Patent US4788375A successfully refreshed from Google Patents.
US4788375A
Expired / Lapsed
US
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Olefin conversion to lubricant range hydrocarbons
Assignee: Mobil Oil AS
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Filing: 1987-11-27
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Granted: 1988-11-29
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Expires: 2007-11-27
Abstract
Abstract An improved process for the production of a high viscosity index lubricant range oil in high yield by contacting light olefins under oligomerizing conditions with a zeolite type catalyst, such as ZSM-5, which has been extracted with a metal chelating agent to remove a portion of framework metal oxide.
Inventors
- 👤 William E. Garwood
- 👤 Guenter G. Kuehl
- 👤 Rene B. LaPierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:19
CPC Classifications
C; C10; C10G; C10G50/00; C10G50/02; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/12; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
96 words
In the process of converting light olefins to lubricant range hydrocarbons comprising contacting such at high pressure and elevated temperature with a medium pore size shape selective metallosilicate zeolite catalyst having Bronsted acid activity, to produce a C 20 + hydrocarbon fraction comprising a major portion of 343° C.+ lubricant range hydrocarbons, the improvement comprising, contacting said light olefins with said metallosilicate zeolite catalyst, said catalyst having been extracted with a metal chelating agent, whereby 343+° C. lubricant range hydrocarbons are produced having a viscosity index of at least 80 with yields of at least 40%.
Claim 2
Dependent Claim
96 words
In the process of converting light olefins to lubricant range hydrocarbons comprising contacting such at high pressure and elevated temperature with a medium pore size shape selective metallosilicate zeolite catalyst having Bronsted acid activity, to produce a C 20 + hydrocarbon fraction comprising a major portion of 343° C.+ lubricant range hydrocarbons, the improvement comprising, contacting said light olefins with said metallosilicate zeolite catalyst, said catalyst having been extracted with a metal chelating agent, whereby 343+° C. lubricant range hydrocarbons are produced having a viscosity index of at least 80 with yields of at least 40%.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said zeolite consists essentially of acidic aluminosilicate having a constrain index of about 1 to 12 and a silica to alumina mole ratio of about 20 to 100.
Claim 4
Dependent Claim
37 words
The process of claim 1 wherein said metallosilicate zeolite catalyst has a post-extraction Al 2 O 3 content of about 3.5 wt. % based on a pre-extraction Al 2 O 3 content of about 4.5 wt. %.
Claim 5
Dependent Claim
37 words
The process of claim 1 wherein said zeolite catalyst is extracted with an aluminum chelating agent taken from the group consisting essentially of ethylenediaminetetraacetic acid (EDTA), the dialkali salt of EDTA, ethylenediamine, glycine, 2,4-pentanedione, and nitriloacetic acid.
Claim 6
Dependent Claim
104 words
An improved process for the conversion of light olefins to C 20 + lubricant range hydrocarbons in high yield, comprising: providing an acidic medium pore size, shape selective aluminosilicate zeolite type catalyst having the structure of ZSM-5, said catalyst having been extracted with an aluminum chelating agent; contacting a light olefins feedstream with said catalyst in a fixed bed reactor under oligomerizing conditions to produce an effluent stream comprising a major portion of C 20 + hydrocarbons; separating a 343° C+ fraction of said effluent stream to provide lubricant range hydrocarbons with viscosity index of at least 80 and yield of at least 40%.
Claim 7
Dependent Claim
104 words
An improved process for the conversion of light olefins to C 20 + lubricant range hydrocarbons in high yield, comprising: providing an acidic medium pore size, shape selective aluminosilicate zeolite type catalyst having the structure of ZSM-5, said catalyst having been extracted with an aluminum chelating agent; contacting a light olefins feedstream with said catalyst in a fixed bed reactor under oligomerizing conditions to produce an effluent stream comprising a major portion of C 20 + hydrocarbons; separating a 343° C+ fraction of said effluent stream to provide lubricant range hydrocarbons with viscosity index of at least 80 and yield of at least 40%.
Claim 8
Dependent Claim
24 words
The process of claim 5 further comprising the step of hydrogenating said lubricant range hydrocarbons to provide stabilized lubricant oil of high viscosity index.
Claim 9
Dependent Claim
29 words
The process of claim 5 wherein said oligomerizing conditions comprise pressure between 0.27 and 3.36 kPA, temperature between 177° C. and 343° C., and WHSV between 0.1 and 1.0.
Claim 10
Dependent Claim
25 words
The process of claim 5 wherein said oligomerizing conditions comprise pressure of about 1.0 kPA, temperature of about 200° C., and WHSV of about 0.5.
Claim 11
Dependent Claim
37 words
The process of claim 5 wherein said zeolite catalyst is extracted witb an aluminum chelating agent taken from the group consisting essentially of ethylenediaminetetraacetic acid (EDTA), the dialkali salt of EDTA, ethylenediamine, glycine, 2,4-pentanedione and nitriloacetic acid.
Claim 12
Dependent Claim
14 words
The process of claim 5 wherein said zeolite type catalyst is extracted with EDTA.
Claim 13
Dependent Claim
17 words
The process of claim 5 wherein the light olefins feedstream comprises C 3 to C 9 olefins.
Claim 14
Dependent Claim
16 words
The process of claim 5 wherein the light olefins feedstream consists essentially of propylene and/or butene.
Claim 15
Dependent Claim
28 words
The process of claim 5 wherein said catalyst has a constrain index of about 1 to 12 and a silica to alumina mole ratio greater than about 20.
Claim 16
Dependent Claim
38 words
The process of claim 5 wherein the framework Al 2 O 3 content of said extracted aluminosilicate zeolite catalyst is about 3.5 wt. % based on unextracted catalyst Al 2 O 3 content of about 4.5 wt. %.
Claim 17
Dependent Claim
11 words
The process of claim 5 wherein said aluminosilicate catalyst is ZSM-5.
Claim 18
Dependent Claim
26 words
The process of claim 15 wherein said ZSM-5 catalyst has a crystallite size of 0.2 to 0.05 microns prior to extraction with said aluminum chelating agent.
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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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |