US4507495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of ethyl acrylate
Assignee: Celanese International Corp
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Filing: 1983-07-05
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Granted: 1985-03-26
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Expires: 2003-07-05
Abstract
Abstract In the process of producing ethyl acrylate by the reaction of ethylene and acrylic acid in the presence of sulfuric acid, using phenolic type inhibitors, soluble manganese or cerium salts are additionally utilized.
Inventors
- 👤 Edward F. Dougherty
- 👤 Mark O. Scates
- 👤 James L. Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:53
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/50; C07C67/00; C07C67/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
41 words
In a process for the production of ethyl acrylate by reacting ethylene and acrylic acid in the presence of sulfuric acid, the improvement comprising adding metal ions selected from the group consisting of soluble manganese and cerium to the reaction mixture.
Claim 2
Dependent Claim
41 words
In a process for the production of ethyl acrylate by reacting ethylene and acrylic acid in the presence of sulfuric acid, the improvement comprising adding metal ions selected from the group consisting of soluble manganese and cerium to the reaction mixture.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein the metal ions present are from about 5 parts per million to about 5000 parts per million of the total reaction mixture.
Claim 4
Dependent Claim
28 words
The process of claim 2 wherein the metal ions present are from about 25 parts per million to about 500 parts per million of the total reaction mixture.
Claim 5
Dependent Claim
14 words
The process of claim 3 wherein manganous acetate is added to the reaction mixture.
Claim 6
Dependent Claim
14 words
The process of claim 3 wherein cerous acetate is added to the reaction mixture.
Claim 7
Dependent Claim
15 words
The process of claim 3 wherein ceric ammonium nitrate is added to the reaction mixture.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein a phenolic type polymerization inhibitor combined with the metal ions is added to the reaction mixture.
Claim 9
Dependent Claim
51 words
The process of claim 7 wherein the metal ions present are from about 5 parts per million to about 5,000 parts per million of the total reaction mixture and from about 5 parts per million to about 5,000 parts per million of a phenolic type inhibitor of the total reaction mixture.
Claim 10
Dependent Claim
52 words
The process of claim 7 wherein the metal ions present are from about 25 parts per million to about 500 parts per million of the total reaction mixture and from about 25 parts per million to about 500 parts per million of a phenolic type inhibitor based on the total reaction product.
Claim 11
Dependent Claim
17 words
The process claim 9 wherein the metal ion is manganese and the phenolic type inhibitor is hydroquinone.
Claim 12
Dependent Claim
19 words
The process of claim 9 wherein the metal ion is manganese and the phenolic type inhibitor is p-methoxy phenol.
Claim 13
Dependent Claim
18 words
The process of claim 9 wherein the metal ion is manganese and the phenolic type inhibitor is catechol.
Claim 14
Dependent Claim
18 words
The process of claim 9 wherein the metal ion is manganese and the phenolic type inhibitor is guaiacol.
Claim 15
Dependent Claim
18 words
The process of claim 9 wherein the metal ion is cerium and the phenolic type inhibitor is hydroquinone.
Claim 16
Dependent Claim
19 words
The process of claim 9 wherein the metal ion is cerium and the phenolic type inhibitor is p-methoxy phenol.
Claim 17
Dependent Claim
18 words
The process of claim 9 wherein the metal ion is cerium and the phenolic type inhibitor is catechol.
Claim 18
Dependent Claim
18 words
The process of claim 9 wherein the metal ion is cerium and the phenolic type inhibitor is guaiacol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |