Patent US4511746A successfully refreshed from Google Patents.
US4511746A
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Low activity catalyst oligomerization process
Assignee: Chevron USA Inc
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Filing: 1981-09-25
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Granted: 1985-04-16
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Expires: 2001-09-25
Abstract
Abstract A process for the pure oligomerization of C 2 -C 6 alkenes over low hydrogen transfer activity molecular sieves is disclosed.
Inventors
- 👤 Stephen J. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:52
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/12; C07C2/24; C07C2523/00; C07C2523/06; C07C2529/00; C07C2529/03; C07C2529/035; C07C2529/04; C07C2529/06; C07C2529/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
An alkene oligomerization process comprising: (a) contacting a C 2 to C 6 alkene with an essentially alumina-free molecular sieve selected from the group consisting of silicalite, RE 29,948 organosilicate, or CZM at a temperature of less than 350° C. and a pressure greater than about 40 bar; and (b) recovering an effluent comprising substantial amounts of olefin multimers containing from 2 to 5 units of said alkene.
Claim 2
Dependent Claim
68 words
An alkene oligomerization process comprising: (a) contacting a C 2 to C 6 alkene with an essentially alumina-free molecular sieve selected from the group consisting of silicalite, RE 29,948 organosilicate, or CZM at a temperature of less than 350° C. and a pressure greater than about 40 bar; and (b) recovering an effluent comprising substantial amounts of olefin multimers containing from 2 to 5 units of said alkene.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein at least some of said multimers are liquids under said oligomerization conditions.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein said oligomerization conditions include a pressure greater than about 65 bar.
Claim 5
Dependent Claim
29 words
The process of claim 1, further comprising the steps of: separating unreacted alkenes present in said effluent from said alkene multimers; and recycling said unreacted alkenes into said feed.
Claim 6
Dependent Claim
24 words
The process of claim 1, further comprising the step of: alkylating an aromatic compound with at least part of said multimers under alkylation conditions.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said aromatic compound is benzene.
Claim 8
Dependent Claim
23 words
The process of claim 1, wherein said catalyst further comprises zinc or a compound thereoff, cadmium or a compound thereoff, or mixtures thereoff.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |