US3622648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimerization of olefins
Assignee: BASF SE
•
Filing: 1968-05-17
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Granted: 1971-11-23
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Expires: 1988-05-17
Abstract
Abstract An improved process for the dimerization of olefins in the presence of alkali metal catalysts at 60* to 200* C. and at atmospheric pressure up to 300 atmospheres, catalysts being used which have been derived from an alkali metal and an organic compound containing one or more than one carbonyl group. The process is particularly suitable for effective and selective dimerization of propylene to 4-methylpentene-1. Some of the dimers obtained are suitable as antiknock additives and for the production of polymers.
Inventors
- 👤 Karl Schloemer
- 👤 Hugo Kroeper
- 👤 Hans-Martin Weitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:17
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/32; C07C2523/00; C07C2523/02; C07C2523/04; C07C2531/00; C07C2531/16; C07C2531/22; C07C2531/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
A process as claimed in claim 1 in which the alkali metal used is potassium.
Claim 2
Dependent Claim
25 words
A process as claimed in claim 2 wherein said mono-olefin hydrocarbon is propylene and the produced dimers are 4-methylpentene-1 and other methyl pentene isomers thereof.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein the dimerization is carried out in the presence of an inert organic solvent.
Claim 4
Dependent Claim
23 words
A process as claimed in claim 1 wherein the dimerization is carried out in the presence of a saturated aliphatic hydrocarbon as solvent.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a temperature of from 100* to 150* C.
Claim 6
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a pressure of from 30 to 80 atmospheres.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 1 wherein said chelate complex is nickel (II) acetylacetonate, cobalt (III) acetylacetonate, or nickel (III) benzoyl acetonate.
Claim 8
Dependent Claim
25 words
A process as claimed in claim 8 wherein said mono-olefin hydrocarbon is propylene and the produced dimers are 4-methylpentene-1 and other methyl pentene isomers thereof.
References Cited (Backward Citations)
US2781410A
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US2969408A
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US2994725A
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US3075027A
Cited
US3053916A
Cited
US3217050A
Cited
US3251895A
Cited
US3243467A
Cited
US3483268A
Cited
US3431318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |