US4259174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dewaxing of hydrocarbon oils
Assignee: Mobil Oil AS
•
Filing: 1979-03-19
•
Granted: 1981-03-31
•
Expires: 1999-03-19
Abstract
Abstract Hydrocarbon oils, especially 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 synthetic offretite catalyst preferably associated with a hydrogenation metal such as platinum or palladium.
Inventors
- 👤 Nai Y. Chen
- 👤 William E. Garwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:29
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/50; B01J29/505; B01J29/52; B01J29/54; C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64
Claims Analysis
Total Claims: 17
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 +25° 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 +25° F., the improvement whereby effecting said dewaxing with increased selectivity, which comprises: contacting said waxy stock and hydrogen with a catalyst comprising synthetic offretite at a pressure of about 200 to 2000 psig, a LHSV of from 0.1 to 5.0, a temperature from about 500° to about 750° F.; and recovering a dewaxed oil stock with a pour point not greater than +25° 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 +25° 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 +25° F., the improvement whereby effecting said dewaxing with increased selectivity, which comprises: contacting said waxy stock and hydrogen with a catalyst comprising synthetic offretite at a pressure of about 200 to 2000 psig, a LHSV of from 0.1 to 5.0, a temperature from about 500° to about 750° F.; and recovering a dewaxed oil stock with a pour point not greater than +25° F.
Claim 3
Dependent Claim
15 words
The process claimed in claim 1 wherein said waxy stock is a waxy solvent-refined stock.
Claim 4
Dependent Claim
27 words
The process claimed in claim 1 wherein said hydrogenation metal is selected from the group consisting of platinum, palladium, zinc, and a mixture of palladium and zinc.
Claim 5
Dependent Claim
12 words
The process claimed in claim 1 wherein said hydrogenation metal is nickel.
Claim 6
Dependent Claim
27 words
The process claimed in 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
19 words
The process claimed in claim 1 wherein said waxy stock is partially solvent dewaxed prior to said contacting step.
Claim 8
Dependent Claim
27 words
The process claimed in claim 6 wherein said hydrogenation metal is selected from the group consisting of platinum, palladium, zinc and a mixture of palladium and zinc.
Claim 9
Dependent Claim
12 words
The process claimed in claim 6 wherein said hydrogenation metal is nickel.
Claim 10
Dependent Claim
30 words
The process claimed in claim 6 or claim 7 or claim 8 wherein said contacting is effected at a temperature from about 500° to about 600° F. with fresh catalyst.
Claim 11
Dependent Claim
14 words
The process claimed in claim 3 wherein said waxy-stock is a waxy solvent-refined stock.
Claim 12
Dependent Claim
15 words
The process claimed in claim 4 wherein said waxy stock is a waxy solvent-refined stock.
Claim 13
Dependent Claim
68 words
A process for treating a hydrocarbon oil feed which comprises contacting said feed at a temperature of 500° F. to 1100° F., a LHSV of 0.2 to 50, and a pressure of 15 to 3000 psig with a catalyst comprising synthetic offretite having the X-ray diffraction pattern set forth in Table I, and recovering a hydrocarbon oil having a reduced pour point, reduced cloud point, or reduced CFPP.
Claim 14
Dependent Claim
68 words
A process for treating a hydrocarbon oil feed which comprises contacting said feed at a temperature of 500° F. to 1100° F., a LHSV of 0.2 to 50, and a pressure of 15 to 3000 psig with a catalyst comprising synthetic offretite having the X-ray diffraction pattern set forth in Table I, and recovering a hydrocarbon oil having a reduced pour point, reduced cloud point, or reduced CFPP.
Claim 15
Dependent Claim
60 words
The process described in claim 12 wherein said contacting is done in the presence of hydrogen, said offretite catalyst is composited with a hydrogenation component, and said reaction conditions include a temperature of 500° to 900° F., a pressure of 200 to 2000 psig, a LHSV of 0.2 to 30, and a hydrogen circulation rate of 500 to 20,000 SCF/bbl.
Claim 16
Dependent Claim
22 words
The process described in claim 13 wherein said hydrogenation component is selected from the group consisting of platinum, palladium, zinc, and palladium-zinc.
Claim 17
Dependent Claim
12 words
The process described in claim 13 wherein said hydrogenation component comprises nickel.
References Cited (Backward Citations)
US2817693A
Cited
CA934130A
Cited
US3474025A
Cited
US3578398A
Cited
US3764516A
Cited
US3700585A
Cited
US3755138A
Cited
USRE28398E
Cited
US3687839A
Cited
US3968024A
Cited
US4176050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |