Patent US3671423A successfully refreshed from Google Patents.
US3671423A
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Stabilizing hydrocracked lubricating oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-03-16
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Granted: 1972-06-20
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Expires: 1990-03-16
Abstract
Abstract The instability of lubricating oils to light and air formed by hydrocracking high boiling fractions is removed by percolating the oil through silica-alumina gels containing a Y-type molecular sieve.
Inventors
- 👤 John M Macdonald
- 👤 Ian D Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:05
CPC Classifications
C; C10; C10G; C10G47/00; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
33 words
The process of claim 1 in which the hydrocracking step takes place at a temperature between 700* and 900* F., at a pressure above 1,500 psig and a space velocity below 1 V/V/Hr.
Claim 2
Dependent Claim
29 words
The process of claim 1 in which said Y-zeolite is faujasite having a silica/alumina mole ratio greater than 3/1 and uniform pore openings of about 6 to 15 A.
Claim 3
Dependent Claim
36 words
The process of claim 2 in which said hydrocracking catalyst is an oxide or sulfide of a metal chosen from the group consisting of Group VB, VIB and VIII of the Periodic System and mixtures thereof.
Claim 4
Dependent Claim
69 words
A process of forming a lubricating oil fraction resistant to deterioration upon exposure to light and air which comprises contacting a hydrocarbon fraction, at hydrocracking conditions, with a hydrocracking catalyst to form a plurality of fractions including lubricating oil fractions, percolating said lubricating oil fractions at temperature below 150* F. with a catalyst comprising silica-alumina gel matrix containing Y-zeolite and recovering a light and air stable lubricating oil fraction.
Claim 5
Dependent Claim
38 words
The process of claim 5 in which said silica-alumina gel matrix containing Y-zeolite is a physically combined mixture of an amorphous cracking catalyst containing a major amount of silica and a minor amount of alumina and said Y-zeolite.
Claim 6
Dependent Claim
30 words
The process of claim 5 in which said Y-zeolite is faujasite having a silica-alumina mole ratio greater than about 3/1 and uniform pore openings of about 6 to 15 A.
Claim 7
Dependent Claim
41 words
The process of claim 5 in which said silica-alumina gel matrix containing Y-zeolite consists of 95 wt. percent of a mixture of Al2O3/SiO2, in the proportion of 13 wt. % Al2O3 and 87 wt. % SiO2, with 5 wt. percent faujasite.
Claim 8
Dependent Claim
18 words
The process of claim 5 wherein said silica-alumina gel matrix containing Y-zeolite is regenerated by washing with benzene.
Claim 9
Dependent Claim
22 words
The process of claim 5 wherein said lubricating oil fractions are dewaxed prior to contact with said silica-alumina gel matrix containing Y-zeolite.
Claim 10
Dependent Claim
85 words
A process for forming a stabilized lubricating oil fraction resistant to deterioration upon exposure to light and air comprising subjecting a high boiling hydrocarbon fraction to hydrocracking conditions in the presence of a hydrocracking catalyst to form a plurality of fractions including lubricating oil fractions boiling above about 650* F., dewaxing said lubricating oil fractions, percolating at least a portion of said dewaxed lubricating oil fractions through a catalyst comprising silica-alumina gel matrix containing Y-zeolite and recovering a light and air stable lubricating oil fraction.
Claim 11
Dependent Claim
38 words
The process of claim 11 in which said silica-alumina gel matrix containing Y-zeolite is a physically combined mixture of an amorphous cracking catalyst containing a major amount of silica and a minor amount of alumina and said Y-zeolite.
Claim 12
Dependent Claim
30 words
The process of claim 11 in which said Y-zeolite is faujasite having a silica-alumina mole ratio greater than about 3/1 and uniform pore openings of about 6 to 15 A.
Claim 13
Dependent Claim
41 words
The process of claim 11 in which said silica-alumina gel matrix containing Y-zeolite consists of 95 wt. percent of a mixture of Al2O3/SiO2, in the proportion of 13 wt. % Al2O3 and 87 wt. % SiO2 with 5 wt. percent faujasite.
Claim 14
Dependent Claim
18 words
The process of claim 11 wherein said silica-alumina gel matrix containing Y-zeolite is regenerated by washing with benzene.
Claim 15
Dependent Claim
18 words
The process of claim 11 wherein said percolation is conducted at a temperature less than about 150* F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |