US3980690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the carboxylation of alcohols in heterogeneous phase
Assignee: SnamProgetti SpA
•
Filing: 1974-07-25
•
Granted: 1976-09-14
•
Expires: 1994-07-25
Abstract
Abstract An alcohol is carboxylated into the corresponding carbonate by reacting the alcohol with oxygen and carbon dioxide in the presence of a catalyst system in the heterogeneous phase by introducing the reactants into a reactor charged with a catalyst, such as the complex system formed by copper and 4-vinylpyridine, causing the reactants to flow over the catalyst, and then withdrawing the products of the reaction and unconsumed reactants from the reactor.
Inventors
- 👤 Gioacchino Cipriani
- 👤 Emilio Perrotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:21
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1805; B01J31/181; C; C07; C07C; C07C68/00; C07C68/01; B01J2531/00; B01J2531/10; B01J2531/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A process of carboxylating an alcohol into the corresponding carbonate by reacting the alcohol with oxygen and carbon monoxide in the presence of a catalyst in the disperse phase, wherein said reactants are fed to a reactor charged with a catalyst consisting of a complex of copper chloride and poly-4-vinylpyridine, causing said reactants to flow over said catalyst, and then withdrawing reaction products and unconsumed reactants from the reactor.
Claim 2
Dependent Claim
69 words
A process of carboxylating an alcohol into the corresponding carbonate by reacting the alcohol with oxygen and carbon monoxide in the presence of a catalyst in the disperse phase, wherein said reactants are fed to a reactor charged with a catalyst consisting of a complex of copper chloride and poly-4-vinylpyridine, causing said reactants to flow over said catalyst, and then withdrawing reaction products and unconsumed reactants from the reactor.
Claim 3
Dependent Claim
33 words
A process for the carboxylation of an alcohol into the corresponding carbonate as claimed in Claim 1 wherein the reaction is carried out at a temperature in the range of 50° to 80°C.
Claim 4
Dependent Claim
35 words
A process for the carboxylation of an alcohol into the corresponding carbonate as claimed in claim 1, wherein the reaction is carried out at a pressure in the range of from one to 200 atmospheres.
Claim 5
Dependent Claim
23 words
A process for the carboxylation of an alcohol into the corresponding carbonate as claimed in claim 1, wherein the alcohol is methyl alcohol.
References Cited (Backward Citations)
US3114762A
Cited
US3227740A
Cited
US3227741A
Cited
US3445497A
Cited
US3625995A
Cited
US3846468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |