Patent US188771A successfully refreshed from Google Patents.
US4520221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making high VI lubes
Assignee: Mobil Oil AS
•
Filing: 1984-04-09
•
Granted: 1985-05-28
•
Expires: 2004-04-09
Abstract
Abstract High VI lubes in high yields are obtained when lower or light olefins are polymerized over a ZSM-5 type catalyst the surface acidity of which has been inactivated by treatment with a suitable base material.
Inventors
- 👤 Catherine S. Hsia Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:39
CPC Classifications
C; C10; C10G; C10G50/00; C10G50/02; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; B01J29/7007; B01J29/65
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
In a process for the production of high VI lubricating oils in high yields from lower olefins comprising contacting said olefins over a ZSM-5 type catalyst at elevated temperatures and pressures and obtaining a liquid product from which said lubricating oils are separated, wherein said catalyst is treated with a bulky alkylpyridine whereby its surface activity or acidity is removed or substantially eliminated.
Claim 2
Dependent Claim
63 words
In a process for the production of high VI lubricating oils in high yields from lower olefins comprising contacting said olefins over a ZSM-5 type catalyst at elevated temperatures and pressures and obtaining a liquid product from which said lubricating oils are separated, wherein said catalyst is treated with a bulky alkylpyridine whereby its surface activity or acidity is removed or substantially eliminated.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the olefins are selected from C 2 to C 8 olefins.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein said olefin is propylene.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said bulky alkylpyridine is 2,6-di-tert-butylpyridine.
Claim 6
Dependent Claim
35 words
The process of claim 1 wherein the zeolite is selected from the group consisting essentially of ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-35, ZSM-38, ZSM-48, ZSM-50 and similar naturally occurring materials and the hydrogen forms thereof.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the zeolite is a HZSM-5 zeolite.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the alkylpyridine has in the alkyl moiety thereof from 1 to about 8 carbon atoms.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein said bulky pyridine has an effective cross section larger than about 5 Angstroms.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the viscosity index of lubricant range hydrocarbons boiling above 650° F. is at least about 120.
Claim 11
Dependent Claim
63 words
A process for producing substantially linear hydrocarbons by polymerizing a lower olefin at elevated temperature and pressure which comprises contacting the lower olefin under polymerization conditions with a medium pore siliceous zeolite having acid cracking activity, and a constraint index of about 1 to 12; wherein said zeolite has acidic pore activity and wherein the zeolite surface is substantially inactive for acidic reactions.
Claim 12
Dependent Claim
63 words
A process for producing substantially linear hydrocarbons by polymerizing a lower olefin at elevated temperature and pressure which comprises contacting the lower olefin under polymerization conditions with a medium pore siliceous zeolite having acid cracking activity, and a constraint index of about 1 to 12; wherein said zeolite has acidic pore activity and wherein the zeolite surface is substantially inactive for acidic reactions.
Claim 13
Dependent Claim
42 words
The process of claim 10 wherein the zeolite consists essentially of aluminosilicate HZSM-5 having a silica to alumina molar ratio at least 12, the zeolite surface acidity being neutralized by a bulky amine having an effective cross section larger than 5 Angstroms.
Claim 14
Dependent Claim
22 words
The process of claim 10 wherein lubricant range hydrocarbons boiling above 650° F. have a viscosity index of at least about 120.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |