US4474618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overnight cloud and color in lube dewaxing using platinum zeolite catalyst
Assignee: Mobil Oil AS
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Filing: 1983-08-08
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Granted: 1984-10-02
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Expires: 2003-08-08
Abstract
Abstract A highly dispersed platinum ZSM-5 catalyst used in hydrodewaxing lube stock yields a product with improved overnight cloud performance and lighter ASTM color.
Inventors
- 👤 Jeffrey H. Yen
- 👤 Arthur W. Chester
- 👤 William E. Garwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:10
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A process for producing an improved lubricant basestock with a reduced tendency to form a haze after standing overnight at subambient temperatures, said process comprising contacting a waxy hydrocarbon fraction boiling within the approximate range of 450° F. to 1050° F. and hydrogen at dewaxing conditions with a catalyst comprising ZSM-5 crystalline aluminosilicate zeolite having contained thereon an active noble metal hydrogenation component present as a noble metal dispersion of at least about 0.50 and recovering a dewaxed oil product.
Claim 2
Dependent Claim
80 words
A process for producing an improved lubricant basestock with a reduced tendency to form a haze after standing overnight at subambient temperatures, said process comprising contacting a waxy hydrocarbon fraction boiling within the approximate range of 450° F. to 1050° F. and hydrogen at dewaxing conditions with a catalyst comprising ZSM-5 crystalline aluminosilicate zeolite having contained thereon an active noble metal hydrogenation component present as a noble metal dispersion of at least about 0.50 and recovering a dewaxed oil product.
Claim 3
Dependent Claim
40 words
The process of claim 1 wherein said dewaxing conditions include a temperature between about 500° F. and about 700° F., a pressure between about 100 and 3000 psig at a liquid hourly space velocity between about 0.1 and about 10.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said zeolite catalyst is treated with gaseous CO 2 prior to the inclusion of said noble metal.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein said noble metal comprises platinum and said zeolite catalyst contains between about 0.1 and about 25 wt.% of said platinum hydrogenation component.
Claim 6
Dependent Claim
14 words
The process of claim 4 wherein said zeolite catalyst contains about 0.2-1.0 wt.% platinum.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein said platinum dispersion is at least about 0.70.
Claim 8
Dependent Claim
22 words
The process of claim 4 wherein said platinum is impregnated into said zeolite by treating the zeolite with a platinum metal-containing ion.
Claim 9
Dependent Claim
33 words
The process of claim 7 wherein said platinum metal-containing ion is provided from suitable platinum compounds selected from the group consisting of chloroplatinic acid, platinous chloride and compounds containing a platinum amine complex.
Claim 10
Dependent Claim
13 words
The process of claim 8 wherein said platinum amine complex comprises tetraamineplatinum chloride.
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |