US4658079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of lubricant range hydrocarbons from light olefins
Assignee: Mobil Oil AS
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Filing: 1985-12-16
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Granted: 1987-04-14
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Expires: 2005-12-16
Abstract
Abstract High VI lube oils are obtained in high yields when lower olefins are polymerized over an aluminosilicate HZSM-5 type catalyst or zeolite beta whose surface Brönsted acid sites have been inactivated with a sterically hindered basic organophosphorus compound.
Inventors
- 👤 Catherine S. H. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:34
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; B01J29/7007; C; C10; C10G; C10G50/00; C10G50/02; B01J29/65
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A process for producing substantially linear hydrocarbons by oligomerizing a lower olefin at elevated temperature and pressure which comprises contacting the lower olefin under polymerization conditions with a medium or large pore siliceous zeolite having Bronsted acid activity and a constraint index of about 0.5 to 12; wherein said zeolite has acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions, said zeolite surface being neutralized by a bulky organo-phosphorus compound having an effective cross section larger than the zeolite pore.
Claim 2
Dependent Claim
86 words
A process for producing substantially linear hydrocarbons by oligomerizing a lower olefin at elevated temperature and pressure which comprises contacting the lower olefin under polymerization conditions with a medium or large pore siliceous zeolite having Bronsted acid activity and a constraint index of about 0.5 to 12; wherein said zeolite has acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions, said zeolite surface being neutralized by a bulky organo-phosphorus compound having an effective cross section larger than the zeolite pore.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the zeolite consists essentially of aluminosilicate HZSM-5 or aluminosilicate zeolite beta, said aluminosilicates having a silica to alumina molar ratio of at least 12.
Claim 4
Dependent Claim
76 words
A process for producing heavier hydrocarbons by oligomerizing lower olefin feed at elevated temperature and pressure which comprises contacting the lower olefin under oligomerization conditions with a medium or large pore shape-selective siliceous zeolite catalyst having acid cracking activity, and a constraint index of about 0.5 to 12, wherein said zeolite has internal acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions by chemisorption of a basic organophosphorus deactivating agent.
Claim 5
Dependent Claim
76 words
A process for producing heavier hydrocarbons by oligomerizing lower olefin feed at elevated temperature and pressure which comprises contacting the lower olefin under oligomerization conditions with a medium or large pore shape-selective siliceous zeolite catalyst having acid cracking activity, and a constraint index of about 0.5 to 12, wherein said zeolite has internal acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions by chemisorption of a basic organophosphorus deactivating agent.
Claim 6
Dependent Claim
53 words
The process of claim 3 wherein the zeolite consists essentially of aluminosilicate HZSM-5 or aluminosilicate zeolite beta, said aluminosilicates having a silica to alumina molar ratio of at least 12, the zeolite surface acidity being neutralized by a sterically-hindered phosphine or phosphonium compound having an effective cross section larger than the zeolite pore.
Claim 7
Dependent Claim
23 words
The process of claim 4 wherein the sterically-hindered phosphine or phosphonium compound is triphenylphosphine, butyltriphenylphosphonium bromide, tetraphenylphosphonium bromide, tetrabutylphosphonium bromide, or tetraethylphosphonium chloride.
Claim 8
Dependent Claim
115 words
A multi-stage process for producing high viscosity index lubricating oils from lower olefin feed which comprises contacting the lower olefins under conditions of high temperature and pressure with a medium pore shape-selective siliceous zeolite catalyst having Bronsted acid activity, and a constraint index of about 0.5 to 12; wherein said zeolite has acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions, said zeolite surface being neutralized by a bulky organo-phosphorus compound having an effective cross section larger than the zeolite pore; and contacting at least a portion of the primary stage effluent in a second reaction zone with an acid catalyst to effectively polymerize the C 10 + hydrocarbons.
Claim 9
Dependent Claim
115 words
A multi-stage process for producing high viscosity index lubricating oils from lower olefin feed which comprises contacting the lower olefins under conditions of high temperature and pressure with a medium pore shape-selective siliceous zeolite catalyst having Bronsted acid activity, and a constraint index of about 0.5 to 12; wherein said zeolite has acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions, said zeolite surface being neutralized by a bulky organo-phosphorus compound having an effective cross section larger than the zeolite pore; and contacting at least a portion of the primary stage effluent in a second reaction zone with an acid catalyst to effectively polymerize the C 10 + hydrocarbons.
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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |