US3718709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing ethylene
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1970-07-31
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Granted: 1973-02-27
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Expires: 1990-07-31
Abstract
Abstract Hydrocarbons having a boiling point above 300* C (fuel oils) are vaporized by means of direct superheated steam; after separation of any liquid components a further amount of superheated steam is added to obtain a feed at 450* -550* C for a tubular pyrolysis reactor operating at 700*-800*C. The total steam content in the feed is 0.5 to 5.0 parts by weight steam per part by weight of the hydrocarbon.
Inventors
- 👤 M Simonetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:46
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; C10G2400/00; C10G2400/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
The process of claim 1 wherein the hydrocarbon mixture is a heavy fuel oil.
Claim 2
Dependent Claim
31 words
The process according to claim 1 wherein the proportion of steam present in said feed mixture is from 1.5 to 3.0 parts by weight per part by weight of the hydrocarbon.
Claim 3
Dependent Claim
18 words
The process according to claim 1 wherein said feed mixture is pyrolyzed for from 1.5 to 2 seconds.
Claim 4
Dependent Claim
18 words
The process according to claim 1 wherein said normally gaseous hydrocarbons are quenched to about 300* to 400*C.
Claim 5
Dependent Claim
15 words
The process according to claim 5 wherein said normally gaseous hydrocarbons are quenched with water.
Claim 6
Dependent Claim
12 words
The process according to claim 1 whereby deposits of coke are reduced.
References Cited (Backward Citations)
US2363903A
Cited
US2366521A
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US3103485A
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US3487121A
Cited
US3579601A
Cited
US3597494A
Cited
US3579438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |