US4000185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 1,4-diacyloxy-2-butene from butadiene
Assignee: Chevron USA Inc
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Filing: 1975-02-11
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Granted: 1976-12-28
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Expires: 1995-02-11
Abstract
Abstract 1,4-DIACYLOXY-2-BUTENE USEFUL AS A DIOL PRECURSOR IS PRODUCED BY REACTING BUTADIENE WITH AN ALKALI METAL SALT IN THE PRESENCE OF IODINE, IODINE MONOCHLORIDE OR IODINE TRICHLORIDE.
Inventors
- 👤 Victor P. Kurkov
- 👤 Seymour J. Lapporte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:32
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A process for the preparation of 1,4-diacyloxy-2-butene which comprises contacting one mol of butadiene with from about 2 to about 6 mols of an alkali metal salt of a lower fatty acid, in the presence of at least 1 mol relative to butadiene of a halogen selected from the group consisting of I 2 , ICl, or ICl 3 , the reaction being carried out under substantially anhydrous conditions at a temperature in the range from about 50° C to about 200° C for a period of from about 1/2 to about 24 hours.
Claim 2
Dependent Claim
94 words
A process for the preparation of 1,4-diacyloxy-2-butene which comprises contacting one mol of butadiene with from about 2 to about 6 mols of an alkali metal salt of a lower fatty acid, in the presence of at least 1 mol relative to butadiene of a halogen selected from the group consisting of I 2 , ICl, or ICl 3 , the reaction being carried out under substantially anhydrous conditions at a temperature in the range from about 50° C to about 200° C for a period of from about 1/2 to about 24 hours.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which the fatty acid salt is potassium or sodium acetate.
Claim 4
Dependent Claim
24 words
The process of claim 1 in which the halogen is employed in a molar amount relative to butadiene of from about 1:1 to 3:1.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the reaction is carried out in the presence of a water-absorbing solvent.
Claim 6
Dependent Claim
17 words
The process of claim 4 in which the solvent is an anhydride of a lower aliphatic acid.
Claim 7
Dependent Claim
12 words
The process of claim 5 in which the anhydride is acetic anhydride.
Claim 8
Dependent Claim
66 words
A process for preparing 1,4-diacyloxy-2-butene which comprises contacting butadiene and an alkali metal salt of a lower fatty acid, in the presence of a catalytic amount of a halogen selected from the group consisting of I 2 , ICl, or ICl 3 , the reaction being carried out in the presence of acetic anhydride and an oxidant selected from the group consisting of air or oxygen.
Claim 9
Dependent Claim
66 words
A process for preparing 1,4-diacyloxy-2-butene which comprises contacting butadiene and an alkali metal salt of a lower fatty acid, in the presence of a catalytic amount of a halogen selected from the group consisting of I 2 , ICl, or ICl 3 , the reaction being carried out in the presence of acetic anhydride and an oxidant selected from the group consisting of air or oxygen.
References Cited (Backward Citations)
GB1138366A
Cited
US3770813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |