US4384153A
Expired / Lapsed
US
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Diels-Alder Cyclization over low acidity large-pore zeolites
Assignee: Mobil Oil AS
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Filing: 1982-03-18
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Granted: 1983-05-17
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Expires: 2002-03-18
Abstract
Abstract The present invention provides a process which is adapted for cyclodimerization of 1,3-butadiene to 4-vinylcyclohexene-1 under Diels-Alder conditions in the presence of a low acidity form of a large-pore zeolite such as ZSM-20, beta or Y.
Inventors
- 👤 Ralph M. Dessau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:55
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/50; C07C2/52; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
A process for cyclodimerization of a conjugated alkadiene which comprises contacting a conjugated alkadiene-containing feedstock with ZSM-20 zeolite catalyst having an Alpha value less than about 1.0, at a temperature between about 150°-300° C. to yield cyclodimerized product.
Claim 2
Dependent Claim
38 words
A process for cyclodimerization of a conjugated alkadiene which comprises contacting a conjugated alkadiene-containing feedstock with ZSM-20 zeolite catalyst having an Alpha value less than about 1.0, at a temperature between about 150°-300° C. to yield cyclodimerized product.
Claim 3
Dependent Claim
19 words
A process in accordance with claim 1 wherein the conjugated alkadiene is 1,3-butadiene, and the cyclodimerized product is 4-vinylcyclohexene-1.
Claim 4
Dependent Claim
38 words
A process for cyclodimerization of a conjugated alkadiene which comprises contacting a conjugated alkadiene-containing feedstock with beta zeolite catalyst having an Alpha value less than about 1.0, at a temperature between about 150°-300° C. to yield cyclodimerized product.
Claim 5
Dependent Claim
38 words
A process for cyclodimerization of a conjugated alkadiene which comprises contacting a conjugated alkadiene-containing feedstock with beta zeolite catalyst having an Alpha value less than about 1.0, at a temperature between about 150°-300° C. to yield cyclodimerized product.
Claim 6
Dependent Claim
19 words
A process in accordance with claim 3 wherein the conjugated alkadiene is 1,3-butadiene, and the cyclodimerized product is 4-vinylcyclohexene-1.
References Cited (Backward Citations)
GB1138126A
Cited
US3444253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |