Patent US4078010A successfully refreshed from Google Patents.
US4078010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenated olefine oligomers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-07-11
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Granted: 1978-03-07
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Expires: 1995-07-11
Abstract
Abstract Oligomerizing propylene using a Friedel Crafts catalyst at a temperature in the range -10 DEG to 80 DEG C and hydrogenating the oligomer so obtained to produce oils useful as hydraulic fluids.
Inventors
- 👤 Marcel Prillieux
- 👤 Marcel Robert
- 👤 Robert Tirtiaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:53
CPC Classifications
C; C10; C10M; C10M143/00; C10G; C10G69/00; C10G69/02; C10G69/12; C10G69/126; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2205/06; C10M2205/10; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/08; C10N2040/14; C10N2040/16; C10N2040/17; C10N2040/175; C10N2040/18; C10N2040/185; C10N2040/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
Process for manufacturing selectively, with a high yield, a highly paraffinic hydraulic transmission oil consisting essentially of isoparaffins and substantially free of cycloparaffins and aromatics, for use in hydraulic systems having elastomeric seals, said oil being compatible with said seals and tending to shrink said seals when of polyurethane rubber, and said oil having a flash point above 100° C. and a viscosity within the range from 2 to 30 Centistokes at 37.8° C., said process comprising: oligomerising propylene, in the liquid phase, in the presence of a Friedel and Crafts catalyst, at a temperature between 20° C. and 80° C., separating the catalyst and propylene oligomer, and hydrogenating said oligomer or a fraction thereof to thereby obtain said oil.
Claim 2
Dependent Claim
120 words
Process for manufacturing selectively, with a high yield, a highly paraffinic hydraulic transmission oil consisting essentially of isoparaffins and substantially free of cycloparaffins and aromatics, for use in hydraulic systems having elastomeric seals, said oil being compatible with said seals and tending to shrink said seals when of polyurethane rubber, and said oil having a flash point above 100° C. and a viscosity within the range from 2 to 30 Centistokes at 37.8° C., said process comprising: oligomerising propylene, in the liquid phase, in the presence of a Friedel and Crafts catalyst, at a temperature between 20° C. and 80° C., separating the catalyst and propylene oligomer, and hydrogenating said oligomer or a fraction thereof to thereby obtain said oil.
Claim 3
Dependent Claim
36 words
A process according to claim 1 in which the catalyst comprises from 0.04 to 0.08% by weight of water and from 0.5% to 0.8% by weight of anhydrous boron trifluoride, based on the weight of propylene.
Claim 4
Dependent Claim
20 words
A process according to claim 1 in which the hydrogenation is continued until the bromine number is less than 1.
Claim 5
Dependent Claim
36 words
A process according to claim 1 in which hydrogenation is performed using a catalyst based on cobalt and nickel at a temperature from 180° C to 220° C at a pressure from 10 to 100 bars.
Claim 6
Dependent Claim
28 words
In a hydraulic system having elastomeric seals, a hydraulic oil composition comprising a major amount of paraffinic hydraulic transmission oil prepared by the process according to claim 1.
Claim 7
Dependent Claim
72 words
In a hydraulic system having elastomeric seals according to claim 5, said hydraulic oil composition comprising 80% to 99% by weight of said paraffinic oil and 20% to 1% by weight of a naphthenic oil substantially free from aromatic hydrocarbons and having a flash point greater than 100° C. and a viscosity between 10 and 100 centistokes at 37.8° C., said naphthenic oil imparting seal swelling ability to said hydraulic oil composition.
Claim 8
Dependent Claim
40 words
In a hydraulic system according to claim 6, said naphthenic oil having a viscosity between 10 and 100 centistokes at 37.8° C. and consisting essentially of cyclanic hydrocarbons containing at least three condensed rings of 5 carbon atoms per ring.
Claim 9
Dependent Claim
30 words
In a hydraulic system according to claim 6, said composition containing from 3 to 10% by weight of said naphthenic oil and wherein said elastomeric seals are of polyurethane rubber.
Claim 10
Dependent Claim
21 words
In a hydraulic system according to claim 6, said composition containing from 5 to 8% by weight of the naphthenic oil.
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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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |