US4777315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for trimerization
Assignee: Union Carbide Corp
•
Filing: 1987-06-01
•
Granted: 1988-10-11
•
Expires: 2007-06-01
Abstract
Abstract A process for the trimerization of an olefin selected from the group consisting of ethylene, propylene, 1-butene, and mixtures thereof comprising passing the olefin and carbon dioxide in contact with a catalyst comprising the reaction product of (i) a chromium compound, which will provide active catalytic species under trimerization conditions, and (ii) a hydrocarbyl aluminum hydrolyzed with about 0.7 to about 1.1 moles of water per mole of aluminum compound wherein the aluminum to chromium mole ratio is in the range of up to about 200 to one and the mole ratio of olefin to carbon dioxide is in the range of about 4 to about 3000 moles of olefin per mole of carbon dioxide.
Inventors
- 👤 Isaac J. Levine
- 👤 Frederick J. Karol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:47
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
A process for the trimerization of an olefin selected from the group consisting of ethylene, propylene, 1-butene, and mixtures thereof comprising passing the olefin and carbon dioxide in contact with a catalyst comprising the reaction product of (i) a chromium compound, which will provide active catalytic species under trimerization conditions, and (ii) a hydrocarbyl aluminum hydrolyzed with about 0.7 to about 1.1 moles of water per mole of aluminum compound wherein the aluminum to chromium mole ratio is in the range of up to about 200 to one and the mole ratio of olefin to carbon dioxide is in the range of about 4 to about 3000 moles of olefin per mole of carbon dioxide.
Claim 2
Dependent Claim
115 words
A process for the trimerization of an olefin selected from the group consisting of ethylene, propylene, 1-butene, and mixtures thereof comprising passing the olefin and carbon dioxide in contact with a catalyst comprising the reaction product of (i) a chromium compound, which will provide active catalytic species under trimerization conditions, and (ii) a hydrocarbyl aluminum hydrolyzed with about 0.7 to about 1.1 moles of water per mole of aluminum compound wherein the aluminum to chromium mole ratio is in the range of up to about 200 to one and the mole ratio of olefin to carbon dioxide is in the range of about 4 to about 3000 moles of olefin per mole of carbon dioxide.
Claim 3
Dependent Claim
51 words
The process defined in claim 1 wherein the catalyst is the reaction product of components (i) and (ii) and a donor liqand selected from the group consisting of hydrocarbyl isonitriles, amines, and ethers wherein the ligand to chromium mole ratio is in the range of up to about 100 to one.
Claim 4
Dependent Claim
33 words
The process defined in claim 1 wherein the mole ratio of olefin to carbon dioxide is in the range of about 20 to about 1500 moles of olefin per mole of carbon dioxide.
Claim 5
Dependent Claim
33 words
The process defined in claim 2 wherein the mole ratio of olefin to carbon dioxide is in the range of about 20 to about 1500 moles of olefin per mole of carbon dioxide.
Claim 6
Dependent Claim
15 words
The process defined in claim 2 wherein each ligand has 1 to 20 carbon atoms.
Claim 7
Dependent Claim
27 words
The process defined in claim 1 wherein the aluminum to chromium mole ratio is in the range of about one to one to about 100 to one.
Claim 8
Dependent Claim
27 words
The process defined in claim 2 wherein the ligand to chromium mole ratio is in the range of about one to one to about 100 to one.
Claim 9
Dependent Claim
27 words
The process defined in claim 4 wherein the ligand to chromium mole ratio is in the range of about one to one to about 40 to one.
Claim 10
Dependent Claim
33 words
The process defined in claim 7 wherein the olefin is ethylene and the donor ligand is CH 3 O(CH 2 CH 2 O) n CH 3 and n is 1, 2, or 3.
Claim 11
Dependent Claim
17 words
The process defined in claim 7 wherein the olefin is ethylene and the donor ligand is tert-butylisonitrile.
Claim 12
Dependent Claim
17 words
The process defined in claim 7 wherein the donor ligand is incorporated into the hydrocarbyl aluminum structure.
Claim 13
Dependent Claim
17 words
The process defined in claim 3 wherein the process is carried out in a solvent comprising 1-hexene.
Claim 14
Dependent Claim
11 words
The process defined in claim 3 wherein the olefin is ethylene.
Claim 15
Dependent Claim
23 words
The process defined in claim 3 wherein the trimerization is effected at a temperature of at about 70° C. to about 140° C.
References Cited (Backward Citations)
US4528414A
Cited
US4668838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |