US4855527A
Expired / Lapsed
US
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Olefin oligomerization with surface modified zeolite
Assignee: Mobil Oil AS
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Filing: 1989-01-13
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Granted: 1989-08-08
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Expires: 2009-01-13
Abstract
Abstract A process for producing substantially linear hydrocarbons by oligomerizing a lower olefin at elevated temperature and pressure which comprises contacting the lower olefin under oligomerization/polymerization conditions with siliceous acidic ZSM-23 zeolite having Bronsted acid activity; wherein the zeolite has acidic pore activity and wherein the zeolite surface is rendered substantially inactive for acidic reactions. The zeolite surface can be neutralized by a bulky pyridine compound having an effective cross-section larger than the zeolite pore. The preferred deactivating agent is 2,4,6-collidine, which may be applied to the zeolite as a pretreatment or added with olefin feed in a continuous process.
Inventors
- 👤 Nancy M. Page
- 👤 Lewis B. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
C; C07; C07C; C07C309/00; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18; B01J29/70; C07C11/00; C07C11/02; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/12; C07C2/54; C07C2/64; C07C2/66; C10; C10G; C10G29/00; C10G29/20; C10G29/28; B01J2229/00; B01J2229/10; B01J2229/12; B01J2229/123; B01J2229/16; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/37; B01J2229/38; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 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 siliceous acidic ZSM-23 zeolite having Bronsted acid activity; 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 contacting HZSM-23 with 2,4,6-collidine.
Claim 2
Dependent Claim
64 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 siliceous acidic ZSM-23 zeolite having Bronsted acid activity; 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 contacting HZSM-23 with 2,4,6-collidine.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the zeolite is an aluminosilicate having a silica-to-alumina molar ratio of at least 12.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein said olefin comprises C 3 to C 6 lower olefin.
Claim 5
Dependent Claim
107 words
A multi-stage process for producing high viscosity index lubricating oils from lower olefin feed which comprises contacting the lower olefins in a primary reaction zone under conditions of elevated temperature and pressure with a siliceous ZSM-23 zeolite catalyst having Bronsted acid activity; 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 contacting HZSM-23 with 2,4,6-collidine, thereby producing substantially linear C 10 + olefins; and contacting at least a portion of the primary stage effluent in a secondary reaction zone with an acid catalyst to effectively polymerize the C 10 + hydrocarbons.
Claim 6
Dependent Claim
107 words
A multi-stage process for producing high viscosity index lubricating oils from lower olefin feed which comprises contacting the lower olefins in a primary reaction zone under conditions of elevated temperature and pressure with a siliceous ZSM-23 zeolite catalyst having Bronsted acid activity; 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 contacting HZSM-23 with 2,4,6-collidine, thereby producing substantially linear C 10 + olefins; and contacting at least a portion of the primary stage effluent in a secondary reaction zone with an acid catalyst to effectively polymerize the C 10 + hydrocarbons.
Claim 7
Dependent Claim
24 words
The process of claim 4 wherein the zeolite catalyst contains ZSM-23 having an alpha value of about 10 to 300 prior to surface neutralization.
Claim 8
Dependent Claim
20 words
The process of claim 4 wherein the acid catalyst in the secondary reaction zone comprises BF 3 and phosphoric acid.
Claim 9
Dependent Claim
33 words
The process of claim 4 wherein the lower olefin feed consists essentially of C 3 to C 6 olefin and the primary stage effluent comprises substantially linear C 10 to C 20 olefins.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |