Patent US4609501A successfully refreshed from Google Patents.
US4609501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of aromatic carbonates
Assignee: General Electric Co
•
Filing: 1983-12-27
•
Granted: 1986-09-02
•
Expires: 2003-12-27
Abstract
Abstract An improved process for the preparation of aromatic carbonates selected from aliphatic aromatic carbonates and diaromatic carbonates comprising reacting at least one phenolic compound with at least one dialiphatic carbonate or at least one aliphatic aromatic carbonate in the presence of a catalytic amount of a catalyst comprised of (i) at least one Lewis acid, and (ii) at least one protic acid.
Inventors
- 👤 Victor Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:24
CPC Classifications
C; C07; C07C; C07C68/00; C07C68/06; C07C69/00; C07C69/96
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
An improved process for preparing an aromatic carbonate selected from aliphatic aromatic carbonates represented by the formula ##STR8## and diaromatic carbonates represented by the formula ##STR9## which comprises reacting a phenolic compound with a dialiphatic carbonate represented by the formula ##STR10## or an aliphatic aromatic carbonate represented by the formula ##STR11## wherein Ar is selected from monovalent aromatic radicals and R is independently selected from monovalent aliphatic radicals in the presence of a catalytic amount of catalyst, the improvement consisting essentially of utilizing as the catalyst a physical admixture consisting essentially of (i) at least one Lewis acid, and (ii) at least one protic acid.
Claim 2
Dependent Claim
105 words
An improved process for preparing an aromatic carbonate selected from aliphatic aromatic carbonates represented by the formula ##STR8## and diaromatic carbonates represented by the formula ##STR9## which comprises reacting a phenolic compound with a dialiphatic carbonate represented by the formula ##STR10## or an aliphatic aromatic carbonate represented by the formula ##STR11## wherein Ar is selected from monovalent aromatic radicals and R is independently selected from monovalent aliphatic radicals in the presence of a catalytic amount of catalyst, the improvement consisting essentially of utilizing as the catalyst a physical admixture consisting essentially of (i) at least one Lewis acid, and (ii) at least one protic acid.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said catalytic amount is in the range of from about 0.01 to about 25 weight percent, based on the amount of dialiphatic carbonate or aliphatic aromatic carbonate utilized.
Claim 4
Dependent Claim
36 words
The process of claim 1 wherein said physical admixture of said Lewis acid and said protic acid contains a weight ratio of said Lewis acid to said protic acid of from about 20:1 to about 1:5.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein said protic acid is selected from inorganic protic acids.
Claim 6
Dependent Claim
26 words
The process of claim 4 wherein said inorganic protic acid is selected from HCl, HBr, H 2 SO 4 , and H 3 PO 4 .
Claim 7
Dependent Claim
15 words
The process of claim 3 wherein said protic acid is selected from organic protic acids.
Claim 8
Dependent Claim
16 words
The process of claim 6 wherein said organic protic acid is selected from organic sulfonic acids.
Claim 9
Dependent Claim
16 words
The process of claim 7 wherein said organic sulfonic acids are selected from alkyl sulfonic acids.
Claim 10
Dependent Claim
16 words
The process of claim 7 wherein said organic sulfonic acids are selected from aryl sulfonic acids.
Claim 11
Dependent Claim
16 words
The process of claim 6 wherein said organic protic acids are selected from organic phosphonic acids.
References Cited (Backward Citations)
US3255236A
Cited
US3767648A
Cited
US3808245A
Cited
US4182726A
Cited
FR2286157A1
Cited
US4045464A
Cited
US4112235A
Cited
US4410464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |