Patent US4227992A successfully refreshed from Google Patents.
US4227992A
Expired / Lapsed
US
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Process for separating ethylene from light olefin mixtures while producing both gasoline and fuel oil
Assignee: Mobil Oil AS
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Filing: 1979-05-24
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Granted: 1980-10-14
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Expires: 1999-05-24
Abstract
Abstract A process is disclosed for separating ethylene in admixture with light olefins by contacting said olefinic mixture under very critical reaction conditions over a special catalyst, such as a zeolite of the ZSM-5 type so as to selectively react the C3 and higher olefins and convert the same to both gasoline and fuel oil.
Inventors
- 👤 William E. Garwood
- 👤 Wooyoung Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:48
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C07; C07C; C07C7/00; C07C7/148; C10G29/00; C10G29/16; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
In the process of contacting mixtures of C 2 -C 5 olefins 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 (a) carrying out said contact at a temperature of from about 300°-600° F., a pressure of from about 100-1,000 psig and at a space velocity with regard to C 3 and higher olefins ranging from about 0.1 to 10 WHSV; (b) said temperature, space velocity and pressure being chosen so as to convert at least 80% of the C 3 and higher olefins and no more than about 20 weight percent of said ethylene; (c) obtaining a product comprising both fuel oil and gasoline; and (d) recovering ethylene by flashing it off the higher boiling product.
Claim 2
Dependent Claim
146 words
In the process of contacting mixtures of C 2 -C 5 olefins 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 (a) carrying out said contact at a temperature of from about 300°-600° F., a pressure of from about 100-1,000 psig and at a space velocity with regard to C 3 and higher olefins ranging from about 0.1 to 10 WHSV; (b) said temperature, space velocity and pressure being chosen so as to convert at least 80% of the C 3 and higher olefins and no more than about 20 weight percent of said ethylene; (c) obtaining a product comprising both fuel oil and gasoline; and (d) recovering ethylene by flashing it off the higher boiling product.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein at least 90 weight percent of the C 3 and higher olefins are converted.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein no more than about 10 weight percent ethylene is converted.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein ethylene comprises at least 10 weight percent of the olefin mixture.
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein the olefins are substantially a mixture of ethylene and propylene.
Claim 7
Dependent Claim
12 words
The process of claim 4 wherein a ZSM-5 type zeolite is used.
Claim 8
Dependent Claim
10 words
The process of claim 6 wherein the zeolite is ZSM-5.
Claim 9
Dependent Claim
10 words
The process of claim 6 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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |