US3723510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing acetic esters of butenediol
Assignee: Tosoh Corp
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Filing: 1971-12-09
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Granted: 1973-03-27
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Expires: 1991-12-09
Abstract
Abstract Acetic esters of butenediol are prepared by the reaction of butadiene, an oxygen containing gas and acetic acid in the presence of a catalytic amount of a catalyst system of at least one member being cupric bromide (II) and/or cupric acetate (II), and at least one member being an alkali or alkaline earth metal salt acetate and/or bromide.
Inventors
- 👤 H Okada
- 👤 T Uotani
- 👤 I Ono
- 👤 T Yanagihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:49
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/26; B01J31/28; B01J31/30; B01J27/00; B01J27/06; B01J27/08; B01J31/02; B01J31/04; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C69/00; C07C69/02; C07C69/12; C07C69/16; B01J2231/00; B01J2231/30; B01J2231/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
15 words
The process according to claim 1, wherein the alkali metal is lithium, sodium or potassium.
Claim 2
Dependent Claim
16 words
The process according to claim 1, wherein the alkaline earth metal is barium, magnesium or calcium.
Claim 3
Dependent Claim
26 words
The process according to claim 1, wherein the quantity of cupric salt is in the range of 0.02 to 2.0 moles per liter of reaction liquor.
Claim 4
Dependent Claim
29 words
The process according to claim 1, wherein the quantity of the alkali or alkaline earth metal compound is 0.1 to 10 weight equivalents per weight equivalent of cupric salt.
Claim 5
Dependent Claim
17 words
The process according to claim 1, wherein the reaction temperature is from room temperature to 200* C.
Claim 6
Dependent Claim
13 words
The process according to claim 1, wherein the pressure is at least atmospheric.
Claim 7
Dependent Claim
13 words
The process according to claim 1, wherein the oxygen containing gas is air.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |