US3624175A
Expired / Lapsed
US
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Oligomerization of butadiene
Assignee: Phillips Petroleum Co
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Filing: 1970-06-25
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Granted: 1971-11-30
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Expires: 1990-06-25
Abstract
Abstract Butadiene is oligomerized with a catalyst formed by mixing a conjugated diene-organolithium adduct with a cobalt compound.
Inventors
- 👤 Ernest A Zuech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:06
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/02; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2527/00; C07C2527/06; C07C2527/128; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A cobalt compound wherein the anionic moiety of said cobalt compound is selected from halides, salts of mono-, di-, and tribasic organic acids containing from two to 20 carbon atoms per molecule, chelates of Beta -diketones having the formula wherein each R'' is a radical containing from one to 10 carbon atoms and individually selected from the group consisting of saturated aliphatic, saturated cycloaliphatic, aromatic, and combinations thereof.
Claim 2
Dependent Claim
116 words
The method according to claim 1 wherein said adduct is formed by contacting said conjugated diene and said organolithium compound at a temperature of from -10* C. to 80* C., a pressure sufficient to maintain reactants substantially in a liquid phase, and using a ratio of moles of said conjugated diene to molar equivalents of lithium in the range of from 1:1 to 25:1; and wherein said adduct is contacted with said cobalt compound at a temperature in the range of from -80* C. to 80* C., a pressure sufficient to maintain reactants substantially in a liquid phase, and using from 2:1 to 6:1 molar equivalents of lithium per mole of cobalt in said cobalt compound.
Claim 3
Dependent Claim
32 words
The method according to claim 2 wherein said reaction conditions include a temperature of from 10* C. to 200* C., and a pressure sufficient to maintain reactants substantially in a liquid phase.
Claim 4
Dependent Claim
63 words
The method according to claim 2 wherein said adduct is formed in the further presence of a diluent, said diluent is selected from the group consisting of ethers containing from four to 10 carbon atoms per molecule, hydrocarbons containing from four to 10 carbon atoms pr molecule and selected from the group consisting of aliphatic, cycloaliphatic, aromatic, and combinations thereof, and mixtures thereof.
Claim 5
Dependent Claim
63 words
The method according to claim 2 wherein said catalyst is formed in the further presence of a diluent, said diluent is selected from the group consisting of ethers containing from four to 10 CARBON atoms per molecule, hydrocarbons containing from four to 10 carbon atoms per molecule and selected from the group consisting of aliphatic, cycloaliphatic, aromatic, and combinations thereof, and mixtures thereof.
Claim 6
Dependent Claim
23 words
The method according to claim 5 wherein said organolithium compound is an alkyl lithium containing from two to 6 carbon atoms per molecule.
Claim 7
Dependent Claim
13 words
The method according to claim 6 wherein said cobalt compound is cobalt acetylacetonate.
Claim 8
Dependent Claim
12 words
The method according to claim 7 wherein said alkyl lithium is n-butyllithium.
References Cited (Backward Citations)
US3219716A
Cited
US3249641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |