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Patent US4111986A successfully refreshed from Google Patents.
US4111986A
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Butane oxidation to acetic acid
Assignee: BP Corp North America Inc
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Filing: 1977-04-19
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Granted: 1978-09-05
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Expires: 1997-04-19
Abstract
Abstract Oxidizing butane to acetic acid which comprises contacting a sufficient concentration of an oxygen-containing gas with normal butane in the presence of catalyst consisting essentially of bromine and cobalt to initiate a self-sustaining exothermic reaction.
Inventors
- 👤 Wilford J. Zimmerschied
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:15
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
The process of oxidizing butane to acetic acid which comprises contacting a sufficient concentration of an oxygen-containing gas with normal liquid butane in the presence of a dissolved catalyst consisting essentially of bromine and cobalt in a solvent medium comprising acetic acid to initiate a self-sustaining exothermic reaction, wherein each 100 grams of butane is contacted with oxygen at a rate of at least 5 liters of oxygen per hour.
Claim 2
Dependent Claim
70 words
The process of oxidizing butane to acetic acid which comprises contacting a sufficient concentration of an oxygen-containing gas with normal liquid butane in the presence of a dissolved catalyst consisting essentially of bromine and cobalt in a solvent medium comprising acetic acid to initiate a self-sustaining exothermic reaction, wherein each 100 grams of butane is contacted with oxygen at a rate of at least 5 liters of oxygen per hour.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein an oxygen containing gas is injected below the surface of the reaction medium at a rate sufficient to initiate a self-sustaining exothermic reaction.
Claim 4
Dependent Claim
34 words
The process of claim 2 wherein the catalyst components are present in a concentration of from about 1 to 50 milliequivalents of cobalt and 2 to 500 milliequivalents of bromine per mole of butane.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein said catalyst is cobaltous bromide.
Claim 6
Dependent Claim
33 words
The process of claim 1 wherein each 100 grams of butane is contacted with oxygen at a rate of at least 10 liters of oxygen per hour to initiate said self-sustaining exothermic reaction.
Claim 7
Dependent Claim
28 words
The process of claim 5 wherein an oxygen-containing gas is injected below the surface of the reaction medium at a rate sufficient to initiate a self-sustaining exothermic reaction.
Claim 8
Dependent Claim
34 words
The process of claim 6 wherein the catalyst components are present in a concentration of from about 1 to 50 milliequivalents of cobalt and 2 to 500 milliequivalents of bromine per mole of butane.
References Cited (Backward Citations)
US3247249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |