US4472266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodewaxing with Mo, Ni-Mo, or Co-Mo on Zsm-5 type catalysts
Assignee: Mobil Oil AS
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Filing: 1982-09-27
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Granted: 1984-09-18
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Expires: 2002-09-27
Abstract
Abstract A high quality lube base stock oil of low pour point and excellent stability is produced from a waxy crude oil fraction in a single-stage hydrodewaxing process by using an improved ZSM-5 type catalyst having nickel-molybdenum, cobalt-molybdenum or a molybdenum hydrogenation agent incorporated thereon.
Inventors
- 👤 Stephen M. Oleck
- 👤 Robert C. Wilson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/48; C; C10; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
In the process for hydrodewaxing a waxy lube stock having a high pour point wherein said waxy lube stock is contacted under reaction conditions in a single stage with a hydrodewaxing catalyst comprising as the sole zealite an aluminosilicate zeolite of the ZSM-5 type having a silica/alumina ratio of at least about 12 and a constraint index of 1 to about 12 the improvement which comprises reducing the pour point of said waxy lube stock to not greater than +20° F. and increasing the viscosity index of said waxy lube stock relative to the pour point obtained by incorporating onto said catalyst a hydrogenation component comprising molybdenum, cobalt-molybdenum or nickel-molybdenum, said hydrogenation component being present in an amount ranging from about 3 to 20 weight percent based on the total catalyst.
Claim 2
Dependent Claim
131 words
In the process for hydrodewaxing a waxy lube stock having a high pour point wherein said waxy lube stock is contacted under reaction conditions in a single stage with a hydrodewaxing catalyst comprising as the sole zealite an aluminosilicate zeolite of the ZSM-5 type having a silica/alumina ratio of at least about 12 and a constraint index of 1 to about 12 the improvement which comprises reducing the pour point of said waxy lube stock to not greater than +20° F. and increasing the viscosity index of said waxy lube stock relative to the pour point obtained by incorporating onto said catalyst a hydrogenation component comprising molybdenum, cobalt-molybdenum or nickel-molybdenum, said hydrogenation component being present in an amount ranging from about 3 to 20 weight percent based on the total catalyst.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said waxy lube stock is contacted with said catalyst at a temperature of about 500° F. to about 675° F.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein said catalyst comprises an aluminosilicate zeolite having a crystal framework density of not less than 1.6 grams per cubic centimeter.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said catalyst is ZSM-5 containing nickel-molybdenum.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said catalyst is ZSM-5 containing molybdenum.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said catalyst is ZSM-5 containing cobalt-molybdenum.
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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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |