Patent US4395327A successfully refreshed from Google Patents.
US4395327A
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Hydrotreating process
Assignee: Mobil Oil AS
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Filing: 1982-08-17
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Granted: 1983-07-26
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Expires: 2002-08-17
Abstract
Abstract Lubricating oils of improved quality are prepared by hydrotreating a lubricant base stock in the presence of a hydrotreating catalyst comprising zeolite ZSM-39 and a hydrogenation component.
Inventors
- 👤 Bruce P. Pelrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:43
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/78; B01J29/72; B01J29/76; C; C10; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
A process for producing a lubricating oil of improved properties which comprises hydrotreating a lubricating oil base stock in the presence of a hydrotreating catalyst comprising zeolite ZSM-39.
Claim 2
Dependent Claim
28 words
A process for producing a lubricating oil of improved properties which comprises hydrotreating a lubricating oil base stock in the presence of a hydrotreating catalyst comprising zeolite ZSM-39.
Claim 3
Dependent Claim
28 words
A process according to claim 1 in which the hydrotreating catalyst comprises zeolite ZSM-39 and a hydrogenation component comprising a metal component of Group VIB, VIIB or VIII.
Claim 4
Dependent Claim
21 words
A process according to claim 2 in which the metal component is selected from nickel, cobalt, molybdenum, tungsten or combinations thereof.
Claim 5
Dependent Claim
20 words
A process according to claim 1 in which the lubricating oil base stock is a dewaxed lubricating oil base stock.
Claim 6
Dependent Claim
21 words
A process according to claim 4 in which the lubricating oil base stock is a dewaxed, solvent-extracted lubricating oil base stock.
Claim 7
Dependent Claim
39 words
A process according to claim 1 in which the lubricating oil base stock is hydrotreated at a temperature of from 200° to 600° C., a pressure of at least 300 kPa and a space velocity of 0.1 to 20.
References Cited (Backward Citations)
US4211635A
Cited
US4269695A
Cited
US4259170A
Cited
US4357233A
Cited
US4292166A
Cited
US4358363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |