US4070411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of lower olefins to isobutane
Assignee: Mobil Oil AS
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Filing: 1976-10-07
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Granted: 1978-01-24
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Expires: 1996-10-07
Abstract
Abstract The conversion of lower olefins, such as ethylene or propylene, in effective contact with HZSM-11 catalyst at elevated temperatures to produce a product having a significant isobutane content.
Inventors
- 👤 Stephen A. Butter
- 👤 Warren W. Kaeding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:35
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/74; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
In the process of converting a feed consisting of ethylene to a product comprising isobutane and n-butane by contacting such ethylene with a ZSM-5 type of crystalline alumino-silicate zeolite at a given set of operating conditions including a space velocity of about 0.5 to 10 WHSV and a temperature of at least about 300° C; the improvement which comprises utilizing as said zeolite ZSM-11 and operating at said given combination set of conditions such as to produce a product having an iso-butane to n-butane ratio of at least about 6 and separating a C 4 fraction comprising butanes that contain at least about 85% iso-butane.
Claim 2
Dependent Claim
105 words
In the process of converting a feed consisting of ethylene to a product comprising isobutane and n-butane by contacting such ethylene with a ZSM-5 type of crystalline alumino-silicate zeolite at a given set of operating conditions including a space velocity of about 0.5 to 10 WHSV and a temperature of at least about 300° C; the improvement which comprises utilizing as said zeolite ZSM-11 and operating at said given combination set of conditions such as to produce a product having an iso-butane to n-butane ratio of at least about 6 and separating a C 4 fraction comprising butanes that contain at least about 85% iso-butane.
Claim 3
Dependent Claim
18 words
The improved process claimed in claim 1 carried out with undiluted ethylene feed up to about 515° C.
Claim 4
Dependent Claim
21 words
The improved process claimed in claim 1 carried out with an inert gas diluted ethylene feed up to about 400° C.
Claim 5
Dependent Claim
14 words
The improved process claimed in claim 1 carried out using HZSM-11 as the zeolite.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |