 words
A method according to claim 1, wherein the catalyst is NaF.
Claim 3
Dependent Claim
11 words
A method according to claim 1, wherein the catalyst is K2TaF7.
Claim 4
Dependent Claim
89 words
A process for producing propylene oxide by direct oxidation which comprises dissolving propylene in an inert solvent selected from the group consisting of benzene and acetone and effecting oxidation at a temperature of at least 120* C by feeding into the solution an oxygen-containing gas maintained at a pressure of from 50 atm to 100 atm, wherein the reaction mixture consisting of propylene and oxygen dissolved in said solvent is contacted with a fluorine-containing salt of a metal selected from the group consisting of alkali and alkaline earth metals.
Claim 5
Dependent Claim
15 words
A process according to claim 5, wherein the fluorine-containing salt is K2SiF6, NaF or K2TaF7.
Claim 6
Dependent Claim
14 words
A method according to claim 1 wherein the temperature is 120* to 145* C.
Claim 7
Dependent Claim
14 words
A process according to claim 5 wherein the temperature is 120* to 145* C.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |