Patent US4176050A successfully refreshed from Google Patents.
US4176050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high V.I. lubricating oil stock
Assignee: Mobil Oil AS
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Filing: 1978-12-04
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Granted: 1979-11-27
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Expires: 1998-12-04
Abstract
Abstract Waxy distillate lubricating oil stocks suitable for the preparation, by conventional unit processes, of high V.I., low pour point lubricating oils, are advantageously catalytically dewaxed with macrocrystalline ZSM-5 (crystallites larger than 2 microns) preferably associated with a hydrogenation metal such as platinum or palladium.
Inventors
- 👤 Nai Y. Chen
- 👤 William E. Garwood
- 👤 Alan W. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; C; C10; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
In a process for manufacturing a refined lubricating oil stock having a V.I. of at least 85 and a pour point not greater than +20° F. from a waxy stock boiling within the range of from about 450° to about 1050° F., said process comprising catalytically dewaxing said waxy stock to a pour point not greater than +20° F., the improvement whereby effecting said dewaxing with increased selectivity, which comprises: contacting said waxy stock with a catalyst comprising macrocrystalline ZSM-5 at a LHSV of from 0.1 to 5.0, a temperature from about 500 to about 750° F., and under a total pressure greater than about 100 psia; and recovering a dewaxed oil stock with a pour point not greater than +20° F.
Claim 2
Dependent Claim
122 words
In a process for manufacturing a refined lubricating oil stock having a V.I. of at least 85 and a pour point not greater than +20° F. from a waxy stock boiling within the range of from about 450° to about 1050° F., said process comprising catalytically dewaxing said waxy stock to a pour point not greater than +20° F., the improvement whereby effecting said dewaxing with increased selectivity, which comprises: contacting said waxy stock with a catalyst comprising macrocrystalline ZSM-5 at a LHSV of from 0.1 to 5.0, a temperature from about 500 to about 750° F., and under a total pressure greater than about 100 psia; and recovering a dewaxed oil stock with a pour point not greater than +20° F.
Claim 3
Dependent Claim
26 words
The process claimed in claim 1 wherein said contacting is done in the presence of hydrogen and said macrocrystalline ZSM-5 is associated with a hydrogenation metal.
Claim 4
Dependent Claim
26 words
The process claimed in claim 2 wherein said hydrogenation metal is selected from the group consisting of platinum, palladium, or a mixture of palladium and zinc.
Claim 5
Dependent Claim
12 words
The process claimed in claim 2 wherein said hydrogenation metal is nickel.
Claim 6
Dependent Claim
30 words
The process claimed in claim 2 or claim 3 or claim 4 wherein said contacting is effected at a temperature from about 500° to about 600° F. with fresh catalyst.
Claim 7
Dependent Claim
28 words
The process claimed in claim 2 or claim 3 or claim 4 wherein a hydrocarbon partial pressure of at least 75 psia is maintained during said contacting step.
Claim 8
Dependent Claim
16 words
The process claimed in claim 2 including the step of partially solvent dewaxing said waxy stock.
Claim 9
Dependent Claim
26 words
The process claimed in claim 7 wherein said hydrogenation metal is selected from the group consisting of platinum, palladium, or a mixture of palladium and zinc.
Claim 10
Dependent Claim
12 words
The process claimed in claim 7 wherein said hydrogenation metal is nickel.
Claim 11
Dependent Claim
30 words
The process claimed in claim 7 or claim 8 or claim 9 wherein said contacting is effected at a temperature from about 500° to about 600° F. with fresh catalyst.
Claim 12
Dependent Claim
28 words
The process described in claim 7 or claim 8 or claim 9 wherein a hydrocarbon partial pressure of at least 75 psia is maintained during said contacting step.
Claim 13
Dependent Claim
15 words
The process claimed in claim 1 wherein said waxy stock is a waxy solvent-refined stock.
Claim 14
Dependent Claim
15 words
The process claimed in claim 2 wherein said waxy stock is a waxy solvent-refined stock.
Claim 15
Dependent Claim
15 words
The process claimed in claim 3 wherein said waxy stock is a waxy solvent-refined stock.
Claim 16
Dependent Claim
15 words
The process claimed in claim 4 wherein said waxy stock is a waxy solvent-refined stock.
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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |