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US4361422A
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Hydrogenation and etherification of an unsaturated C5 hydrocarbon cut to increase its octane number and decrease its mono-olefin content
Assignee: IFP Energies nouvelles
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Filing: 1981-03-10
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Granted: 1982-11-30
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Expires: 2001-03-10
Abstract
Abstract An unsaturated C5 fraction comprising at least 10% of a mixture (A) of 2-methyl-1-butene with 2-methyl-2-butene and optionally isoprene and at least 10% of a mixture (B) of other mono-olefins and diolefins is hydrogenated under controlled conditions and thereafter etherified with an alcohol having from 1 to 4 carbon atoms. A gasoline fraction of high motor octane number and low olefin content is thus obtained.
Inventors
- 👤 Michel Derrien
- 👤 Jean Cosyns
- 👤 Bernard Torck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:11
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/02; C10L1/023; C10G; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A process for producing a gasoline fraction of high motor octane number and low olefins content from a C 5 unsaturated fraction comprising at least 10% by weight of a mixture (A) comprising 2-methyl-1-butene and 2-methyl-2-butene; and at least 10% by weight of a mixture (B) comprising the C 5 monoolefins other than those of mixture (A), comprising the steps of: catalytically hydrogenating the C 5 unsaturated fraction in such a manner as to convert at least 30% of mixture (B) to saturated hydrocarbons while limiting the conversion of mixture (A) to saturated hydrocarbons to at most 10%; and etherifying at least a portion of the 2-methyl-1-butene and 2-methyl-2-butene in the resultant effluent with an aliphatic C 1-4 alcohol.
Claim 2
Dependent Claim
119 words
A process for producing a gasoline fraction of high motor octane number and low olefins content from a C 5 unsaturated fraction comprising at least 10% by weight of a mixture (A) comprising 2-methyl-1-butene and 2-methyl-2-butene; and at least 10% by weight of a mixture (B) comprising the C 5 monoolefins other than those of mixture (A), comprising the steps of: catalytically hydrogenating the C 5 unsaturated fraction in such a manner as to convert at least 30% of mixture (B) to saturated hydrocarbons while limiting the conversion of mixture (A) to saturated hydrocarbons to at most 10%; and etherifying at least a portion of the 2-methyl-1-butene and 2-methyl-2-butene in the resultant effluent with an aliphatic C 1-4 alcohol.
Claim 3
Dependent Claim
60 words
A process according to claim 1, wherein the C 5 fraction subjected to hydrogenation is a previously isolated C 5 fraction and the hydrogenation is effected at 50°-200° C., with an outlet temperature of at least 120° C., a pressure of 5-60 bars and a hourly feed rate of the liquid charge of 0.5-10 volumes per volume of hydrogenation catalyst.
Claim 4
Dependent Claim
30 words
A process according to claim 1, wherein the hydrogenation is so controlled that the conversion of mixture (A) is lower than 5% and the conversion of mixture (B) is 50-90%.
Claim 5
Dependent Claim
26 words
A process according to claim 1, wherein the hydrogenation is so controlled as to obtain an olefin concentration after etherification of at most 20% by weight.
Claim 6
Dependent Claim
24 words
A process according to claim 1, wherein the hydrogenation is so controlled as to obtain an olefin concentration after etherification of 2-10% by weight.
Claim 7
Dependent Claim
19 words
A process according to claim 1, wherein the unsaturated C 5 fraction is a C 5 catalytic cracking cut.
Claim 8
Dependent Claim
18 words
A process according to claim 1, wherein the unsaturated C 5 fraction is a C 5 steam-cracking cut.
Claim 9
Dependent Claim
71 words
A process according to claim 1, wherein the hydrogenation is effected with a gasoline feed comprising said C 5 fraction at a temperature of 50°-220° C., an outlet temperature of at least 150° C., a pressure of 5-60 bars and an hourly feed rate of the liquid charge of 0.5-10 volumes per volume of the hydrogenation catalyst; and the C 5 hydrogenated cut is separated from the hydrogenation effluent and etherified.
Claim 10
Dependent Claim
28 words
A process according to claim 1, wherein the hydrogenation is so conducted as to obtain a 15-40% by weight content of 2-methyl-1-butene and 2-methyl-2-butene in the resultant effluent.
Claim 11
Dependent Claim
46 words
A process according to claim 1, wherein the free alcohol present after etherification is left in the C 5 cut, and the resultant product comprises 40-70% of C 5 saturated hydrocarbons, 5-30% of C 5 monoolefinic hydrocarbons, 15-30% of ether and 2-10% of alcohol by weight.
Claim 12
Dependent Claim
20 words
A process according to claim 1, wherein the total conversion of 2-methyl-1-butene and 2-methyl-2-butene in the etherification step is 40-90%.
Claim 13
Dependent Claim
23 words
A process according to claim 1, wherein mixture (A) further comprise isoprene, and mixture (B) further comprises C 5 diolefins other than isoprene.
Claim 14
Dependent Claim
18 words
A process according to claim 1, wherein the hydrogenation is effected in the presence of a palladium catalyst.
Claim 15
Dependent Claim
16 words
A process according to claim 13, wherein said catalyst is 0.2-2% by weight palladium on alumina.
Claim 16
Dependent Claim
20 words
A process according to claim 1, wherein the hydrogenation is effected in the presence of a nickel on alumina catalyst.
Claim 17
Dependent Claim
15 words
A process according to claim 1, wherein the etherification is effected with methanol or ethanol.
Claim 18
Dependent Claim
11 words
A process according to claim 16, wherein the alcohol is methanol.
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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |