EP0043681A1
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EP
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Catalytic process for manufacture of lubricating oils
Assignee: Mobil Oil AS
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Filing: 1981-06-26
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Granted: —
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Expires: 2001-06-26
Abstract
Abstract This invention describes a process for preparing a high viscosity index low pour point lube base stock from an asphalt-free heavy hydrocarbon oil by first catalytically dewaxing the heavy oil with a catalyst comprising a zeolite having a Constraint Index of 1 to 12 and then hydrocracking or hydroconverting the dewaxed oil with a large pore zeolite catalyst such as dealuminized Y or ZSM-20 associated with palladium. The viscosity index is controlled by the severity of the hydroconversion step.
Inventors
- 👤 Robert Lee Gorring
- 👤 Rene Bernard Lapierre
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:25
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C10G45/54; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
Process for preparing a low pour point, high viscosity index lube basestock which comprises contacting a waxy hydrocarbon oil feedstock boiling above 343°C (650°F) and substantially free of asphalt with hydrogen and a dewaxing catalyst comprising a zeolite having a Constraint Index of 1 to 12 under conditions effective to reduce the pour point of the 343°C (650°F) fraction of the feedstock to less than -9°C (+15°F), contacting the dewaxed feedstock and hydrogen with a large pore hydrocracking or hydroconversion catalyst under conditions effective to increase the viscosity index of the lube oil fraction of the dewaxed oil and recovering the high viscosity index lube base stock having a pour point not higher than -4°C (+25°F).
Claim 2
Dependent Claim
116 words
Process for preparing a low pour point, high viscosity index lube basestock which comprises contacting a waxy hydrocarbon oil feedstock boiling above 343°C (650°F) and substantially free of asphalt with hydrogen and a dewaxing catalyst comprising a zeolite having a Constraint Index of 1 to 12 under conditions effective to reduce the pour point of the 343°C (650°F) fraction of the feedstock to less than -9°C (+15°F), contacting the dewaxed feedstock and hydrogen with a large pore hydrocracking or hydroconversion catalyst under conditions effective to increase the viscosity index of the lube oil fraction of the dewaxed oil and recovering the high viscosity index lube base stock having a pour point not higher than -4°C (+25°F).
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the zeolite having a Constraint Index of 1 to 12 has a silica to alumina ratio above 12.
Claim 4
Dependent Claim
22 words
The process of claim 1 or 2 wherein the zeolte having a Constraint Index of 1 to 12 is ZSM-5 or ZSM-11.
Claim 5
Dependent Claim
29 words
The process of any one of claims 1 to 3 wherein the dewaxing catalyst comprises a zeolite having a Constraint Index of 1 to 12 and a hydrogenation component.
Claim 6
Dependent Claim
42 words
The process of any one of claims 1 to 4 wherein the feedstock and hydrogen are contacted with the dewaxing catalyst at a temperature of 204°-537°C (400-1000°F), a pressure of 3549-24233 kPa (500-3500 psig) and an LHSV of 0.1 to 10 hr-l.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the contacting temperature is 232-454°C (450-850°F).
Claim 8
Dependent Claim
34 words
The process of any one of claims 1 to 6 wherein the hydrocracking or hydroconversion catalyst comprises a platinum group metal and a zeolite having a silica to alumina ratio of at least 6.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the zeolite is dealuminized Y or ZSM-20.
Claim 10
Dependent Claim
45 words
The process of any one of claims 1 to 8 wherein the dewaxed feedstock and hydrogen are contacted with the hydrocracking or hydroconversion catalyust at a temperature of 204-537°C (400-1000°F), a pressure of 3549-24233 kPa (500-3500 psig) and at an LHSV of 0.1 to 10.
Claim 11
Dependent Claim
15 words
The process of claim 9 wherein the pressure is 5272-13890 kPa (750 to 2000 psig).
Claim 12
Dependent Claim
17 words
The process of any one of claims 7 to 10 wherein the platinum group metal is palladium.
Claim 13
Dependent Claim
37 words
The process of any one of claims 1 to 11 wherein the dewaxed feedstock is hydrotreated to reduce its organic nitrogen content to less than about 200 ppm prior to contact with the hydrocracking or hydroconversion catalyst.
Claim 14
Dependent Claim
18 words
The process of any one of claims 1 to 12 wherein the feedstock is a vacuum gas oil.
References Cited (Backward Citations)
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