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US4599476A
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Process for the preparation of dimerization products from olefins
Assignee: Shell USA Inc
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Filing: 1985-10-03
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Granted: 1986-07-08
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Expires: 2005-10-03
Abstract
Abstract A process for the preparation of dimerization products from aliphatic mono-olefins having 2 to about 12 carbon atoms in which the aliphatic mono-olefin is contacted with a catalytic system formed by combining a palladium and/or ruthenium compound and an acid with a pKa of less than 2, except hydrohalogenic acids in an aprotic organic solvent.
Inventors
- 👤 Eit Drent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:03
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/30; C07C67/333; C07C67/343; C07C67/347; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2/26; C07C2/32; C07C2/36; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2531/00; C07C2531/02; C07C2531/025; C07C2531/16; C07C2531/22; C07C2531/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
52 words
A process for the preparation of dimerization products from aliphatic mono-olefins having 2-12 carbon atoms which process comprises contacting the aliphatic mono-olefin with a catalytic system formed by combining a palladium and/or ruthenium compound and an acid with a pKa of less than 2, except hydrohalogenic acids, in an aprotic organic solvent.
Claim 2
Dependent Claim
52 words
A process for the preparation of dimerization products from aliphatic mono-olefins having 2-12 carbon atoms which process comprises contacting the aliphatic mono-olefin with a catalytic system formed by combining a palladium and/or ruthenium compound and an acid with a pKa of less than 2, except hydrohalogenic acids, in an aprotic organic solvent.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the acid with a pKa of less than 2 is HBF 4 .
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the acid with a pKa of less than 2 is a sulfonic acid.
Claim 5
Dependent Claim
23 words
The process of claim 3 wherein the acid with a pKa of less than 2 is a trifluoromethane sulfonic acid or p-toluenesulfonic acid.
Claim 6
Dependent Claim
66 words
The process of claim 1 wherein the catalytic system is formed by combining the palladium and/or ruthenium compound, a ligand containing at least one atom of the Group Va of Periodic System of Elements as coordinating atom and the acid with a pKa of less than 2 in a quantity of more than 1 equivalent acid per gram atom Group Va atom present in the ligand.
Claim 7
Dependent Claim
33 words
The process of claim 5 wherein the ligand is a monodentate ligand which comprises a compound containing one trivalent N or P atom which is bonded to at least one aromatic hydrocarbon group.
Claim 8
Dependent Claim
15 words
The process of claim 6 wherein the monodentate ligand comprises N,N'-dimethylaniline or a derivative thereof.
Claim 9
Dependent Claim
15 words
The process of claim 6 wherein the monodentate ligand comprises triphenylphosphine or a derivative thereof.
Claim 10
Dependent Claim
26 words
The process of claim 6 wherein the monodentate ligand comprises a compound containing a trivalent N atom, which is a member of a heterocyclic aromatic ring.
Claim 11
Dependent Claim
15 words
The process of claim 9 wherein the monodentate ligand comprises pyridine or a derivative thereof.
Claim 12
Dependent Claim
40 words
The process of claim 5 wherein the ligand is a chelate ligand which comprises a compound containing at least two atoms of Group Va of the Periodic System of Elements, which are connected through a chain comprising 2-6 carbon atoms.
Claim 13
Dependent Claim
23 words
The process of claim 11 wherein the chelate ligand comprises a compound which contains in the molecule a group of the formula ##STR2##
Claim 14
Dependent Claim
22 words
The process of claim 5 wherein the quantity of ligand is at least 1 mol ligand per gram atom palladium and/or ruthenium.
Claim 15
Dependent Claim
30 words
The process of claim 1 wherein the quantity of the acid with a pKa of less than 2 is at least 10 equivalent acid per gram atom palladium and/or ruthenium.
Claim 16
Dependent Claim
11 words
The process of claim 1 wherein the aliphatic mono-olefin is ethene.
Claim 17
Dependent Claim
11 words
The process of claim 1 wherein the aliphatic mono-olefin is propene.
References Cited (Backward Citations)
GB1153519A
Cited
SU374930A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |