US4032591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alpha-olefin oligomer synthetic lubricant
Assignee: Chevron USA Inc
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Filing: 1975-11-24
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Granted: 1977-06-28
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Expires: 1995-11-24
Abstract
Abstract An alpha-olefin oligomer synthetic lubricant having an improved viscosity-volatility relationship is prepared from an alpha-olefin such as 1-decene.
Inventors
- 👤 Barrett L. Cupples
- 👤 William J. Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:56
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C5/00; C07C5/02; C07C5/13; C07C9/00; C07C9/22; C10M2205/00; C10M2205/02; C10M2205/028; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
The process for skeletally isomerizing a liquid alpha-olefin oligomer comprising the trimer, tetramer, pentamer or mixtures thereof of a normal 1-olefin selected from 1-octene, 1-decene, 1-dodecene or a mixture thereof prepared by the cationic oligomerization of said 1-olefin which comprises introducing the liquid alpha-olefin oligomer into the top of a column packed with pellets of a metallic hydrogenation catalyst in the presence of hydrogen at a pressure and a temperature suitable for hydrogenation and permitting the liquid oligomer to trickle through said catalyst bed over the surface of said catalyst, whereby the liquid is substantially present in said column as a thin film on said catalyst pellets.
Claim 2
Dependent Claim
107 words
The process for skeletally isomerizing a liquid alpha-olefin oligomer comprising the trimer, tetramer, pentamer or mixtures thereof of a normal 1-olefin selected from 1-octene, 1-decene, 1-dodecene or a mixture thereof prepared by the cationic oligomerization of said 1-olefin which comprises introducing the liquid alpha-olefin oligomer into the top of a column packed with pellets of a metallic hydrogenation catalyst in the presence of hydrogen at a pressure and a temperature suitable for hydrogenation and permitting the liquid oligomer to trickle through said catalyst bed over the surface of said catalyst, whereby the liquid is substantially present in said column as a thin film on said catalyst pellets.
Claim 3
Dependent Claim
13 words
The process in accordance with claim 1 in which said 1-olefin is 1-decene.
Claim 4
Dependent Claim
24 words
The process in accordance with claim 2 in which said catalyst has an average particle size between about 1.5 mm. and about 6 mm.
Claim 5
Dependent Claim
27 words
The process in accordance with claim 2 in which the contact time of said liquid oligomer with said catalyst is sufficient to substantially completely hydrogenate said oligomer.
Claim 6
Dependent Claim
20 words
The process in accordance with claim 2 in which the temperature is between about 100° C. and about 300° C.
Claim 7
Dependent Claim
21 words
The process in accordance with claim 2 in which the hydrogen pressure is between about 200 psi. and about 2,000 psi.
References Cited (Backward Citations)
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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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |