US4124650A
Expired / Lapsed
US
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Process for the production of low pour point synthetic oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-07-22
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Granted: 1978-11-07
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Expires: 1997-07-22
Abstract
Abstract An improved process for producing low pour point, high VI synthetic oils from feedstocks containing wax and residual olefinic unsaturation, said feedstocks having been obtained by thermal, non-catalytic polymerization of linear, C6-C20 carbon atom monoalpha-olefins. The improvement comprises simultaneously hydrogenating and catalytically dewaxing the feedstock by contacting said feedstock and hydrogen with a hydrogen form mordenite catalyst at elevated temperature and pressure, thereby producing a stable synthetic oil of high viscosity index and low pour point.
Inventors
- 👤 Christopher Olavesen
- 👤 Bruce M. Sankey
- 👤 John B. Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:32
CPC Classifications
C; C10; C10G; C10G69/00; C10G69/02; C10G69/12; C10G69/126; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
89 words
An improved process for producing low pour point synthetic oils from feedstocks containing wax and residual olefinic unsaturation, said feedstocks having been obtained by thermally and non-catalytically polymerizing a mixture of linear C 6 -C 20 carbon atom monoalpha-olefins, wherein the improvement comprises simultaneously hydrogenating and catalytically dewaxing said feedstock by contacting same and hydrogen with a catalyst comprising a hydrogen form mordenite at elevated temperature ranging from between about 450° to 950°F. and at elevated pressure, thereby producing a synthetic oil of reduced wax content and pour point.
Claim 2
Dependent Claim
89 words
An improved process for producing low pour point synthetic oils from feedstocks containing wax and residual olefinic unsaturation, said feedstocks having been obtained by thermally and non-catalytically polymerizing a mixture of linear C 6 -C 20 carbon atom monoalpha-olefins, wherein the improvement comprises simultaneously hydrogenating and catalytically dewaxing said feedstock by contacting same and hydrogen with a catalyst comprising a hydrogen form mordenite at elevated temperature ranging from between about 450° to 950°F. and at elevated pressure, thereby producing a synthetic oil of reduced wax content and pour point.
Claim 3
Dependent Claim
32 words
The process of claim 1, wherein catalyst contains one or more metal hydrogenating component selected from the group consisting of Group VI metals, Group VIII metals, their oxides, sulfides and mixtures thereof.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said feedstock boils within the range of from about 500° to 1100° F.
Claim 5
Dependent Claim
15 words
The process of claim 3, wherein said catalyst contains at least one platinum group metal.
Claim 6
Dependent Claim
33 words
The process of claim 4, wherein said metal is present on said catalyst in an amount ranging from about 0.05 to about 10.0 wt.% based on the total dry weight of the catalyst.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein said metal is platinum or palladium.
Claim 8
Dependent Claim
17 words
The process of claim 6 wherein said feedstock and product have a VI of at least 120.
Claim 9
Dependent Claim
19 words
The process of claim 7 wherein the pour point of said product is no greater than about 0° F.
Claim 10
Dependent Claim
102 words
An improved process for producing low pour point synthetic oils from feedstocks containing wax and residual unsaturation, said feedstocks having been obtained by thermal, non-catalytic polymerization of a mixture of linear C 6 -C 20 carbon atom monoalpha-olefins, wherein the improvement comprises simultaneously hydrogenating and catalytically dewaxing the feedstock by contacting same and hydrogen with a catalyst comprising a hydrogen form mordenite containing one or more metal hydrogenating components at elevated temperature and pressure ranging from about 450° to 950° F. and 100 to 5000 psig of hydrogen, respectively, to produce a stable synthetic oil of reduced wax content and pour point.
Claim 11
Dependent Claim
102 words
An improved process for producing low pour point synthetic oils from feedstocks containing wax and residual unsaturation, said feedstocks having been obtained by thermal, non-catalytic polymerization of a mixture of linear C 6 -C 20 carbon atom monoalpha-olefins, wherein the improvement comprises simultaneously hydrogenating and catalytically dewaxing the feedstock by contacting same and hydrogen with a catalyst comprising a hydrogen form mordenite containing one or more metal hydrogenating components at elevated temperature and pressure ranging from about 450° to 950° F. and 100 to 5000 psig of hydrogen, respectively, to produce a stable synthetic oil of reduced wax content and pour point.
Claim 12
Dependent Claim
29 words
The process of claim 9 wherein said metal hydrogenating component is selected from the group consisting of Group VI metals, Group VIII metals, their oxides, sulfides and mixtures thereof.
Claim 13
Dependent Claim
26 words
The process of claim 10, wherein said elevated temperature and pressure range from about 500° to 850° F. and 200 to 2500 psig of hydrogen, respectively.
Claim 14
Dependent Claim
17 words
The process of claim 11 wherein said feedstock has an initial boiling point of about 500° F.
Claim 15
Dependent Claim
18 words
The process of claim 12 wherein said feedstock has a Bromine Number ranging from about 10 to 20.
Claim 16
Dependent Claim
19 words
The process of claim 13 wherein both said feedstock and product have a VI of at least about 120.
Claim 17
Dependent Claim
35 words
The process of claim 14 wherein said metal is a platinum group metal present on said catalyst in an amount ranging from 0.05 to 10.0 wt.% based on the total dry weight of the catalyst.
Claim 18
Dependent Claim
26 words
The process of claim 15, wherein said feedstock is obtained by thermally and non-catalytically polymerizing a mixture of linear C 10 -C 14 carbon atom monoalpha-olefins.
Claim 19
Dependent Claim
17 words
The process of claim 16 wherein said feedstock boils within the range of 500° to 1100° F.
Claim 20
Dependent Claim
17 words
The process of claim 17 wherein the pour point of said product is below about 0° F.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |