US4211640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of olefinic gasoline
Assignee: Mobil Oil AS
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Filing: 1979-05-24
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Granted: 1980-07-08
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Expires: 1999-05-24
Abstract
Abstract A process is disclosed for the treatment of highly olefinic gasoline containing at least about 50% by weight of olefins by contacting said olefinic gasoline with a special group of acidic crystalline aluminosilicate zeolites, such as those of the ZSM-5 type in order to enhance the gum stability of said gasoline and produce products comprising both gasoline and fuel oil.
Inventors
- 👤 William E. Garwood
- 👤 Wooyoung Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:08
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C; C10; C10G; C10G29/00; C10G29/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
In the process of contacting olefinic gasoline with an acidic crystalline aluminosilicate zeolite having a pore diameter greater than about 5 Angstroms, a silica-to-alumina ratio of at least 12, and a constraint index within the range of 1-12 at elevated temperatures, the improvement which comprises utilizing an olefinic gasoline having an olefin content of at least 50 weight percent and (a) carrying out said contact at a temperature of from about 350°-600° F., a pressure of from about 100-1,000 psig and at a space velocity ranging from about 0.2 to 10 LHSV; (b) said temperature, space velocity and pressure being chosen so as to produce no more than 5 weight percent of aromatics, and (c) obtaining a product comprising both fuel oil and gasoline having enhanced gum stability.
Claim 2
Dependent Claim
128 words
In the process of contacting olefinic gasoline with an acidic crystalline aluminosilicate zeolite having a pore diameter greater than about 5 Angstroms, a silica-to-alumina ratio of at least 12, and a constraint index within the range of 1-12 at elevated temperatures, the improvement which comprises utilizing an olefinic gasoline having an olefin content of at least 50 weight percent and (a) carrying out said contact at a temperature of from about 350°-600° F., a pressure of from about 100-1,000 psig and at a space velocity ranging from about 0.2 to 10 LHSV; (b) said temperature, space velocity and pressure being chosen so as to produce no more than 5 weight percent of aromatics, and (c) obtaining a product comprising both fuel oil and gasoline having enhanced gum stability.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the aromatics produced are less than 5 weight percent.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the C 6 +liquid fraction of the product is no more than 5 volume percent less than the C 6 +liquid fraction of said olefinic gasoline charge.
Claim 5
Dependent Claim
33 words
The process of claim 2 wherein the C 6 +liquid fraction of the product is no more than 5 volume percent less than the C 6 +liquid fraction of said olefinic gasoline charge.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein a ZSM-5 type zeolite is used.
Claim 7
Dependent Claim
12 words
The process of claim 2 wherein a ZSM-5 type zeolite is used.
Claim 8
Dependent Claim
12 words
The process of claim 3 wherein a ZSM-5 type zeolite is used.
Claim 9
Dependent Claim
12 words
The process of claim 4 wherein a ZSM-5 type zeolite is used.
Claim 10
Dependent Claim
10 words
The process of claim 5 wherein the zeolite is ZSM-5.
Claim 11
Dependent Claim
10 words
The process of claim 6 wherein the zeolite is ZSM-5.
Claim 12
Dependent Claim
10 words
The process of claim 7 wherein the zeolite is ZSM-5.
Claim 13
Dependent Claim
10 words
The process of claim 8 wherein the zeolite is ZSM-5.
Claim 14
Dependent Claim
10 words
The process of claim 5 wherein the zeolite is ZSM-11.
Claim 15
Dependent Claim
10 words
The process of claim 6 wherein the zeolite is ZSM-11.
Claim 16
Dependent Claim
10 words
The process of claim 7 wherein the zeolite is ZSM-11.
Claim 17
Dependent Claim
10 words
The process of claim 8 wherein the zeolite is ZSM-11.
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) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |