US4229282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dewaxing of hydrocarbon oils
Assignee: Mobil Oil AS
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Filing: 1979-04-27
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Granted: 1980-10-21
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Expires: 1999-04-27
Abstract
Abstract An improved process for catalytically dewaxing a hydrocarbon oil is disclosed. In this process the waxy oil is contacted in the presence of hydrogen with a dense zeolitic dewaxing catalyst associated with a nickel-tungsten hydrogenation component. The dewaxed oil has unexpectedly good stability and a low bromine number compared with prior-art processed oils. The process may be used to dewax crude oils, fuel oil fractions and lubricating oils.
Inventors
- 👤 Alan W. Peters
- 👤 Emmerson Bowes
- 👤 Thomas R. Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:46
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/48
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
96 words
A process for dewaxing a hydrocarbon oil boiling above 350° F. which comprises contacting said oil and H 2 gas at a temperature of about 450° to 950° F., a pressure of 50 to 3000 psig, a space velocity of 0.1 to 20 LHSV, and an H 2 circulation rate of 500 to 20,000 SCF/bbl, with a catalyst comprising a nickel-tungsten hydrogenation component and a crystalline zeolite having an effective pore diameter greater than 5 Angstroms and a crystal framework density, in the dry hydrogen form, of not less than about 1.6 grams per cubic centimeter.
Claim 2
Dependent Claim
96 words
A process for dewaxing a hydrocarbon oil boiling above 350° F. which comprises contacting said oil and H 2 gas at a temperature of about 450° to 950° F., a pressure of 50 to 3000 psig, a space velocity of 0.1 to 20 LHSV, and an H 2 circulation rate of 500 to 20,000 SCF/bbl, with a catalyst comprising a nickel-tungsten hydrogenation component and a crystalline zeolite having an effective pore diameter greater than 5 Angstroms and a crystal framework density, in the dry hydrogen form, of not less than about 1.6 grams per cubic centimeter.
Claim 3
Dependent Claim
40 words
The process claimed in claim 1 wherein said hydrogenation component consists of about 0.7 to about 7 wt.% nickel and about 2.1 to about 21 wt.% tungsten expressed as metal based on said catalyst, and said crystalline zeolite is ZSM-5.
Claim 4
Dependent Claim
17 words
The process described in claim 2 wherein said said crystalline zeolite is contained in an alumina matrix.
Claim 5
Dependent Claim
22 words
The process described in claim 3 wherein said crystalline zeolite is ZSM-5 having a crystallite size of less than about 0.05 microns.
Claim 6
Dependent Claim
23 words
The process described in claim 1 or claim 2 or claim 3 or claim 4 wherein said hydrocarbon oil is a petroleum distillate.
Claim 7
Dependent Claim
155 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 dewaxed oil having good stability is formed, which comprises: contacting said waxy stock and H 2 gas with a catalyst comprising a nickel-tungsten hydrogenation component and a crystalline zeolite having a silica to alumina ratio of at least 12 and a Constraint Index of 1 to 12, said contacting being at a LHSV of from 0.1 to 5.0, a temperature from about 500° to about 750° F., and an H 2 circulation rate of 500 to 20,000 SCF/bbl; and recovering a dewaxed oil stock with a pour point not greater than +25° F.
Claim 8
Dependent Claim
155 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 dewaxed oil having good stability is formed, which comprises: contacting said waxy stock and H 2 gas with a catalyst comprising a nickel-tungsten hydrogenation component and a crystalline zeolite having a silica to alumina ratio of at least 12 and a Constraint Index of 1 to 12, said contacting being at a LHSV of from 0.1 to 5.0, a temperature from about 500° to about 750° F., and an H 2 circulation rate of 500 to 20,000 SCF/bbl; and recovering a dewaxed oil stock with a pour point not greater than +25° F.
Claim 9
Dependent Claim
40 words
The process claimed in claim 6 wherein said hydrogenation component consists of about 0.7 to about 7 wt.% nickel and about 2.1 to about 21 wt.% tungsten expressed as metal based on said catalyst, and said crystalline zeolite is ZSM-5.
Claim 10
Dependent Claim
20 words
The process claimed in claim 6 wherein said hydrogenation component and said crystalline zeolite are contained in an alumina matrix.
Claim 11
Dependent Claim
19 words
The process claimed in claim 6 wherein said waxy stock is partially solvent dewaxed prior to said contacting step.
Claim 12
Dependent Claim
19 words
The process claimed in claim 7 wherein said waxy stock is partially solvent dewaxed prior to said contacting step.
Claim 13
Dependent Claim
15 words
The process claimed in claim 6 wherein said waxy stock is a waxy solvent-refined stock.
Claim 14
Dependent Claim
15 words
The process claimed in claim 7 wherein said waxy stock is a waxy solvent-refined stock.
Claim 15
Dependent Claim
15 words
The process claimed in claim 8 wherein said waxy stock is a waxy solvent-refined stock.
Claim 16
Dependent Claim
17 words
The process claimed in claim 10 wherein said waxy stock is solvent-refined prior to said dewaxing steps.
Claim 17
Dependent Claim
14 words
The process claimed in claim 2 wherein said hydrocarbon oil is a bright stock.
Claim 18
Dependent Claim
20 words
The process claimed in claim 7 wherein said hydrogenation component and said crystalline zeolite are contained in an alumina matrix.
Claim 19
Dependent Claim
15 words
The process claimed in claim 16 wherein said waxy stock is a waxy solvent-refined stock.
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |